According to WIS on August 6th:

The City of Columbia Water Works advises the water customers of Chapin Elementary and Chapin Middle School, located in Lexington County, to vigorously boil their water for at least one full minute prior to drinking or cooking. Also, any residents near the affected area who have lost water and/or water pressure are also advised to vigorously boil their water for at least one full minute prior to drinking or cooking.

The City of Columbia has experienced an eight inch water main break. This could possibly result in bacterial contamination of the water at Chapin Elementary and Chapin Middle School. Water customers should continue to vigorously boil their water for at least one full minute prior to drinking or cooking until otherwise notified by the City of Columbia Water Works. Also, any ice made from water that has not been boiled should not be used for drinking purposes.

The City of Columbia Water Works is presently working to correct the problem.

All food processors and restaurants should comply with prescribed USDA and SC DHEC recommendations, respectively.