Environmental sample concentration

Sample-level Massachusetts public water system PFAS test results, including analyte, collection date, result, limits, method and sampling location.

PFAS analytical results for raw or untreated drinking-water sampling points, supplied through NJDEP Drinking Water Viewer.

Public nationwide point layer republishing SSEHRI's PFAS Contamination Site Tracker, with site identity, state, industry, sampled matrix, year, PFAS concentration measures, notes, and links to supporting testing, source, and government-response material.

NPDES permittees with PFAS discharge monitoring or effluent limits, sourced from EPA's PFAS Analytic Tools 'Discharge Monitoring Reports' layer (ArcGIS FeatureServer layer 15, PAT_Discharge_Monitoring_Reports), itself built from ICIS-NPDES DMR data already restricted upstream to PFAS-family parameters. The raw layer is 96,155 monitoring-event rows (facility x outfall x PFAS parameter x year); fetch.py aggregates client-side to one row per unique NPDES_Permit_Number (1,110 permittees), rolling up distinct parameters monitored, whether any parameter carries an effluent limit, most recent monitoring year, and outfall count. No street address or ZIP is published by this dataset; location is carried by lat/lon (99.91% fill).

EPA's PFAS Analytic Tools 'Federal Sites' layer (PAT_Federal_Sites, FeatureServer layer 13), the full unfiltered nationwide roster of federal facilities (DoD, DOE, NASA, DOT, federal Superfund) with known/suspected/pending PFAS assessment. 762 sites nationwide. No street address exists upstream; near-complete coordinate coverage. A sibling Source, us_epa__pfas_federal_sites_tx, queries the same layer filtered to Texas only for a different Attribute (AQUEOUS_FOAM) -- neither supersedes the other.

Texas AFFF sites (AQUEOUS_FOAM) = 35 federal (DoD/DOE) installations with PFAS presence (from Aqueous Film Forming Foam use), from EPA's PFAS Analytic Tools 'Federal Sites' layer (PAT_Federal_Sites, FeatureServer/13) filtered to State='TX'. Sourced federally because TX TCEQ maintains NO dedicated AFFF inventory (confirmed: no PFAS/AFFF layer on gisweb.tceq.texas.gov, none on data.texas.gov). Same source family as the Verified us_epa__pfas_afff / us_epa__pfas_npl_sites / us_epa__pfas_tsca sources. Coordinate-only (installation centroids; layer has no street/city/zip): ds_lat/lon 100% (all in TX bbox) → Fit; ds_state='TX' constant. Composition: Air Force 12, Army 13, Navy 7, DOE 3; PFAS_Presence Known 16 / Suspected 14 / Pending 2 / blank 3. Within predicted band 15-85. DoD-only — excludes civilian airport/fire-training AFFF sites (TX publishes none).

Statewide Georgia drinking-water PFAS monitoring layer for public and semi-public water systems and treatment plants.

Laboratory sample results from MDE’s phased study of PFAS in public drinking-water systems.

NC DEQ results from 2022 municipal and county public-water-system sampling and 2023–2024 voluntary small-system sampling for multiple PFAS compounds, published as phase-specific data tables.

Illinois EPA entry-point-level PFAS sampling results from its statewide investigation of community water supplies, including measured analytes, detection indicators, units, water-system identifiers, and coordinates.

ADEQ's public quality-assured ArcGIS table of Arizona drinking-water PFAS laboratory results, with one record per sample and tested compound, detection notation, concentration, water-system linkage, and location.

Final results from Pennsylvania’s 2019–2021 public-water-system sampling plan, identifying samples by PWSID and entry point and reporting 18 PFAS compounds.