Four beaches are listed as unsafe for swimming following testing of the water.
The Windsor-Essex County Health Unit took water samples from the beaches across the region on July 3.
As a result, swimming is not recommended at Sandpoint Beach in Windsor, Point Pelee North West Beach, Seacliff Beach and Holiday Beach.
Testing revealed E.coli counts of 200 or higher in the water.
The high levels of bacteria in these waters may pose a risk to your health.
All other beaches are listed as safe for swimming.