PARAMETER LABEL LEGAL_VALUES RANGE_HIGH RANGE_LOW UNITS TROPHIC_STATE Trophic state (Oligotrophic/Mesotrophic/Eutrophic/Hypereutrophic) |OLIGOTROPHIC|MESOTROPHIC|EUTROPHIC|HYPEREUTROPHIC NA NA NA TROPHIC_STATE Trophic state (Oligotrophic/Mesotrophic/Eutrophic/Hypereutrophic) Oligotrophic|Mesotrophic|Eutrophic|Hypereutrophic|Not Assessed NA NA NONE MMI_BENT_NLA12 NLA 2012 Benthic MMI score NA 100 0 NONE BENT_COND Benthic macroinvertebrate MMI condition class Good|Fair|Poor|Not Assessed NA NA NONE ZOOP_COND Zooplankton MMI condition class Good|Fair|Poor|Not Assessed NA NA NONE INDEX_NLA "Index visit for lake (used in population estimates). For sites visited, VISIT_NO=1 is designated as the index visit (even if no samples were collected). Blank= not assigned (sites not evaluated or not needed). Y=Index visit, N=Not index visit" Y|N| NA NA NA REF_NLA12_NUTR Disturbance category for nutrients for NLA 2012 R|S|T NA NA NA RT_NLA12_BENT Disturbance category for benthic macroinvertebrates for NLA 2012 R|S|T NA NA NA RT_NLA12_ZOOP Disturbance category for zooplankton for NLA 2012 R|S|T NA NA NA AMITOTAL Aquatic macrophytes: index of total cover of aquatic macrophytes NA NA NA NA HORIZDD Horizontal drawdown distance NA NA NA m LitCvrQc3OE NLA 2012 Shallow water habitat condition indicator NA NA NA None LitRipCvrQc3OE NLA 2012 Lake habitat complexity condition indicator NA NA NA None RDis_IX NLA 2012 Lakeshore disturbance condition indicator NA NA NA None RVegQc3OE NLA 2012 Riparian vegetation condition indicator NA NA NA None VERTDD Vertical drawdown distance NA NA NA m INDEX_LAT_DD Lattitude in decimal degrees at index site NA NA NA dd INDEX_LON_DD Longitude in decimal degrees at index site NA NA NA dd INDEX_SITE_DEPTH Depth at the index site NA 25 0 m AGGR_ECO3_2015 "NARS 3-level reporting region (2015), based on aggregating AGGR_ECO9_2015 reporting regions" EHIGH|PLNLOW|WMTNS NA NA NA AGGR_ECO9_2015 "NARS 9-level reporting region (2015), based on aggregated Omernik Level III ecoregions" CPL|NAP|NPL|SAP|SPL|TPL|UMW|WMT|XER NA NA NA AREA_HA Surface area of lake based on NHD polygon NA NA NA NA COMID2012 NHD common identifier for NLA 2012 sampling frame NA NA NA NA ELEVATION "Elevation at lake coordinates (LAT_DD_N83, LON_DD_N83) from NHD Digital Elevation Map layer" NA NA NA NA EPA_REG EPA Region NA NA NA NA STATE State lake is assigned to for sampling in NLA 2012 NA NA NA NA WGT_ALL Adjusted weight for site. To be used for NLA national population estimation NA NA NA NA LAKE_ORIGIN "Lake origin based on codes used in NLA 2007:MAN-MADE=includes LAKE-ORIGIN12= MAN_MADE, MAN_MADE_AB, and RESERVOIR; NATURAL=includes LAKE_ORIGIN12=NATURAL and NATURAL_ENH; UNCERTAIN= Includes LAKE_ORIGIN12=UNCERTAIN" MAN-MADE|NATURAL|UNCERTAIN NA NA NA RT_NLA12 NLA Reference Class Assignment: R=reference; S=intermediate; T=impacted R|S|T NA NA NA SITE_ID Identification code for site NA NA NA NA VISIT_NO Sequential number of visit to site |1|2 NA NA NA MMI_ZOOP_NLA6 Zooplankton MMI score NA 100 0 None UID Unique identifier for sampling event NA NA NA NONE CHLX_RESULT Result x-site chlorophyll a NA NA NA ug/L CHLX_UNITS X-site Chlorophyll a units NA NA NA COLOR_RESULT X-site Color NA NA NA COLOR_UNITS X-site Color units NA NA NA CHLORIDE_RESULT X-site Chloride concentration NA NA NA CHLORIDE_UNITS X-site Chloride units NA NA NA MICX_UNITS Units for x-site Microcystin NA NA NA MICX_RESULT X-site Microcystin NA NA NA ppb NTL_RESULT Total Nitrogen NA NA NA mg/L NTL_UNITS Total nitrogen units NA NA NA PTL_RESULT Total Phosphorus NA NA NA ug/L PTL_UNITS Total phosphorus units NA NA NA ATRAZINE_UNITS Atrazine units NA NA NA ATRAZINE_RESULT Atrazine value NA NA NA ppb TOTALHG_UNITS Top sediment total mercury units NA NA NA TOTALHG_RESULT Top sediment total mercury value NA NA NA ng/g METHYLMERCURY_UNITS Top sediment methylmercury units NA NA NA METHYLMERCURY_RESULT Top sediment methylmercury value NA NA NA ng/g