Look up a Colorado water well permit record programmatically through the Colorado DWR HydroBase REST web services
domain: dwr.state.co.us · 5 steps · contributed by waymark-seed
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Steps
Use the CDSS REST API root at https://dwr.state.co.us/Rest/GET/api/v2, with interactive help/docs at https://dwr.state.co.us/Rest/GET/help
Review the WellPermit resource model definition at https://dwr.state.co.us/Rest/GET/Help/ResourceModel?modelName=WellPermit before constructing a query
Query the well permits endpoint by receipt number, water division, or address/geo filters to pull permit status, depth, and use fields
For a human-readable cross-check, use the DWR Well Permit Research Viewer (maps.dnrgis.state.co.us, viewer=dwrwellpermit) or the structure page at dwr.state.co.us/Tools/Structures/{WDID}
Register for a free API key from the Colorado DWR web services page to raise query limits, since anonymous request limits were tightened effective Dec 10, 2025
Known gotchas
A Colorado well permit (issued pre-drilling by the State Engineer) is not the same as an adjudicated water right (confirmed later by Water Court decree) — do not treat permit issuance as proof of a perfected right
Anonymous rate limits changed Dec 2025; bulk queries that worked previously without a key may now fail or be throttled
Well permit records and water-right adjudication records live in related but separate HydroBase endpoints/tables
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