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Flood Season Begins

Flooded highway and rest stop on Salmon Falls Creek near San Jacinto, NNV

Ice jams, rain, and snowmelt have caused flooding on rivers and streams throughout Idaho, eastern Oregon, and northern Nevada. Hydrographers from our Post Falls, Idaho Falls, and Boise field offices responded quickly to collect data and document high-water marks, to repair flooded streamgages, and to install emergency streamgages to provide additional data for emergency response managers.

With this year's abundant snowpack, flooding may occur throughout the spring runoff. You can track flows form any of our real-time streamgages on the web, by subscribing to USGS WaterAlert, or by texting or e-mailing a streamgage station number to the USGS WaterNow service.


Monthly Hydrologic Update

February 2017 Idaho Hydrologic Update

Our monthly Idaho Hydrologic Update enters its second year of keeping you 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

Ambient water quality in aquifers used for drinking-water supplies, Gem County, southwestern Idaho, 2015

Report cover. Click to read report.

The entire population of southwestern Idaho’s Gem County depends on aquifers for its drinking water. The results of our study conducted with Gem County and the Idaho Department of Environmental Quality show that the water in those aquifers is of generally good quality.

Borehole deviation and correction factor data for selected wells in the eastern Snake River Plain aquifer at and near the Idaho National Laboratory, Idaho

Report cover. Click to read report.

Well deviation is one component of water-level data that is often overlooked. If wells are not plumb, the deviation can affect the accuracy of water table elevation. Hydrologist Brian Twining analyzed well deviation survey data (gyroscopic and magnetic) to identify any deviation in 47 wells at the Idaho National Laboratory.