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Idaho Part of Regional Drought Study

USGS hydrologic technician measuring low streamflow
USGS hydrologic technician measuring low streamflow

The USGS is collecting streamflow, water temperature, and other data from rivers and streams to document the severity of this year’s drought across six western states, including Idaho. The goal of the study is to assess how warmer winter temperatures, reduced mountain snowpack, and a shift in precipitation from snow to rain may affect future water availability.


Monthly Hydrologic Update

February 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.

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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

Sediment transport and evaluation of sediment surrogate ratings in the Kootenai River near Bonners Ferry, Idaho, Water Years 2011–14

Report cover. Click to read report.

Sediment promotes natural river processes that can create habitat and food for fish. However, too much sediment settling in the critical spawning habitat of the endangered Kootenai River white sturgeon can smother the fish's eggs. Our sceintists estimated sediment transport in the river using both traditional sampling and acoustic technology.

Occurrence and transport of selected constituents in streams near the Stibnite mining area, Central Idaho, 2012–14

Report cover. Click to read report.

In this report, hydrologist Alexandra Etheridge analyzed water-quality data that showed high levels of arsenic, antimony, and mercury. She also developed regrression models that identified sources of contaminants. The work, conducted in cooperation with the Idaho Department of Lands and Midas Gold, will let resource managers estimate concentrations of arsenic and antimony in real time.