Portage County beaches are sampled for the presence of E. coli bacteria throughout the swimming season from Memorial Day to Labor Day. In the event that bacteria levels are elevated above 235 cfu/100 ml, established by the U.S. Environmental Protection Agency as an increased health risk to swimmers, an advisory sign will be posted at that beach. Swimming is allowed, but caution is recommended. In the event that bacteria levels are at an unsafe level of 1,000 cfu/100 ml, a Beach Closure sign will be posted and swimming is not recommended.
Samples are tested same day as collection by the Water and Environmental Analysis Lab at the University of Wisconsin – Stevens Point.
In the event that an advisory or closure sign is posted at the Portage County beach, that beach will be re-tested and the advisory or closure will be lifted once E.coli bacteria levels are below the EPA standard of 235 cfu/100 ml.
For more information on beach health safety, please visit the Wisconsin Beach Health website.
2019 Sampling Results
Please click on each date below to see the results.