The Regional District of Central Kootenay has issued a water quality advisory for Riondel after testing showed cloudiness in the supply.
Current water quality is rated as fair.
"While health risks are considered low, the RDCK and Interior Health recommend that children, the elderly, people with weakened immune systems, and anyone seeking additional protection drink boiled water or a safe alternative until further notice," the regional district said in a statement.
For these at-risk groups, water intended for drinking, washing fruits or vegetables, making beverages or ice, or brushing teeth should be boiled for one minute.
The regional district says it's taking steps to reduce the risk and the public will be notified when conditions change or the water quality improves.