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Data Show Northern Idaho Superfund Cleanup is Improving Water Quality

In 2004, the USGS, in cooperation with the EPA, established a water-quality monitoring network totaling 18 sites from Mullan to Post Falls, Idaho. USGS hydrologist Greg Clark analyzed water-quality data collected from October 2009 through September 2013. Clark also examined data dating back to the early 1990s to look for any long-term trends.

Read the news release.

Read more about the study.

South Fork Coeur d'Alene River near Kellogg, Idaho.
South Fork Coeur d'Alene River near Kellogg, Idaho.

New Scientific Study

Estimating Seepage Rates of Streams, Ponds, and Lakes at the Camas National Wildlife Refuge

Deer in wetland at Camas National Wildlife Refuge. Click to go to study Web site.
Learn more about our Camas National Wildlife Refuge seepage assessment.
Deer in wetland at Camas National Wildlife Refuge. Photo by Bill Schiess, used by permission.

Current Streamflow Conditions

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

Latest Publications

Sources, Transport, and Trends for Selected Trace Metals and Nutrients in the Coeur d’Alene and Spokane River Basins, Northern Idaho, 1990–2013o

Report cover. Click to read report.

In this report, hdyrologist Greg Clark analyzes water-quality data that the USGS has collected on behalf of the Environmental Protection Agency in and around the Bunker Hill Superfund site in northern Idaho. The data show that concentrations of three trace metals of concern—cadmium, lead, and zinc—have declined significantly since the 1990s.

Selenium in the Upper Blackfoot River Watershed, Southeastern Idaho, 2001–12

Report cover. Click to read report.

USGS and Idaho Department of Environmental Quality scientists combined and analyzed data sets from two separate water-quality monitoring efforts in the upper Blackfoot River basin in southeastern Idaho. Naturally occuring selenium washed into the river from phosphate mines has raised concerns about possible impacts to fish and other aquatic life forms in the basin, as well as grazing livestock.