Our mission
USGS collects invaluable hydrological data, but the raw feeds can be hard to browse. WaterLevels.org bridges that gap with an interactive map, station pages, and recent history drawn directly from official monitoring stations.
Whether you are checking a local river, comparing nearby gauges, or exploring conditions across a state, the goal is the same: clear access to public water data with full attribution.
Data sources
Nearly all stream values come from the USGS Water Data APIs. Selected Reclamation reservoirs (such as Lake Mead) use daily elevations from USBR RISE. Selected Corps projects (such as Raystown Lake) use pool elevations from the USACE CWMS Data API. Selected NWPS gauges without a USGS site id publish observed stage from the National Water Prediction Service. Selected California reservoirs (such as Lake Oroville) use daily elevations from CDEC. Provisional readings can change as agencies review observations. For the authoritative record at any station, use the official agency page linked from each gauge.
Read our full data disclosures for what we show, how we cache updates, and important limitations.