USGS NWIS Streamflow & Gage Height Monitor API by Site/State

USGS NWIS streamflow API: pull real-time river discharge (cfs) and gage height (ft) by site number or state. Flattens nested USGS WaterML-JSON into clean rows with change deltas and flood-stage threshold alerts. Keyless USGS Water Services data for irrigation, utilities, flood risk & hydrology.

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Key figures30 readings

Price / 1k$6.00per 1,000 results

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Users / 30d30 readings

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2026-08-30schemaInput schema changed—on record
2026-08-30contentREADME updated+10,117 characters+10,117characters
2026-08-12changeIcon replaced—on record

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