Beach Water Testing

Beach Water Testing:

To assess and assure water quality of swimming beaches owned and operated by Fond du Lac County, Wolf Lake Beach is tested regularly for high E.coli levels during the swimming season. 

Beach Advisory:

A beach advisory sign is posted whenever the level of E.coli exceeds 235 CFU/100 mL. The beach advisory sign is removed when the levels of E. coli are below 235 CFU/100mL in two samples, each collected on separate days.

Beach Closure:

A beach closure sign is posted whenever the amount of E. coli exceeds 1000 CFU/100mL. The beach will be reopened when the levels of E.coli are below 1000 CFU/100mL in two samples, each collected on separate days.


What is E. coli?

E. coli is a type of bacteria that lives in your digestive system, that normally doesn’t cause any illness. But, when E. coli is present in high levels or when different kinds of the bacteria are present, people can get very sick. Symptoms of an E. coli infection are diarrhea, stomach cramps and pain, and nausea or vomiting

Elevated E. coli readings increase swimmers risk of developing an E. coli infection, leading to diarrhea, stomach cramps and pain, and nausea or vomiting. 


Healthy Swimming
Safe Swimming Brochure

2019 - E.coli Readings for Wolf Lake Swimming Beach:

 Date Location
 05/31/2019 Center   61  safe
 06/05/2019 South   0  safe
 North  0  safe
 06/12/2019 South  137   safe
   North  120  safe
 06/19/2019  South   41  safe
   North  2  safe
 6/26/2019  South  20  safe
   North  33  safe
 7/2/2019  South  18  safe
   North  14  safe
 7/10/2019 South   0  safe
   North  0  safe
 7/15/2019  South  8  safe
   North  3  safe
7/24/2019   South  7  safe
   North  11  safe
 7/31/2019  South  4  safe
   North  21  safe
 8/6/2019  South  6  safe
   North  6  safe


 4  safe
   South  19  safe
 8/29/2019  North   6   safe
   South  0  safe 



















(CFU=colony forming units)

Health Department Located at the City/County Government Center on the 3rd floor

Office Hours: 8:00am – 4:30pm Monday through Friday (except legal holidays)
Phone: 920-929-3085
Fax: 920-929-3102
Email: Click here


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