data api · United States

USGS Water Data API

USGS water observations and monitoring-location metadata through modern water-data APIs.

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What's in it

Data offered docs-verified: continuous sensor measurements · daily values · time series metadata · monitoring-location metadata · water quality samples · discrete water-quality data (Water Quality Portal) · gaging-station imagery (NIMS) · daily, monthly and annual statistics
Coverage llm-inferred: United States
Formats docs-verified: OGC API · STAC
Access docs-verified: Free to use; API key optional for higher rate limits. Licence not stated.

Useful for

Use cases llm-inferred: Baseline river flow and gauge record review for FRA inputs from nearest USGS gauge (US sites only) · Flood event analysis from continuous sensor records at gauged catchments · Water quality baseline sampling review for environmental assessment (US sites only) · Gauge camera imagery for site visit verification and condition checks
Audience llm-inferred: flood consultants · hydrologists · GIS analysts · environmental scientists · water quality specialists

Limitations

Constraints llm-inferred: Covers United States monitoring locations only; not applicable to UK sites · Rate limits apply without an API key · Licence not specified in catalogue metadata · Multiple API families (OGC, STAC, legacy Water Services, NIMS) may require different query patterns · NIMS imagery requires constructing full image URLs from camera base paths and returned filenames

Licence: Unknown — check provider terms
Authentication: Unknown — review source docs
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 14/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Public page checked: HTTP 200. Licence/auth left null where not established.

Metadata observed 14/10/2026 · editorial seed