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⇱ USGS Water Data for the Nation

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Important for you to know:

  • Scheduled Maintenance Notice
    USGS will be performing maintenance on the time series data processing system beginning at 08:00 EST on April 2, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 3 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Water Data for the Nation

High-quality and discoverable water data for everyone
Over 135 years of water data from more than one million monitoring locations
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