# USGS Water Data APIs

**Canonical:** https://apis.io/apis/u-s-geological-survey/water-data-ogc-api/  
**Provider:** U.S. Geological Survey — https://apis.io/providers/u-s-geological-survey/  
**Base URL:** https://api.waterdata.usgs.gov/ogcapi/v0  
**Documentation:** https://api.waterdata.usgs.gov/docs/

USGS Water Data APIs is one of 47 APIs that [U.S. Geological Survey](https://apis.io/providers/u-s-geological-survey/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Water, Geospatial, OGC, and OGC API Features. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The USGS Water Data OGC API — an OGC API Features service declaring 18 conformance classes, including OGC API Common Parts 1-3, Features Parts 1-4 and CQL2 filtering, and serving 37 collections. Verified live 2026-08-30: /conformance returns the class URIs, /collections returns 37 entries, and the landing page advertises a first-party OpenAPI 3.0.2 with 189 paths at its service-desc link. A control path on the same host returns 404, so the host discriminates and the 200s are evidence rather than a catch-all. The live /conformance endpoint is NOT registered as a property: `Conformance` is the local artifact type (5,889 providers use it for conformance/*.yml on disk), and there is no pointer class meaning a live OGC conformance endpoint. That gap is roadmap#80's failure mode 3, and overloading an existing type to work around it would hide the gap rather than record it. The classes are captured in conformance/ with their source URL.

## Machine-readable artifacts (4)

- **OpenAPI** — https://api.waterdata.usgs.gov/ogcapi/v0/openapi
- **ConformanceEndpoint** — https://api.waterdata.usgs.gov/ogcapi/v0/conformance
- **Documentation** — https://api.waterdata.usgs.gov/docs/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/apis.yml

## Other U.S. Geological Survey APIs (12)

- [Asset Identifier Service (AIS)](https://apis.io/apis/u-s-geological-survey/asset-identifier-service-ais/)
- [Seismic Design Web Service](https://apis.io/apis/u-s-geological-survey/seismic-design-web-service/)
- [ScienceBase](https://apis.io/apis/u-s-geological-survey/sciencebase/)
- [StreamStats Web Services](https://apis.io/apis/u-s-geological-survey/streamstats-web-services/)
- [USGS Water Services (Legacy)](https://apis.io/apis/u-s-geological-survey/usgs-water-services/)
- [U.S. Geological Survey Catalog API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-catalog-api/)
- [U.S. Geological Survey Earthquakes API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-earthquakes-api/)
- [U.S. Geological Survey Monitoring Locations API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-monitoring-locations-api/)
- [U.S. Geological Survey Reference Data API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-reference-data-api/)
- [U.S. Geological Survey Time Series Data API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-time-series-data-api/)
- [U.S. Geological Survey Agency Codes API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-agency-codes-api/)
- [U.S. Geological Survey Altitude Datums API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-altitude-datums-api/)

## Tags

Water, Geospatial, OGC, OGC API Features

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/u-s-geological-survey/water-data-ogc-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/u-s-geological-survey/.