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After wastewater discharge, E. Coli was found in some locations in Boysen Reservoir

There is an “increased disease risk” at some popular recreation sites in Boysen State Park and at Boysen Reservoir in Fremont County due to E. coli contamination from wastewater discharge upstream, the Wyoming Department of Environmental Quality reports.

However, the DEQ and the Federal Environmental Protection Agency say there does not appear to be a broader threat to the area’s drinking water supply.

The DEQ conducted testing for E. coli contamination after approximately 210,000 gallons of treated material The wastewater was discharged on May 31 from water treatment lagoons near Hudson to the Middle Fork Popo Agie River.

The agency discouraged people from swimming at some recreation sites in Boysen State Park.

“The results indicate an increased risk of disease for recreationists engaged in immersion or immersion-like activities such as swimming or water play in the Lake Side Area. The Lake Side Area is located on the south side of the Boysen Reservoir, near the US Highway 26 bridge,” according to a Friday statement from DEQ.

“Increased disease risk to recreationists was not observed further north at the reservoir at the Sandy Hills Campground, Fremont Bay Campground or Tough Creek Campground,” DEQ said.

Hudson is a small town about halfway between Riverton and Lander in Fremont County, and about 50 miles upstream from Boysen Reservoir.

The reservoir and state park are popular for camping, swimming, fishing, boating and other activities.

No report required from Hudson

Cowboy State Daily filed a public records request this week for a Sanitary Sewer Overflow (SSO) form filed by the City of Hudson as a result of the discharge.

However, no such form has been submitted, DEQ Public Information Supervisor Kimberly Mazza said in an email response to Cowboy State Daily.

“A Sanitary Sewer Overflow (SSO) is defined as the release of raw sewage affecting a water body of the United States due to the release of partial or untreated sewage from a municipal sewage collection system before it reaches a sewage treatment plant,” she says. saturated.

There was no raw sewage in the Hudson discharge, Mazza wrote.

“The increased discharge from the Hudson Wastewater Treatment Plant does not meet the criteria for an SSO because (1) the Hudson discharge was treated wastewater and not raw sewage and (2) the discharge occurred from the Hudson permitted wastewater treatment plant, and not the sewage collection system before it reaches the treatment plant,” she stated. “Therefore, the City of Hudson is not required to submit an SSO form to DEQ for this event.”

EPA says drinking water is safe

The federal Environmental Protection Agency also determined that there was no raw sewage, agency spokeswoman Marisa Lubeck wrote in an email response to a Cowboy State Daily request for information.

“EPA has assessed the potential impacts to public water systems downstream from this incident. There appear to be no concerns about contamination due to the high flows in the Popo Agie River and the locations of downstream groundwater wells,” Lubeck said.

“It is important to note that the wastewater released was treated and was not raw sewage. The quality of the water released was comparable to what is normally released, but in a higher than normal volume,” she added.

Mark Heinz can be reached at [email protected].

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