From Memorial Day to Labor Day, the Environmental Health Laboratory Technicians monitor beach water quality to ensure the health and safety of swimmers.

The lab tests for coliform bacteria, including E. coli, which can be harmful to health when ingested by humans and pets. If there are high levels of E. coli, it is likely that fecal matter is in the water, which may carry harmful bacteria, viruses, and other organisms that can cause illness.

We test the following beaches:
Beach Water Quality Reports
Before entering the beach, you will see a sign posted. Be sure to look at it because it will tell you if the beach is safe to swim in. See below for the three safety levels and recommendations according to the WI Department of Natural Resources:

SAFE: The beach is safe to swim in. 
ADVISORY: Swimming in the water could make you sick. Swim at your own risk.
CLOSED: There is too much E. coli to be considered safe for swimmers. Do NOT swim in the water. 

WI Department of Natural Resources Beaches Website

Beach Safety Tips

Scan Before you Swim

Frequently Asked Questions

Beach Closings and Advisory Map (DNR)

Blue-green algae (cyanobacteria) can produce poisons that can make people and animals sick. If you notice that the water appears, green, blue, red, or brown and looks foamy, do not swim or drink the water. When in doubt, stay out.

Scan Before you Swim
Staying Safe and Healthy in Wisconsin's Lakes
Protecting your Family from Harmful Algal Blooms