The database will be unavailable for several hours on Saturday, January 10th, 2026, for system upgrades starting 10am Pacific.

DART Hourly Water Quality Graphics

Data Courtesy of U.S. Army Corps of Engineers, NWD and Grant County PUD, U.S. Geological Survey Water Data, U.S. Bureau of Reclamation Columbia-Pacific Northwest Region Hydromet

Hourly Water Quality Queries

Select Year, Site, River Parameter

The year following the site indicates earliest data available.

Set Date and Hours

mm/dd
Query Notes