Inland Water Sampling

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Lake Poygan Boat Landing

Date Sampled E. coli Results
2014-08-18 4.1
2014-08-04 37.9
2014-07-28 7.5
2014-07-21 1
2014-07-15 56.1
2014-07-07 101.7
2014-06-30 46.5
2014-06-23 5.2
2014-06-17 201.4
2014-06-10 21.6
2014-06-02 435.2
2014-05-27 65
2013-08-14 47.9
2013-08-06 6.3
2013-07-29 7.3
2013-07-22 2
2013-07-15 1
2013-07-08 275.5
2013-07-01 18.1
2013-06-24 15.8
Image of Lake Poygan Boat Landing
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.