COLUMN_NAME	DESCRIPTION	LEGAL_VALUES
UID	Unique identifier for the site/visit	
SITE_ID	NWCA Site ID	
VISIT_NO	Visit Number	
UNIQUE_ID	"Unique site ID based on location that does not depend on year sampled or any other factor. Form is NWC_ss_nnnnn  where ss state and nnnnn is number that starts at 10001.   No missing or \blank\"" values allowed. NA"""	
DSGN_CYCLE	NWCA survey design time period. No missing or blank values allowed.	2011|2016|2021
SITETYPE	"Site type (Probability-based or hand-picked). PROB for sites from probability survey.  HAND for hand-picked sites.  No missing or \blank\"" values allowed."""	PROB|HAND|
WGT_TP	"NWCA adjusted weight for site, used to create population estimates for the Target Population. They account for sites with unknown status and sites known to be target but not sampled. Handpicked sites and unsampled sites have a weight of 0."	
LAT_DD83	"Latitude in decimal degrees of wetland site  at the evaluated or sampled site location for 2011 and design latitude for wetland site for 2016.  No missing or \blank\"" values allowed."""	
LON_DD83	"Longitude in decimal degrees of wetland site from the survey design, , i.e., \design longitude.\""  Note that this is at the evaluated or sampled site location for NWCA 2011 due to concerns about location of sites that were moved and design longitude for wetland site for 2016.  No missing or \""blank\"" values allowed."""	
LAT_ANALYS	"Latitude in decimal degrees of wetland site sampled or design latitude if site not sampled.  Used for analyses where actual plot location is required.  No missing or \blank\"" values allowed."""	
LON_ANALYS	"Longitude in decimal degrees of wetland site sampled or design longitude if site not sampled.    Used for analyses where actual plot location is required.  No missing or \blank\"" values allowed."""	
XCOORD	"x-coordinate from US Contiguous Albers Equal Area Conic projection.  No missing or \blank\"" values allowed.  Projection: sph = \""GRS80\"", clon = -96, clat = 37.5, sp1 = 29.5, sp2 = 45.5"""	
YCOORD	"y-coordinate from US Contiguous Albers Equal Area Conic projection.  No missing or \blank\"" values allowed.  Projection: sph = \""GRS80\"", clon = -96, clat = 37.5, sp1 = 29.5, sp2 = 45.5"""	
AG_ECO3	"NARS 3-level reporting region (2015), based on aggregating AG_ECO9 reporting regions.   No missing or \blank\"" values allowed."""	EHIGH|PLNLOW|WMTNS|
AG_ECO9	"NARS 9-level reporting region, based on aggregated Omernik Level III ecoregions.   No missing or \blank\"" values allowed."""	CPL|NAP|NPL|SAP|SPL|TPL|UMW|WMT|XER|
COAST_REG	"FWS S & T coastal region name.  Used by US Fish and Wildlife Service to identify coastal wetland region.  \NotCoast\"" if not in coastal region.  No missing values allowed."""	Great Lakes Region|Gulf Coast Region|North East Coast Region|Pacific Coast Region|South East Coast Region|Not Coast|
EPA_REG	"EPA Region.  No missing or \blank\"" values allowed."""	Region_01|Region_02|Region_03|Region_04|Region_05|Region_06|Region_07|Region_08|Region_09|Region_10|
FED_NONFED	"Federal or Non-Federal land, based on OWN_NARS. OWN_NARS in FWS, Other Fed, USFS, NPS, NOAA, BLM, DOD, BOR considered Federal and all others Non-Federal."	Federal|Non-Federal
HYD_CLS	Hydrologic class based on NWCA aggregated wetland classes	INLAND|TIDAL
MAJ_BAS_NM	"Name of major USGS Hydrologic Basins derived from NHDPlus codes.  No missing or \blank\"" values allowed."""	Arkansas-White-Red Region|California Region| Great Basin Region|Great Lakes Region|Lower Colorado Region|Lower Mississippi Region|Mid Atlantic Region|Missouri Region|New England Region|Ohio-Tennessee Region|Pacific Northwest Region|Rio Grande-Texas-Gulf Region|Souris-Red-Rainy Region|South Atlantic Gulf Region|Upper Colorado Region|Upper Mississippi Region|
MISS_BASIN	"Within Mississippi Basin or outside, based on MAJ_BAS_NM values"	MISSISSIPPI_BASIN|NOT_MISSISSIPPI_BASIN
NEP_NAT	"Site is located in a National Estuary Program watershed.  NEP if site is in an NEP; Not_NEP  if not.  Does not include Chesapeake Bay as an NEP. No missing or \blank\"" values allowed."""	NEP|Not_NEP|
NWCA_ECO4	"4 NWCA aggregated ecoregions. AG_ECO9 is collapsed to make CPL = CPL, EMU = NAP, SAP, UMW; IPL = NPL, SPL, TPL; and W = WMT, XER.  No missing or \blank\"" values allowed."""	CPL| EMU|IPL| W|
NWCA_ECO5	"5 NWCA aggregated ecoregions. AG_ECO9 is collapsed to make CPL = CPL, EMU = NAP, SAP, UMW; IPL = NPL, SPL, TPL; and WMT = WMT, XER = XER.  No missing or \blank\"" values allowed."""	CPL| EMU|IPL| WMT|XER|
OWN_NARS	"Land ownership code derived from USGS PADUS (http://gapanalysis.usgs.gov/padus/data/) - pulled May 2016 version of database. Aggregated to categories used by NARS.  Text of 13 land ownership category names. Similar to OWN_TYPE  in USGS PADUS dataset except that Federal_Land is separated into major federal agencies.   No missing or \blank\"" values allowed."""	BLM|BOR|DOD|Forest Service|FWS|NOAA|Non Federal|NPS|Tribal Land - PAD|
PNWCA_ECO4	"Omernik Level III Ecoregions aggregated into four NWCA Aggregated Ecoregions and applied to the Pacific Northwest National Condition Assessment (PNWCA) sites located in the states of Washington, Oregon, and Idaho: West (W).  Sites not included in the PNWCA are NOT_PNWCA."	W|NOT_PNWCA
PNWCA_ECO5	"Omernik Level III Ecoregions aggregated into five NWCA Aggregated Ecoregions and applied to the Pacific Northwest National Condition Assessment (PNWCA) sites located in the states of Washington, Oregon, and Idaho: Western Mountains (WMT) and Xeric West (XER).  Sites not included in the PNWCA are NOT_PNWCA."	WMT|XER|NOT_PNWCA
PNWCA_WETCLS_GRP	"Aggregated S&T Class that combines wetland type and dominant vegetation type for reporting and applied to the Pacific Northwest National Condition Assessment (PNWCA) sites located in the states of Washington, Oregon, and Idaho: Estuarine Herbaceous (EH), Estuarine Woody (EW), Palustrine, Riverine, and Lacustrine Herbaceous (PRLH), and Palustrine, Riverine, and Lacustrine Woody (PRLW).  Sites not included in the PNWCA are NOT_PNWCA."	EH|EW|PRLH|PRLW|NOT_PNWCA
PNWCA_RPT_UNIT	"A combination of Omernik Level III Ecoregions and USCOE Wetland Regions aggregated into ten NWCA Aggregated Ecoregions and applied to the Pacific Northwest National Condition Assessment (PNWCA) sites located in the states of Washington, Oregon, and Idaho: Pacific Coast (PAC), Western Mountains (WMT), Xeric West (XER).  Sites not included in the PNWCA are NOT_PNWCA."	PAC|WVM|ARW|NOT_PNWCA
PSTL_CODE	"State two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands.  No missing or \blank\"" values allowed."""	
RPTGRP_10	"Combination of 4 NWCA ecoregions (NWCA_ECO4) by 4 Aggregated Wetland classes (WETCLS_EVL).  Initially defined for NWCA 2011.  No missing or \blank\"" values allowed."""	ALL-EH|ALL-EW|CPL-PRLH|CPL-PRLW|EMU-PRLH|EMU-PRLW|IPL-PRLH|IPL-PRLW|W-PRLH|W-PRLW |
RPTGRP_12	"Combination of 5 NWCA ecoregions (NWCA_ECO5) by 4 Aggregated Wetland classes (WETCLS_EVL).  Initially defined for NWCA 2016.  No missing or \blank\"" values allowed."""	ALL-EH|ALL-EW|CPL-PRLH|CPL-PRLW|EMU-PRLH|EMU-PRLW|IPL-PRLH|IPL-PRLW|WMT-PRLH|WMT-PRLW|XER-PRLH|XER-PRLW|
RPT_UNIT	"NWCA Reporting unit code based on NWCA aggregated wetland classes, aggregated Omernik Level III ecoregions, and state to distinguish coastal from inland wetlands by region"	ARW|ATL|GFC|GPL|ICP|NCE|PAC|SAP|TPL|WVM
RPT_UNIT_5	"Recategorization of RPT_UNIT to distinguish estuarine regions and inland regions, combines ARW and WVM into WST"	EMU|ICP|PLN|TDL|WST
RPT_UNIT_6	"Recategorization of RPT_UNIT to distinguish estuarine regions and inland regions, keeping ARW and WVM separate"	ARW|EMU|ICP|PLN|TDL|WVM
RPT_UNIT20	Recategorization of RPT_UNIT to include designation as woody or herbaceous	ARW-H|ARW-W|ATL-H|ATL-W|GFC-H|GFC-W|GPL-H|GPL-W|ICP-H|ICP-W|NCE-H|NCE-W|PAC-H|PAC-W|SAP-H|SAP-W|TPL-H|TPL-W|WVM-H|WVM-W
WETCLS_EVL	"Wetland class from site evaluation.  If sampled in field, then wetland class assigned when sampled.  If evaluated in field but not sampled, then wetland class assigned from field visit.  If site only evaluated in office, then wetland class assigned at that time.  If no site evaluation information on wetland class, then wetland class assigned wetland class used for the survey design.  Hand-picked sites should be assigned during field sampling.  Wetland classes use FWS S&T classes.  No missing or \blank\"" values allowed."""	E2EM|E2SS|PEM|PF|PFO|PSS|PUBPAB|
WETCLS_GRP	"4 NWCA aggregated wetland classes used for reporting. EH is estuarine herbaceous (E2EM); EW is estuarine woody (E2SS); PRLH is inland herbaceous (PEM, PF, PUBPAB); PRLW is inland woody (PFO, PSS).   No missing or \blank\"" values allowed."""	EH|EW|PRLH|PRLW|
WETCLS_HGM	"Wetland HGM class determined in field. Only available for target sampled sites. It is possible for a sampled site not to have HGM assigned.  In this case the value is UND for undetermined. No missing or \blank\"" values allowed."""	DPRSS|FLATS|FRINGE|RIVERINE|SLOPE|TIDAL|UND
WETCLS_HGM2	"Hydrogeomorphic (HGM) classes, separated into natural and altered HGM subclasses from QAed and validated values (HGM_CLASS_VALID and HGM_SUBCLASS_VALID in tblASSESSMENT) designated on field on Form AA-2 on date of sampling. Altered HGM subclasses are indicated by an appended _ALT. Note that _ALT indicates historic HGM class that should be at the site, denoting that it has been altered (e.g., a site that was historically FLATS but excavated into a depression would be designated as FLATS_ALT)."	DEPRESSION|DEPRESSION_ALT|FLATS|FLATS_ALT|LACUSTRINE|LACUSTRINE_ALT|RIVERINE|RIVERINE_ALT|SLOPE|SLOPE_ALT|TIDAL|TIDAL_ALT
WETCLS_ALT	"Based on WETCLS_HGM2, distinguishes HGM altered sites from not altered sites using QAed and validated values (HGM_CLASS_VALID and HGM_SUBCLASS_VALID in tblASSESSMENT) designated on form AA-2 on date of sampling. HGM_ALTERED includes DEPRESSION_ALT, FLATS_ALT, LACUSTRINE_ALT, RIVERINE_ALT, SLOPE_ALT, and TIDAL_ALT, while HGM_NOT_ALTERED includes DEPRESSION, FLATS, LACUSTRINE, RIVERINE, SLOPE, and TIDAL."	HGM_ALTERED|HGM_NOT_ALTERED
NWCA_ECO4_HYD	"Omernik Level III Ecoregions aggregated into four NWCA Aggregated Ecoregions (NWCA_ECO4) and distinguished by inland sites (HYD_CLS = INLAND) or tidal saline sites (HYD_CLS = TIDAL): Coastal Plains Inland (CPL-INLAND), Coastal Plains Tidal (CPL-TIDAL), Eastern Mountains & Upper Midwest Inland (EMU-INLAND), Eastern Mountains & Upper Midwest Tidal (EMU-TIDAL) , Interior Plains Inland (IPL-INLAND), West Inland (W-INLAND), West Tidal (W-TIDAL).  Note that there are no Interior Plains Tidal sites, thus there is no IPL-TIDAL subpopulation."	CPL-TIDAL|CPL-INLAND|W-INLAND|W-TIDAL|IPL-INLAND|EMU-INLAND|EMU-TIDAL
NWCA_ECO5_HYD	"Omernik Level III Ecoregions aggregated into five NWCA Aggregated Ecoregions (NWCA_ECO5) and distinguished by inland sites (HYD_CLS = INLAND) or tidal saline sites (HYD_CLS = TIDAL): Coastal Plains Inland (CPL-INLAND), Coastal Plains Tidal (CPL-TIDAL), Eastern Mountains & Upper Midwest Inland (EMU-INLAND), Eastern Mountains & Upper Midwest Tidal (EMU-TIDAL) , Interior Plains Inland (IPL-INLAND), Western Valleys & Mountains Inland (WMT-INLAND), Western Valleys & Mountains Tidal (WMT-TIDAL), Xeric West Inland (XER-INLAND), and Xeric West Tidal (XER-TIDAL).  Note that there are no Interior Plains Tidal sites, thus there is no IPL-TIDAL subpopulation."	CPL-TIDAL|CPL-INLAND|WMT-INLAND|XER-TIDAL|XER-INLAND|IPL-INLAND|EMU-INLAND|EMU-TIDAL|WMT-TIDAL
MICX_DETECT	Microcystin Detection	Detected|Not Detected|Not Assessed
MICX_EPA_COND	Microcystin condition based on EPA benchmark	Above Benchmark|At or Below Benchmark|Not Assessed
NTL_COND	Condition class based on total nitrogen	Good|Fair|Poor|Not Assessed
PTL_COND	Condition class based on total phosphorus	Good|Fair|Poor|Not Assessed
STRESS_HEAVYMETAL	Stress class based on soil heavy metals	Low|Moderate|High|Not Assessed
STRESS_NONNATIVE	Stress class based on Non-native Plant Indicator	Low|Moderate|High|Very High|Not Assessed
STRESS_PALT_SUM	Stress class based on sum of all physical alteration metrics	Low|Moderate|High|Not Assessed
STRESS_SOHARD	Stress class based on physical alteration by soil hardening	Low|Moderate|High|Not Assessed
STRESS_SOMODF	Stress class based on physical alteration by soil modification	Low|Moderate|High|Not Assessed
STRESS_VEGREP	Stress class based on physical alteration by vegetation replacement	Low|Moderate|High|Not Assessed
STRESS_VEGRMV	Stress class based on physical alteration by vegetation removal	Low|Moderate|High|Not Assessed
STRESS_WADSUB	Stress class based on physical alteration by water addition or substraction	Low|Moderate|High|Not Assessed
STRESS_WOBSTR	Stress class based on physical alteration by water obstruction	Low|Moderate|High|Not Assessed
VEGCOND_2016	NWCA 2016 Vegetation Condition Class based on VMMI_2016	Good|Fair|Poor|Not Assessed
MICX_MDL	Method detection limit for microcystin (ug/L)	
MICX_RL	Laboratory reporting limit for microcystin (ug/L)	
MICX_RESULT	Measured concentration of microcystin (ug/L)	
RFREQ_AC	Relative frequency of alien and cryptogenic species occurrence in flora based on 5 100-m2 plots	
TOTN_AC	Total Number of  alien and cryptogenic Species across AA  (based 500 m2 sample area - 5 100-m2 plots)	
VMMI_2016	NWCA 2016 Vegetation Multimetric Index Score	
XRCOV_AC	Mean relative cover of all aliena and cryptogenic species or lowest taxonomic unit across 100-m2 plots as a percentage of total cover	
HMI	Heavy Metals Index for soil	
PALT_SOHARD	Soil hardening physical alteration metric	
PALT_SOMODF	Soil modification physical alteration metric	
PALT_VEGREP	Vegetation replacement physical alteration metric	
PALT_VEGRMV	Vegetation removal physical alteration metric	
PALT_WADSUB	Water addition/subtraction physical alteration metric	
PALT_WOBSTR	Water flow obstruction physical alteration metric	
PTL_MDL	Method detection limit for total phosphorus (ug/L)	
PTL_RESULT	Total phosphorus result (ug/L)	
PTL_RL	Laboratory reporting limit for total phosphorus (ug/L)	
NTL_NARS_FLAG	NARS standardized QA flag for total nitrogen result	
NTL_RESULT	Total nitrogen result (mg/L)	
PTL_NARS_FLAG	NARS standardized QA flag for total phosphorus result	
NTL_MDL	Method detection limit for total nitrogen (mg/L)	
NTL_RL	Laboratory reporting limit for total nitrogen (mg/L)	
PUBLICATION_DATE	Date the dataset was published to the NARS site