# USGS Groundwater Levels Service

**Canonical:** https://apis.io/apis/usgs-water/groundwater-levels/  
**Provider:** USGS Water Services — https://apis.io/providers/usgs-water/  
**Base URL:** https://waterservices.usgs.gov/nwis/gwlevels/  
**Documentation:** https://waterservices.usgs.gov/docs/groundwater-levels/groundwater-levels-details/

USGS Groundwater Levels Service 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 Groundwater, Water Levels, Wells, Aquifers, and Historical. The published artifact set on APIs.io includes API documentation.

Provides historical manually-recorded groundwater level measurements from USGS wells and monitoring sites. Returns depth-to-water and water-level-above-datum values in JSON or RDB format. For automated real-time groundwater data, the Instantaneous Values Service should be used.

## Machine-readable artifacts (2)

- **Documentation** — https://waterservices.usgs.gov/docs/groundwater-levels/groundwater-levels-details/
- **Website** — https://waterservices.usgs.gov/

## 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/)
- [Water Quality Portal (WQP) API](https://apis.io/apis/usgs-water/water-quality-portal/)
- [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

Groundwater, Water Levels, Wells, Aquifers, Historical

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