The Cherry Creek State Park swimming area reopened Saturday afternoon after tests showed bacteria in the water had disappeared.
Colorado Parks and Wildlife closed the swimming area Thursday afterward high levels of E.coli were detected.
Parks employees test the water in the state’s swimming areas daily, and the Cherry Creek park lake was cleared for swimming on Saturday after bacteria levels dropped to safe levels, which have been set by the Colorado Department of Public Health and Environment , according to a CPW tweet.
Swimming at Chatfield State Park reopened Friday after a brief closure due to high levels of E.coli in the water.
Parks officials said the high bacteria levels could be caused by fecal waste from wildlife, runoff from urban areas or excessive runoff from rain. The park has had a lot of rain this year.
Get more Colorado news by signing up for our daily Your Morning Dozen email newsletter.