The Pennington County Office of Emergency Management is asking people to stay out of a particular area of Spring Creek.
Provisional test results indicate that there is a high level of E. coli present in an eight mile stretch of the river between the Hill City visitors center and Mitchell Lake in Hill City.
Any activity that allows water to be ingested or come into contact with eyes, ears, nose, mouth, or areas of skin with cuts should be avoided.
Fish meat cannot harbor E. coli; however, eating fish caught in the creek is not recommended, and that's why Robert Hawthorne decided to play it safe and throw back any fish he catches.
"It was a surprise to me," said Hawthorne. "I don't want to fish here, at least not fish and eat them. It is creepy knowing what E. coli is, it's bad.
Hand washing is encouraged before and after any recreating that occurs near the affected portion of spring creek.
For more information contact the Pennington County Emergency Management office at 394-2185.