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Protecting Water Quality Starts with Science

USGS hydrologist prepares a profiler to sample water quality in Brownlee Reservoir
USGS hydrologist prepares a profiler to sample water quality in Brownlee Reservoir

From the Coeur d'Alene River basin in the panhandle to the Idaho National Laboratory in the southeast, we work with Federal, state, local, tribal, and private sector partners to monitor and study the quality of Idaho's water resources.

We also provide real-time water-quality data from monitoring sites throughout Idaho.


Monthly Hydrologic Update

June 2016 Idaho Hydrologic Update

Our monthly Idaho Hydrologic Update helps you stay informed about Idaho's water resources. Each month, we summarize significant findings from our hydrologic data networks; announce new studies; and let you know how we support our local, state, Federal, and tribal partners with reliable, unbiased science.

Download our latest update.

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Browse previous updates.

Current Streamflow Conditions

Today's streamflow conditions. Click to see more real-time data.

Centennial Streamgages

More than two dozen Idaho streamgages offer more than 100 years of water data. Click the Centennial Streamgage badge below to access data from these streamgages.


Idaho's centennial streamgages with more than 100 years of recorded data

Latest Publications

Groundwater-flow model for the Wood River Valley aquifer system, south-central Idaho

Report cover. Click to read report.

USGS and Idaho Department of Water Resources hydrologists collaboratively developed a new groundwater-flow model for the Wood River Valley aquifer system. With the model, resource managers can simulate how increased or decreased pumping from the aquifer system or changes in precipitation and climate would affect groundwater levels and area streams.

Estimating peak-flow frequency statistics for selected gaged and ungaged sites in naturally flowing streams and rivers in Idaho

Report cover. Click to read report.

The U.S. Geological Survey, in cooperation with the Idaho Transportation Department, updated regional regression equations to estimate peak-flow statistics at ungaged sites on Idaho streams using recent streamflow data and new statistical techniques. The updated equations will be integrated in the U.S. Geological Survey StreamStats program to allow users to estimate basin and climatic characteristics and peak-flow statistics.