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Map Monitoring Sites
The links below launch KMZ files which can be viewed with Google Earth™ and other software applications compatible with KML or KMZ. If you would like to use Google Earth, you can access the Google Earth User Guide
for directions for downloading and installing.
These files contain air quality monitoring site information for the networks listed below. The monitoring site information comes from the AQS Data Mart. In addition to viewing the site information, you can download annual and daily data by clicking a link in the placemark balloon. These files show all monitors having any data since 1990.
- Criteria Pollutant Networks
- CO, Lead, NO2, Ozone, PM10, PM2.5, SO2 hourly
- SO2 5-minute (monitors reporting twelve 5-minute values every hour)
- SO2 max 5-minute (monitors reporting the maximum of the twelve 5-minute values)
- Other Networks
- PM2.5 Chemical Speciation Network - "Trends Speciation" and "Supplemental Speciation" monitors only
- IMPROVE - Interagency Monitoring of Protected Visual Environments
- NATTS - National Air Toxics Trends Stations
We are also posting a kml file that provides additional information for air toxics monitoring sites. This file allows you to see all monitors (in addition to NATTS) that measured any air toxics data during the period 2003 to 2005. When you click on the placemark, you can see descriptive site information and a list of all hazardous air pollutants (HAPs) measured at that site. HAPs are typically grouped into four categories which are distinguished by color in the kml file. Volatile organic compounds (VOCs) are purple, semivolatile organic compounds (SVOCs) are pink, carbonyl compounds are orange, and metals are blue.
Note that some monitoring site coordinates may be based on a different projection system than Google Earth's, resulting in a slight visual shift (less than a mile) from the actual location. These files are provided by EPA and are not hosted on a Google Earth server. Users new to Google Earth will notice that there are "layers" of other standard information provided in the Google Earth software that are independent of these files. They provide the ability to overlay additional geographic information like roads, topography, and landmarks. Some of these layers may already be turned on when you open Google Earth. If not, you can turn them on simply by selecting the appropriate checkbox.