Illinois DNR ecological consultation parcels, Natural Area Inventory, Nature Preserves + Land/Water Reserves, and E&T species habitat via geoservices3.dnr.illinois.gov. 5 curated layers across ecocat + ecocatpro. - searchNaturePreserves ⭐ 740 INPC preserves + L/W reserves (McCune Sand Prairie LWR149, ...) - searchNaturalAreaInventory ⭐ 1.5K INAI sites (categories I-VII; Bohm Woods, ...) - searchEndangeredSpeciesHabitat ⭐ 5.3K E&T species polygons - searchEcoConsultations 217.5K parcels (8 PROGRAM values) §0: 6 of 10 root folders (Forestry, heritage, IRAP, LIDAR, OREP) are EMPTY. ecocatpro objectIdField=null but pagination works with explicit orderBy. Mangled fields — site name at MANAGED__6.
5 methodsFreshness not declaredIllinois EPA site remediation, leaking USTs, landfills, brownfields, and federal-facility cleanup via geoservices.epa.illinois.gov. - searchSiteRemediation ⭐ ~6.6K SRP cleanup sites with County + SiteType (64 distinct) - searchLeakingUST ⭐ ~31.3K LUST sites — NO county column upstream - searchLandfills ⭐ ~1041 landfills across 6 status-typed layers - searchBrownfields, searchFederalFacilities, getServiceInfo §0: Environmental/LeakingUST and Environmental/IEPA_BOL_SiteRemediationProgram are DEAD (layers=[], 500s). Live equivalents: Land/LeakingUST, Land/SrpSites. FederalFacilities canonical is layer 1 (parent 0 is group). Active 0/1 ↔ SiteActive Yes/No same partition. All four services in EPSG:4326.
6 methodsFreshness not declaredIllinois State Geological Survey (ISGS) ILOIL well registry plus oil/gas/storage field polygons and waterflood-area boundaries via maps.isgs.illinois.edu. - searchWells ⭐ ~207K wells with API, status code+text, operator, formation, depth - searchOilGasFields ⭐ ~1K canonical 2024 unified oil + gas + gas-storage polygons (or ~550 legacy) - getWellByApi single well lookup, searchWaterfloodAreas, getServiceInfo §0 spec drift: brief listed Oil_Gas_GasStor_Fields_2023 — that service is 404. Canonical service is _2024. Wells layer is at index 8 of Wells/MapServer (NOT 0). STATUS column has 100+ codes; STATUS_TEXT has 100+ descriptive variants. Legacy service uses upper-snake fields, 2024 uses camelCase. Native CRS 102100; outSR=4326.
5 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: illinois