Washington Water Science Center


This is your direct link to all kinds of water resource information. Here you'll find information on Washington's rivers and streams. You'll also find information about groundwater, water quality, and many other topics. The USGS operates the most extensive satellite network of stream-gaging stations in the state, many of which form the backbone of flood-warning systems.

Current Washington Water Conditions

Current Washington Water Conditions

Explore real-time Washington streamflow, groundwater, and water-quality conditions and access data with our new interactive map application.

Current Conditions


Date published: September 2, 2020

Lending a Hand During COVID-19: Maintaining a Streamgage on the Canadian Border

When USGS personnel were prevented from accessing one of our streamgages along the U.S.-Canadian border, the Water Survey of Canada stepped in to help clear debris from our streamgage and ensure it was collecting accurate data.

Date published: August 17, 2020

FLOwPER User’s Guide—For Collection of FLOw PERmanence Field Observations

USGS and USFS develop a mobile application field form for rapid collection of flow/no flow observations.


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Year Published: 2021

Beyond streamflow: Call for a national data repository of streamflow presence for streams and rivers in the United States

Observations of the presence or absence of surface water in streams are useful for characterizing streamflow permanence, which includes the frequency, duration, and spatial extent of surface flow in streams and rivers. Such data are particularly valuable for headwater streams, which comprise the vast majority of channel length in stream networks,...

Jaeger, Kristin; Hafen, Konrad; Dunham, Jason B.; Fritz, Ken M.; Kampf, Stephanie K.; Barnhart, Theodore B.; Kaiser, Kendra E.; Sando, Roy; Johnson, Sherri L; McShane, Ryan R.; Dunn, Sarah Beth

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Year Published: 2021

Nitrogen and phosphorus loads from groundwater to Lake Spokane, Spokane, Washington, October 2016–October 2019

Shallow nearshore groundwater and estimates of groundwater seepage were collected at 21 locations along the north and south shores of Lake Spokane beginning in October 2016 and ending in October 2019. Nitrate plus nitrite concentrations in nearshore groundwater ranged from <0.04 to 7.60 milligrams of nitrogen per liter. Nearshore groundwater...

Sheibley, Richard W.; Foreman, James R.
Sheibley, R.W., and Foreman, J.R., 2021, Nitrogen and phosphorus loads from groundwater to Lake Spokane, Spokane, Washington, October 2016–October 2019: U.S. Geological Survey Scientific Investigations Report 2021–5023, 34 p., https://doi.org/10.3133/sir20215023.

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Year Published: 2021

Inclusion of pesticide transformation products is key to estimating pesticide exposures and effects in small U.S. streams

Improved analytical methods can quantify hundreds of pesticide transformation products (TPs), but understanding of TP occurrence and potential toxicity in aquatic ecosystems remains limited. We quantified 108 parent pesticides and 116 TPs in more than 3 700 samples from 442 small streams in mostly urban basins across five major regions of the...

Mahler, Barbara; Nowell, Lisa H.; Sandstrom, Mark W.; Bradley, Paul; Romanok, Kristin; Konrad, Christopher; Van Metre, Peter