# USGS Instantaneous Values Service

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

USGS Instantaneous Values 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 Real-Time, Streamflow, Gage Height, Water Parameters, and Time Series. The published artifact set on APIs.io includes API documentation.

Provides near real-time water data — streamflow, gage height, temperature, specific conductance, and hundreds of other parameters — from thousands of USGS monitoring sites. Values are typically recorded every 15 minutes and transmitted hourly. Data is available from October 1, 2007 onwards and is marked provisional until reviewed.

## Machine-readable artifacts (3)

- **Documentation** — https://waterservices.usgs.gov/docs/instantaneous-values/instantaneous-values-details/
- **Website** — https://waterservices.usgs.gov/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/usgs-water/refs/heads/main/apis.yml

## Other USGS Water Services APIs (12)

- [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/)
- [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

Real-Time, Streamflow, Gage Height, Water Parameters, Time Series

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