Beach Lake Monitoring

This interactive site, developed in cooperation with the County Land and Water Conservation Department, allows users to select the access point they are interested in, click on an icon, and see the sample results for that location. A warning is posted whenever a sample result is above the EPA advisory level of 235 colony forming units per 100 milliliters of sample water (cfu/100 ml).

Most Recent Date Sampled Most Recent E. coli Results Location Name
2021-08-23 7.1 Asylum Point Park and Boat Landing
2021-08-23 2 Black Wolf Boat Landing
2021-08-23 9.8 Boom Bay Boat Landing
2021-08-25 12.7 Fresh Air Park
2021-08-23 16.9 Fritse Park
2021-08-23 45 Grundman Park Boat Landing
2021-08-23 4.1 Lake Butte des Morts Boat Landing
2021-08-23 177.5 Lake Poygan Boat Landing
2021-09-01 33.6 Menominee Park
2021-08-23 1 Village of Butte des Morts Boat Landing
2021-08-23 7.5 Village of Winneconne Park Swim Area
2021-07-26 14.6 Winnebago County Community Park Swim Area
WARNING E. coli results greater than or equal to 235 poses an increased risk of swimmer-related illness.
The US EPA has established an advisory level of 235 cfu/100 ml (cfu = colony forming units) for E. coli. Samples are taken on a weekly basis at all sample locations, except Menominee Park, which is sampled twice per week. Results are a snapshot of the E. coli values at the time of sampling. Conditions change daily. As a result, the bacteria count taken on a given day may not necessarily reflect the condition on subsequent days or even later that same day.