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: December 21, 2018

A Spatially Continuous Model of Annual Streamflow Permanence Throughout the Pacific Northwest

An interdisciplinary team comprised of USGS and university scientists has developed the Probability of Streamflow Permanence Model or PROSPER which predicts flow permanence for unregulated and minimally impaired streams in the Pacific Northwest.

Date published: November 1, 2017

New USGS Study Tracks Millions of Tons of Rocks, Gravel and Silt Carried by the Sauk River

TACOMA, Wash. — The U.S. Geological Survey recently published the results of a new five-year suspended-sediment and water temperature study from the Sauk River. The purpose of this study is to improve understanding of the magnitude and timing of suspended sediment from the Sauk River and its tributaries to the Skagit River.

Date published: February 13, 2017

New USGS Field Method is a Breakthrough for Contaminant Analysis in Water Samples

The U.S. Geological Survey published a new report highlighting a portable continuous-flow centrifuge which aims to save time and money on contaminant analysis of particles suspended in water samples.


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Year Published: 2020

Spectral analysis to quantify the response of groundwater levels to precipitation—Northwestern United States

Persistent atmospheric patterns that lead to wet and dry seasons and droughts over periods of months to decades and longer-term climate change over periods of decades to millennia affect groundwater resources. Changes in groundwater storage and the resulting groundwater discharge from most aquifers is relatively slow and steady compared to the...

Long, Andrew J.; Konrad, Christopher P.

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Year Published: 2020

Microplastic concentrations in two Oregon bivalve species: Spatial, temporal, and species variability

Microplastics are an ecological stressor with implications for ecosystem and human health when present in seafood. We quantified microplastic types, concentrations, anatomical burdens, geographic distribution, and temporal differences in Pacific oysters (Crassostrea gigas) and Pacific razor clams (Siliqua patula) from 15 Oregon coast, U.S.A. sites...

Baechler, Britta; Granek, Elise F.; Hunter, Matthew G.; Conn, Kathleen E.

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Year Published: 2019

Assessment of existing groundwater quality data in the Green-Duwamish watershed, Washington

The United States Geological Survey (USGS) provided technical support to the Washington Department of Ecology (Ecology) in their assessment of the role groundwater plays in contributing pollutant loading to the Green-Duwamish River near Seattle, Washington. Ecology is developing watershed hydrology models of the Green-Duwamish watershed, and need...

Senter, Craig A.; Conn, Kathleen E.; Black, Robert W.; Welch, Wendy B.; Fasser, Elisabeth T.
Senter, C.A., Conn, K.E., Black, R.W., Welch, W.B., and Fasser, E.T., 2020, Assessment of existing groundwater quality data in the Green-Duwamish watershed, Washington: U.S. Geological Survey Open-File Report 2019-1131, 35 p., https://doi.org/10.3133/ofr20191131.