USGS Water Data APIs
Machine-readable REST access to US streamflow, groundwater, and water-quality monitoring data.
USGS Water Data APIs is listed in Government & Science.
Auth No auth Pricing Free URL https://www.usgs.gov/products/web-tools/apis Docs https://api.waterdata.usgs.gov/
Key metrics
Fair use Rate limit Free and keyless; no hard published rate limit (fair use; bulk requests should be paginated).
Gotchas
No gotchas documented yet. Contribute one if you know a constraint we missed.
Labels
- No auth
No auth
Callable with no API key or login — lowest-friction to integrate.
water hydrology usgs environment monitoring