# USGS Water Data OGC API

**Canonical:** https://apis.io/apis/u-s-geological-survey/usgs-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 OGC API is one of 11 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. This API exposes 3 JSON Schema definitions. Tagged areas include OGC, OGC API, OGC API Features, CQL2, and GeoJSON. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, a JSON-LD context, authentication docs, and 3 JSON Schemas.

The USGS Water Data OGC API — a conformant OGC API - Features implementation over the national water observation network, exposing 36 collections (monitoring locations, continuous and daily values, field and channel measurements, peaks, time-series metadata, and the full USGS reference-code vocabulary) as GeoJSON with CQL2 filtering. Verified anonymously on 2026-08-20: the landing page, /conformance and /collections each returned HTTP 200, and the first-party OpenAPI 3.0.2 (184 paths, 220 operations, "USGS Water Data APIs" v0.71.7) is served live and without a key at /openapi?f=json. The conformance declaration names 18 classes across OGC API - Common parts 1-3, OGC API - Features parts 1-4, and CQL2. This replaces an earlier catalog entry that described these OGC operations but pointed at earthquake.usgs.gov/fdsnws/event/1, where /collections soft-404s to an HTML documentation page.

## Machine-readable artifacts (13)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/openapi/u-s-geological-survey-water-data-ogc-api-openapi.yml
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/conformance/u-s-geological-survey-conformance.yml
- **Documentation** — https://earthquake.usgs.gov/fdsnws/event/1/
- **GettingStarted** — https://earthquake.usgs.gov/earthquakes/feed/
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
- **JSONLD** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
- **Examples** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
- **Documentation** — https://api.waterdata.usgs.gov/docs/
- **Authentication** — https://api.waterdata.usgs.gov/signup/
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
- **JSONLD** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
- **Examples** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json

## Other U.S. Geological Survey APIs (10)

- [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/)

## Tags

OGC, OGC API, OGC API Features, CQL2, GeoJSON, Geospatial, Water, Hydrology, Open Access

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/u-s-geological-survey/usgs-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/.