Retrieve Colorado groundwater water-level data via the DWR HydroBase REST API
domain: dwr.state.co.us · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
List wells with recorded water-level data via GET https://dwr.state.co.us/Rest/GET/api/v2/groundwater/waterlevels/wells?county=<county>&format=json.
Pull the actual level measurements for a well with api/v2/groundwater/waterlevels/wellmeasurements, filtered by the well identifier returned from the wells endpoint.
Use dateFormat (e.g. dateOnly, spaceSeparated, tSeparated) to control how timestamps render in the response.
Combine min-/max- range filters (e.g. min-measurementDate=...) with the wells/wellmeasurements query to bound results by date.
Request format=geo if you need GeoJSON geometry for mapping well locations, keeping in mind GeoJSON isn't guaranteed for every dataset.
Known gotchas
The wells and wellmeasurements endpoints are separate calls - there's no single call returning both a well's metadata and its full measurement history; join them client-side on the shared well identifier.
The same anonymous rate limits apply here (1,000 calls/day, 600,000 rows/day) as on every other CDSS REST endpoint - batch date ranges rather than looping per-well per-day.
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