USGS Water Data APIs (NWIS)
Streamflow, gage height, groundwater and water-quality time series for monitoring sites.
| Publisher | U.S. Geological Survey |
|---|---|
| Coverage | United States |
| Licence | LicenseRef-Public-Domain
Publisher's wording: Public domain |
| Themes | us-federal-hydrography, open-data-sources |
| Update cadence | Not stated |
| Formats | Not stated |
| Status | active |
| Last verified | Not stated |
| Notes | OGC API-Features endpoints |
| Recipe | Not stated |
| Related | Not stated |
Access endpoints
| Type | URL | Layer or index | Auth | Notes |
|---|---|---|---|---|
ogc-api-features | https://api.waterdata.usgs.gov/ogcapi/ | Not stated | none | Modernized Water Data APIs; they replace waterservices.usgs.gov, which USGS decommissions in the first quarter of 2027. |