The CRD has issued a wastewater discharge notice along a shoreline in Oak Bay, Saanich, Cadboro Bay, and McNeill Bay on Sunday night.
Heavy rain caused combined stormwater and wastewater overflows.
The warning comes after heavy rainfalls Sunday which resulted in combined stormwater and wastewater overflows along some shorelines in Greater Victoria between Tarn Place and Seaview Road, and Trafalgar Park and Radcliffe Lane.
Residents are advised to avoid entering the waters along the affected shorelines, as the wastewater may pose a health risk.
Public health advisory signs were posted at beaches in the affected areas and will remain there until enterococci levels dropped below the permitted recreational limit.
“As a precaution and in consultation with Island Health and the local municipalities, beaches within the affected areas will be posted with public health advisory signs until sample results indicate enterococci levels are below the 70CFU/100mL recreational limit,” the CRD said in a statement.