Know your data sources.

Alabama Department of Environmental Management permits + UST + brownfields + Justice40 + complaints via gis.adem.alabama.gov. 5 curated layers from ADEM's 110+ MapServer catalog. - searchPermits ⭐ 83.7K AEPACS records across 42 categories (NPDES, MS4, air, UIC, scrap tire, CAFO, ...) - searchUSTSites ⭐ 10.3K UST facilities (FIPS or name) - searchBrownfields ⭐ 776 ADEM brownfield events - searchComplaints ⭐ 13K public complaints (AIR/COASTAL/LAND/WATER) - searchJustice40Tracts (655) §0: AEPACS uses ESRI_OID + duplicate object_id. UST has FIPS-only county. Brownfields County has DeKalb/De Kalb. CRS 26916; outSR=4326.

Kansas Department of Health and Environment spills + USTs + identified-sites cleanup list + environmental-interest finder via maps.kdhe.ks.gov/kdhe_doe. - searchSpills ⭐ 32K reported spill events (status, county, medium, cause, dates) - searchTanks ⭐ 17K AST+UST facilities (FAC_STATUS, district, county) - searchIdentifiedSites ⭐ 3.7K cleanup sites across 13 BER programs (Brownfields, Superfund, VCRA, ...) - searchEnvironmentalInterestSites 40K KEIMS programs (USTs, LUST, ISL, drycleaner, ...) §0: Legacy host maps.kdhe.state.ks.us is dead (TLS cert mismatch). BER/Spills_DASC FeatureServer publishes 0 layers — handler uses Spills_viewer_public/0. KEIF L1 has no county column, only city.

Mississippi Department of Environmental Quality MUSTER (UST + CERCLA) and 2024 Impaired Waters via opcgis.deq.state.ms.us. 5 curated layers covering petroleum tank sites, brownfield/CERCLA sites, 303(d) impaired waters, and completed TMDLs. - searchUSTSites ⭐ 11.9K active+inactive UST facilities - searchCERCLASites ⭐ 2.28K state CERCLA / brownfields with NPL flags - searchImpairedWaters ⭐ 233 streams + 4 polygons on the 2024 303(d) list - searchTmdlCompleted, getServiceInfo §0 caught: MUSTER does NOT support offset paging — handler iterates by OBJECTID. 5 scale-tier duplicate UST layers — only layer 10 exposed. BASIN column mixes UPPER and Title Case. POLLUTANT has numeric-prefix duplicates. Host has been historically flaky — handler retries once on 5xx/HTML.

Montana Department of Environmental Quality USTs + petroleum tank releases + MPDES water permits + air-quality monitoring + hazardous waste via gis.mtdeq.us/hosting. - searchUSTFacilities ⭐ 1.1K UST facility registry - searchTankReleases ⭐ 4.5K PTC cleanup events (Resolved/Open/Rescinded/Reopened) - searchWaterPermits ⭐ 2.7K MPDES discharge permits across 27 types - searchAirQualityMonitors ⭐ 21M hourly AQS readings (33 sites, PM25/O3/NO2/...) - searchHazardousWaste 3K RCRA generators §0: Native CRS 32100 (MT State Plane); outSR=4326. Host historically flaky — handler retries once. Most layers have NO county column (only Hazardous Waste does).