We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Superfund

USGS Background Soil-Lead Survey: State Data

National Interactive Map (Choose your State to Begin)

Map of the United StatesAlabamaArizonaArkansasCaliforniaColoradoConnecticutDelawareWashington, DCFloridaGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachussetsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasTrust TerritoriesUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming


Overview

Potential statistical 'outliers' were determined separately for each state. Specifically, outliers are defined here as soil lead results that are two and three standard deviations greater than the average. Spatial outliers were defined using Anselin's Local Moran's I statistic to identify observations that were statistically significantly different from other nearby observations.1 The spatial outliers include observations that are surrounded by observations with significantly lower concentrations. The definition of spatial outlier used here also includes local clusters of two or more observations with significantly higher concentrations than surrounding observations.

It is important to note that labeling an observation as an 'outlier' does not imply there is something necessarily 'wrong' with the observation; e.g., outliers should not automatically be omitted from an analysis or discarded as invalid. The method for handling outliers varies depending on the objectives of the analysis. Furthermore, there are many ways to define outliers; the definition that is used should support the objective of the analysis. The objective of this web site is to simply describe the data. The effect of the outliers on summary statistics of the data is illustrated by comparing the statistics in the tables provided below. The user is encouraged to download the data for further exploration and analysis, including a determination of which observations should be considered outliers, given the objectives of their analysis.

1 Anselin, 1995. Local Indicators of Spatial Association-LISA. Geographical Analysis, 27(2). April. 93-115 (PDF)(23 pp, 1.5 MB)


Alabama State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
85 14.2 0.8 15.6 7.6 0.534 0.3 9.6 12.2 17.4 24.9 29.6 39.3 39.3

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
83 13.6 0.7 14.8 6.6 0.484 0.3 9.1 12.1 17.1 23.9 28.0 31.8 31.8

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Alabama Normal PercentilesAlabama Lognormal Percentiles

 

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Top of Page


Arizona State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
177 23.7 1.3 25.9 17.9 0.753 6.3 15.7 20.1 26.3 35.6 42.5 123.0 161.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
173 21.4 0.7 22.5 8.8 0.411 6.3 15.6 20.0 26.1 32.7 39.2 50.8 59.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Arizona Normal PercentilesArizona Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Arkansas State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
87 20.7 1.5 23.2 14.0 0.680 0.3 12.9 18.0 23.9 28.7 46.6 105.0 105.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
85 19.1 1.0 20.8 9.3 0.488 0.3 12.9 18.0 23.5 28.4 33.1 57.7 57.7

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Arkansas Normal PercentilesArkansas Lognormal PercentilesAbout These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


California State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
258 19.7 1.3 21.8 20.4 1.032 3.0 12.6 16.8 20.9 28.1 33.2 92.7 263.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
255 17.9 0.5 18.8 8.4 0.467 3.0 12.5 16.8 20.7 27.8 32.3 48.6 70.1

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsCalifornia Normal PercentilesCalifornia Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Colorado State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
165 45.4 11.4 64.3 147.0 3.240 8.9 20.9 24.4 30.6 39.3 51.5 1010.0 1610.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
163 29.8 2.2 33.5 27.8 0.932 8.9 20.8 24.3 30.5 38.8 46.8 170.0 312.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsColorado Normal PercentilesColorado Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Connecticut State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
9 49.9 8.1 65.0 24.3 0.487 19.1 30.6 38.2 68.8 88.8 88.8 88.8 88.8

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
9 49.9 8.1 65.0 24.3 0.487 19.1 30.6 38.2 68.8 88.8 88.8 88.8 88.8

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsConnecticut Normal PercentilesConnecticut Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Delaware State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
2 18.2 4.4 46.0 6.2 0.342 13.8 13.8 18.2 22.6 22.6 22.6 22.6 22.6

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
2 18.2 4.4 46.0 6.2 0.342 13.8 13.8 18.2 22.6 22.6 22.6 22.6 22.6

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsDelaware Normal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Florida State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
89 6.4 0.5 7.3 4.8 0.753 0.3 2.5 4.7 11.1 11.3 14.0 29.0 29.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
88 6.2 0.5 6.9 4.2 0.683 0.3 2.5 4.7 11.1 11.3 13.5 16.3 16.3

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsFlorida Normal PercentilesFlorida Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Georgia State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
94 13.2 0.9 14.7 8.9 0.670 2.7 6.7 11.4 15.8 25.1 31.0 53.0 53.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
93 12.8 0.8 14.2 7.9 0.615 2.7 6.7 11.4 14.7 24.4 29.5 38.7 38.7

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsGeorgia Normal PercentilesGeorgia Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Idaho State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
131 25.2 4.3 32.3 48.8 1.936 5.5 15.2 18.5 21.9 26.6 32.7 158.0 541.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
130 21.2 1.6 23.9 18.0 0.846 5.5 15.2 18.4 21.8 26.6 32.2 119.0 158.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsIdaho Normal PercentilesIdaho Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Illinois State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
88 26.4 1.2 28.5 11.5 0.434 14.0 20.3 24.0 28.1 38.4 47.0 103.0 103.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
87 25.6 0.9 27.0 8.0 0.314 14.0 20.2 23.8 28.0 36.5 45.6 54.1 54.1

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsIllinois Normal PercentilesIllinois Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Indiana State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
57 30.7 7.2 42.8 54.4 1.771 8.2 18.6 21.0 25.7 29.5 78.5 423.0 423.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
56 23.7 1.7 26.6 13.0 0.547 8.2 18.6 21.0 25.5 28.8 47.3 83.9 83.9

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsIndiana Normal PercentilesIndiana Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Iowa State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
91 23.1 0.7 24.1 6.2 0.270 8.4 19.4 21.7 25.3 29.9 35.0 48.5 48.5

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
89 22.5 0.5 23.4 5.1 0.229 8.4 19.4 21.6 24.7 29.8 32.5 38.2 38.2

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsIowa Normal PercentilesIowa Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Kansas State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
132 26.6 3.3 32.0 37.9 1.427 9.8 19.1 21.3 25.9 32.4 38.0 66.9 450.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
131 23.3 0.7 24.5 7.7 0.332 9.8 19.0 21.3 25.9 31.8 37.7 51.9 66.9

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

ChartsKansas Normal PercentilesKansas Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Kentucky State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
64 29.2 2.5 33.3 20.1 0.689 12.4 19.0 22.4 28.9 43.6 85.9 111.0 111.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
61 25.7 1.6 28.4 12.5 0.488 12.4 19.0 22.3 26.5 38.7 43.6 85.9 85.9

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsKentucky Normal PercentilesKentucky Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Louisiana State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
75 21.2 1.6 23.9 14.0 0.659 6.7 11.8 18.7 25.7 34.1 46.7 90.8 90.8

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
73 19.5 1.1 21.2 9.0 0.464 6.7 11.8 18.3 24.8 31.8 36.2 47.2 47.2

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsLouisiana Normal PercentilesLouisiana Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Maine State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
53 35.4 5.6 44.7 40.4 1.142 7.2 19.2 22.9 32.1 59.4 91.7 233.0 233.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
51 28.1 2.2 31.8 15.9 0.567 7.2 19.1 22.6 31.1 43.2 68.4 91.7 91.7

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMaine Normal PercentilesMaine Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Maryland State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
18 42.2 8.8 57.5 37.1 0.879 11.7 19.0 27.6 45.9 117.0 150.0 150.0 150.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
18 42.2 8.8 57.5 37.1 0.879 11.7 19.0 27.6 45.9 117.0 150.0 150.0 150.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMaryland Normal PercentilesMaryland Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Massachusetts State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev

Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
14 72.2 20.6 108.6 77.0 1.067 24.2 34.2 53.4 71.6 109.0 327.0 327.0 327.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev

Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
13 52.6 6.8 64.7 24.5 0.466 24.2 34.2 44.3 64.9 76.4 109.0 109.0 109.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMassachusetts Normal PercentilesMassachusetts Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Michigan State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
95 17.1 0.8 18.4 7.4 0.432 8.3 12.6 15.2 18.5 28.0 31.2 56.6 56.6

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
93 16.4 0.6 17.4 5.7 0.347 8.3 12.6 15.1 18.2 24.5 28.9 35.6 35.6

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMichigan Normal PercentilesMichigan Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Minnesota State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
137 16.6 0.4 17.3 4.9 0.292 3.6 13.7 16.1 18.2 21.8 26.6 34.6 37.2

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
134 16.2 0.4 16.8 4.1 0.251 3.6 13.5 16.0 18.2 20.8 22.8 29.2 29.8

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMinnesota Normal PercentilesMinnesota Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Mississippi State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
77 22.2 2.8 26.9 24.7 1.110 4.5 12.7 16.4 21.8 33.6 52.7 181.0 181.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
75 18.6 1.2 20.6 10.3 0.552 4.5 12.3 16.0 21.6 32.0 43.1 55.1 55.1

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMississippi Normal PercentilesMississippi Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Missouri State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
115 29.2 2.8 33.9 30.5 1.044 9.3 20.0 24.0 28.4 36.9 47.1 176.0 298.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
113 25.5 0.9 27.0 9.7 0.380 9.3 20.0 23.9 27.8 35.7 42.1 57.9 87.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsMissouri Normal PercentilesMissouri Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Montana State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
239 19.8 0.7 21.0 10.9 0.550 4.2 14.6 17.2 21.1 27.5 40.3 61.9 113.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
232 18.4 0.4 19.1 6.5 0.352 4.2 14.6 17.2 20.6 25.2 31.6 42.3 47.4

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Montana Normal PercentilesMontana Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Nebraska State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
130 18.9 0.8 20.3 9.4 0.495 9.1 14.8 18.5 21.6 25.2 26.4 29.2 110.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
129 18.2 0.4 18.9 4.8 0.264 9.1 14.8 18.5 21.5 24.8 26.3 28.9 29.2

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsNebraska Normal PercentilesNebraska Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Nevada State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
171 80.2 58.4 176.7 763.1 9.521 6.1 16.8 21.1 25.5 30.2 33.0 76.5 10000.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
170 21.8 0.6 22.8 7.8 0.356 6.1 16.8 21.1 25.2 30.1 31.3 50.3 76.5

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Nevada Normal PercentilesNevada Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


New Hampshire State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
15 54.6 10.9 73.7 42.0 0.770 20.4 28.1 36.2 73.5 112.0 174.0 174.0 174.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
15 54.6 10.9 73.7 42.0 0.770 20.4 28.1 36.2 73.5 112.0 174.0 174.0 174.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

ChartsNew Hampshire Normal PercentilesNew Hampshire Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


New Jersey State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
13 75.5 29.3 127.7 105.6 1.399 13.1 20.8 22.7 104.0 142.0 398.0 398.0 398.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
12 48.6 12.6 71.3 43.8 0.901 13.1 20.5 22.7 79.9 106.0 142.0 142.0 142.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsNew Jersey Normal PercentilesNew Jersey Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


New Mexico State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
203 16.3 0.4 17.0 6.4 0.390 1.1 12.4 15.8 19.3 24.4 26.9 39.1 43.9

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
200 15.9 0.4 16.6 5.6 0.353 1.1 12.3 15.8 18.9 24.1 26.0 29.7 30.3

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

New Mexico Normal PercentilesNew Mexico Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


New York State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
72 43.0 5.4 52.0 45.4 1.055 10.2 20.6 28.6 45.4 69.4 98.1 276.0 276.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
70 36.4 2.7 41.0 22.9 0.628 10.2 20.4 27.8 43.8 68.6 90.9 112.0 112.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsNew York Normal PercentilesNew York Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


North Carolina State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
83 21.3 1.6 23.9 14.2 0.665 1.5 13.1 19.4 26.2 32.4 37.3 114.0 114.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
82 20.2 1.1 22.0 9.8 0.487 1.5 13.1 19.4 24.8 32.1 36.6 50.9 50.9

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

North Carolina Normal PercentilesNorth Carolina Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


North Dakota State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
118 13.6 0.2 13.9 2.4 0.177 8.6 12.0 13.3 14.7 16.0 18.0 22.2 25.1

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
116 13.4 0.2 13.7 2.0 0.150 8.6 12.0 13.3 14.7 15.6 17.8 18.7 18.9

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

North Dakota Normal PercentilesNorth Dakota Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Ohio State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
68 33.9 2.0 37.3 16.9 0.498 16.6 25.7 30.0 37.5 47.4 49.6 148.0 148.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
67 32.2 1.2 34.1 9.4 0.293 16.6 25.6 29.8 37.5 43.9 48.9 75.0 75.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsOhio Normal PercentilesOhio Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Oklahoma State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
112 17.1 1.1 18.9 12.1 0.708 5.3 11.5 13.7 18.4 24.1 41.1 47.6 109.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
111 16.2 0.8 17.5 8.3 0.514 5.3 11.4 13.7 18.2 23.6 40.7 46.4 47.6

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsOklahoma Normal PercentilesOklahoma Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Oregon State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
152 15.5 0.9 17.1 11.6 0.749 2.7 10.6 13.5 16.9 23.0 26.9 65.1 126.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
150 14.4 0.5 15.3 6.1 0.421 2.7 10.6 13.4 16.8 22.1 24.9 34.4 44.7

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

Oregon Normal PercentilesOregon Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Pennsylvania State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
75 60.2 5.3 68.9 45.6 0.758 14.7 31.8 46.4 69.3 118.0 153.0 261.0 261.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
73 55.0 3.9 61.4 33.2 0.605 14.7 31.8 46.1 66.5 105.0 132.0 161.0 161.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsPennsylvania Normal PercentilesPennsylvania Lognormal Percentiles

 

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Rhode Island State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
1 44.4 - - - - 44.4 44.4 44.4 44.4 44.4 44.4 44.4 44.4

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
Insufficient sample size

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts

No charts available due to insufficient sample size.

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


South Carolina State Data

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
50 15.9 2.0 19.2 13.9 0.870 4.0 7.5 11.9 21.8 29.6 33.4 89.4 89.4

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
49 14.4 1.3 16.6 9.0 0.625 4.0 7.5 11.7 21.2 28.2 33.0 34.8 34.8

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

ChartsSouth Carolina Normal PercentilesSouth Carolina Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


South Dakota State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
120 17.3 0.3 17.8 3.6 0.207 10.7 14.9 17.1 19.2 22.1 23.2 28.0 32.9

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
119 17.2 0.3 17.7 3.3 0.192 10.7 14.8 17.0 19.1 22.0 23.1 24.3 28.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Charts
 

South Dakota Normal PercentilesSouth Dakota Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Tennessee State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
66 25.3 2.1 28.7 16.7 0.662 11.5 18.8 21.5 27.5 33.7 42.5 138.0 138.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
65 23.5 1.1 25.4 9.1 0.386 11.5 18.8 21.5 26.8 31.4 38.2 70.5 70.5

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsTennessee Normal PercentilesTennessee Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Texas State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
431 16.1 0.6 17.0 11.5 0.715 3.1 10.7 14.2 18.7 23.3 27.8 69.4 142.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
425 15.0 0.3 15.5 6.1 0.406 3.1 10.6 14.1 18.3 23.0 25.7 36.5 40.3

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsTexas Normal PercentilesTexas Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Utah State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
131 18.7 1.2 20.6 13.4 0.716 0.9 13.0 14.9 22.3 28.9 35.7 66.1 133.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
129 17.4 0.7 18.5 7.8 0.445 0.9 13.0 14.8 21.5 28.3 33.8 44.2 46.1

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

ChartsUtah Normal PercentilesUtah Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Vermont State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
15 36.6 4.8 45.0 18.4 0.502 11.8 25.3 31.7 53.2 64.0 68.6 68.6 68.6

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
15 36.6 4.8 45.0 18.4 0.502 11.8 25.3 31.7 53.2 64.0 68.6 68.6 68.6

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsVermont Normal PercentilesVermont Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Virginia State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
66 29.0 2.1 32.5 17.0 0.587 9.8 17.0 25.0 35.2 51.9 56.8 87.3 87.3

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
64 27.2 1.8 30.2 14.0 0.515 9.8 16.9 24.2 34.6 47.5 53.3 75.3 75.3

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

Charts

Virginia Normal PercentilesVirginia Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Washington State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
109 48.9 22.8 86.7 238.2 4.874 6.1 12.1 15.5 22.2 42.1 84.1 513.0 2450.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
108 26.6 5.2 35.2 53.8 2.019 6.1 12.0 15.5 22.1 40.6 63.3 219.0 513.0

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

ChartsWashington Normal PercentilesWashington Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


West Virginia State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
39 31.4 1.6 34.1 10.1 0.321 14.1 27.6 31.3 36.5 42.2 53.5 61.2 61.2

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
39 31.4 1.6 34.1 10.1 0.321 14.1 27.6 31.3 36.5 42.2 53.5 61.2 61.2

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date

Charts

West Virginia Normal PercentilesWest Virginia Lognormal Percentiles

About These Charts:
These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Wisconsin State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
88 19.3 1.8 22.4 17.0 0.879 3.9 12.5 16.4 21.7 27.4 34.2 154.0 154.0

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
87 17.8 1.0 19.4 8.9 0.501 3.9 12.3 16.4 21.7 26.1 30.1 67.2 67.2

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsWisconsin Normal PercentilesWisconsin Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

 
 

Top of Page


Wyoming State Data
 

Tables

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (All Data)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
161 18.9 0.4 19.6 5.1 0.269 4.3 15.7 18.1 20.7 25.0 28.8 38.0 38.6

Geogenic Soil Lead Concentrations (mg/kg): 2007-2010 (Outliers Excluded)

Number of
Samples

Mean

Std Error

95 UCL

Std Dev
Coeff of
Variation

Min

Q1

Median

Q3

90th

95th

99th

Max
158 18.5 0.4 19.1 4.4 0.240 4.3 15.6 18.0 20.4 23.9 26.5 33.1 33.5

About These Tables:
These tables show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

ChartsWyoming Normal PercentilesWyoming Lognormal PercentilesAbout These Charts:

These charts show the overall occurrence of lead in surface samples as described by USGS.

Sources of These Data:
The U.S. Geological Survey provided the soil sampling data. The data display was prepared by U.S. Environmental Protection Agency. Revision Date:

Top of Page