USGS Water Services API
Science & Math · Operational · 30d uptime 100%
Water quality and level info for rivers and lakes
Trust signals
Pricing
FREE
Auth
NONE
CORS
Yes
Rate limit
No documented rate limits
Health
465ms
Trust score
91 (A)
Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Excellent production-readiness signals.
Links
- Homepagewaterservices.usgs.gov
- Documentationwaterservices.usgs.gov/
- Base URLwaterservices.usgs.gov/
Integration checklist
- Auth is NONE
- CORS enabled — callable directly from browsers.
- Rate limit: No documented rate limits