Tag: San Juan River

San Juan River: Mexican Hat
E. coli Monitoring 2019

Update July 25, 2019 The Division of Water Quality (DWQ) detected elevated levels of E. coli at Mexican Hat on May 23, 2019, during routine sampling. E. coli values reached 1203 Most Probable Number (MPN) per 100 mL, approximately three times higher than the health advisory threshold of >409 MPN per 100 mL. Subsequent sampling …

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San Juan River: Sand Island
E. coli Monitoring 2019

Update July 25, 2019 Additional sampling conducted on July 15, 2019, and July 17, 2019, showed E. coli levels well below the advisory threshold. Final sampling on July 25, 2019, confirmed continuing low E. coli levels. The health advisory was lifted on July 25, 2019. A health advisory for E. coli can be lifted after …

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DWQ's Ben Brown sampling the San Juan River.

A Look Back: On the Scene after the Gold King Mine Spill

By Christine Osborne This week, we take a look back at DEQ’s response to the Gold King Mine release two years ago.¬†On August 5, 2015, EPA contractors were clearing debris from the opening of the Gold King Mine near Silverton, Colorado, when the blockage gave way, releasing three million gallons of acid mine drainage into …

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Water Quality: Gold King Mine Spill Underscores Need to Fix Leaky Mines

By Donna Kemp Spangler People all across the nation were stunned and outraged when on Aug. 5, a breach at the Gold King Mine turned the Animas River near Durango, Colo., a bright mustard-orange color. Even more shocking was the fact that federal Environmental Protection Agency (EPA) contractors caused the disaster. It took a 3-million-gallon …

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