One Ashfield-Colborne-Wawanosh beach is considered unsafe for swimming heading into the Labour Day long weekend.
According to Huron Perth Public Health's Inspection team, Ashfield Park Beach is under a no-swim advisory after testing over the acceptable bacteria limit.
An unsafe swimming notice has been posted, as going in the water could expose people to bacteria that may cause diarrhea or infections.
Resampling results will be posted online on Saturday.
This is the final weekend the health unit will be conducting beach water sampling until next summer.
To get updates in 2027, follow their Instagram account.