Louisiana DEQ water-quality datasets. AGOL Feature Services, no auth. - search303dImpairedWaters ⭐ — IR2020 subsegments where a designated use is Not Supported (303(d)) - searchSubsegmentsByUse ⭐ — same layer, any use-rating - searchWatershedBasins (12), searchAmbientMonitoringSites (~761 LEAU active), searchFishAdvisories (62) - getServiceInfo quirks: subsegments + flowlines have NO parish — use BASIN (12 names: ATCHAFALAYA / CALCASIEU / ...) or bbox. Use codes: PCR/SCR/FWP/DWS/ONR/OYS/AGR/LAL. Status: Fully Supported / Not Supported / Insufficient Data / Not a Use / No Data Collected. Fish Advisories' Parishes is free-text ("Calcasieu and Cameron"); LIKE-matched. Air emissions + hazardous waste are NOT published as LDEQ Feature Services.
6 methodsFreshness not declaredTexas Commission on Environmental Quality contamination, water, and air datasets. Public ArcGIS REST MapServer, no auth. Layers: - lpst (~30k Leaking Petroleum Storage Tanks) - pst (~19k active Petroleum Storage Tanks) - superfund (~170 state Superfund sites) - vcp (~3k Voluntary Cleanup), brownfield (~210), ihwca (~5.7k Industrial Hazardous Waste) - pws (~19k Public Water System wells), ww_outfall (~4.6k wastewater outfalls) - aqs (~230 air-quality monitoring sites) Counties stored UPPERCASE upstream; returned Title Case. PWS and AQS layers have no county field — pass bbox or near. getGroundwaterOverlay combines Edwards Aquifer + PGMA + GCDs in one call.
13 methodsFreshness not declaredWVDEP consolidated. Marcellus heart — EQT, Antero, Range, Southwestern. 11 services in one enterprise folder, 9 layers via 8 methods. - searchWells (~153K) ⭐ county (→FIPS), operator, status, wellType, formation, marcellus/horizontal flags - searchPermits ⭐ orderBy issuedate desc; permitType, yearFrom/To - searchAirEmissionSources (~2.6K), searchAbandonedMineLands (~10K), searchRemediationSites (VRP+SEMS), searchMiningReclamation (~11K), searchDamSafety (~395), searchWatershedAssessment (~34K 303d), getServiceInfo upstream quirks: county on wells = FIPS suffix (Wetzel='103'). marcellus 'y'/'n'/'u' string. Mining columns are type/per_status. SEMS columns 10-char truncated. AML status bracketed variants. Air/AML/VRP/Mining/Dam/Watershed have NO county column — bbox/near only.
9 methodsFreshness not declared
Knowledge
Know your data sources.
The public data contract for every source PatchOps exposes over MCP: provenance, freshness, coverage, caveats, and per-method schemas. Also available as JSON at /api/knowledge/data-sources.
tag: water-quality