# Water Quality Portal (WQP) API

**Canonical:** https://apis.io/apis/usgs-water/water-quality-portal/  
**Provider:** USGS Water Services — https://apis.io/providers/usgs-water/  
**Base URL:** https://www.waterqualitydata.us/data/  
**Documentation:** https://www.waterqualitydata.us/webservices_documentation/

Water Quality Portal (WQP) API is one of 43 APIs that [USGS Water Services](https://apis.io/providers/usgs-water/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Water Quality, EPA, Chemistry, Biology, and Monitoring. The published artifact set on APIs.io includes API documentation.

A cooperative service sponsored by USGS and EPA providing access to water quality data from over 400 agencies including USGS NWIS and EPA WQX. Endpoints cover monitoring sites, chemistry results, biological metrics, activity data, and detection limits. Supports spatial, temporal, characteristic, and organizational filters. Output formats include CSV, TSV, XLSX, XML, GeoJSON, KML, and KMZ.

## Machine-readable artifacts (2)

- **Documentation** — https://www.waterqualitydata.us/webservices_documentation/
- **Website** — https://www.waterqualitydata.us/

## Other USGS Water Services APIs (12)

- [USGS Instantaneous Values Service](https://apis.io/apis/usgs-water/instantaneous-values/)
- [USGS Daily Values Service](https://apis.io/apis/usgs-water/daily-values/)
- [USGS Site Service](https://apis.io/apis/usgs-water/site-service/)
- [USGS Statistics Service](https://apis.io/apis/usgs-water/statistics-service/)
- [USGS Groundwater Levels Service](https://apis.io/apis/usgs-water/groundwater-levels/)
- [USGS Water Data Statistics API](https://apis.io/apis/usgs-water/statistics-next-gen/)
- [USGS Water Services agency-codes API](https://apis.io/apis/usgs-water/usgs-water-agency-codes-api/)
- [USGS Water Services altitude-datums API](https://apis.io/apis/usgs-water/usgs-water-altitude-datums-api/)
- [USGS Water Services aquifer-codes API](https://apis.io/apis/usgs-water/usgs-water-aquifer-codes-api/)
- [USGS Water Services aquifer-types API](https://apis.io/apis/usgs-water/usgs-water-aquifer-types-api/)
- [USGS Water Services channel-measurements API](https://apis.io/apis/usgs-water/usgs-water-channel-measurements-api/)
- [USGS Water Services citations API](https://apis.io/apis/usgs-water/usgs-water-citations-api/)

## Tags

Water Quality, EPA, Chemistry, Biology, Monitoring, Multi-Agency

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