"VARIABLE" "DESCRIPTION" "SAMPLE_TYPE" "UNITS" "RANGE_LOW" "RANGE_HIGH" "LEGAL_VALUES" "AGGR_ECO3_2015" "NARS 3-level reporting region (2015), based on aggregating AGGR_ECO9_2015 reporting regions: EHIGH=Eastern Highlands (NAP, SAP); PLNLOW=Plains and Lowlands (CPL, NPL, SPL, TPL, UMW); WMTNS=Western Mountains and Xeric (WMT, XER)." "AGGR_ECO9_2015" "NARS 9-level reporting region (2015), based on aggregated Omernik Level III ecoregions: CPL=Coastal Plains; NAP=Northern Appalachians; NPL=Northern Plains; SAP=Southern Appalachians; SPL=Southern Plains; TPL=Temperate Plains; UMW=Upper Midwest; WMT=Western Mountains; XER=Xeric West." "DATE_COL" "Date of field collection" "EPA_REG" "EPA region" "GREAT_RIVER" "Great river site" "HUC8" "8-digit HUC catalog unit number" "INDEX_VISIT" "Index visit for NRSA population estimates" "INDEXVIS_FTIS" "Index visit for NRSA population estimates for fish tissue only" "LAT_DD83" "Nominal latitude in decimal degrees" "LMR_SITE" "Lower Mississippi River site" "LOC_NAME" "Site name from verification form" "LON_DD83" "Nominal longitude in decimal degrees" "MASTER_SITEID" "If used in WSA, WSA Site_ID. If new, current Site_ID" "MISS_SUB" "Mississippi sub-basin" "RT_NRSA" "Reference/So-so/Trashed designations for sites used in NRSA" "RT_NRSA_CAT" "Impact designations for use in indicator development for NRSA" "RT_NRSA_FISH" "RT_NRSA designation specific to Fish indicator development" "RT_NRSA_PHAB" "RT_NRSA designation specific to physical habitat indicator development, based separate criteria" "SITE_CLASS" "Site class (NAWQA, PROB, HAND)" "SITE_ID" "Site identification code" "STATE" "State in which site located" "STRAHLERORDER" "Strahler stream order from RF3 stream data" "UID" "Unique site visit ID" "URBAN" "Urban site" "US_L3CODE_2015" "Omernik Level III ecoregion code (2015)" "US_L4CODE_2015" "Omernik Level IV ecoregion code (2015)" "VISIT_NO" "Visit number for that year" "WGTNRSA09" "NRSA population weight for site" "XLAT_DD" "X-site GPS latitude decimal degrees" "XLON_DD" "X-site GPS longitude decimal degrees" "YEAR" "Sampling year"