Boil Water Advisories

A boil water advisory is a precautionary measure advising people to boil their tap water before using it.

Boil water advisories are issued after an event that could allow contaminants to enter the water distribution system. Such events include a large water main break, a widespread loss of system pressure, or a natural disaster. 

Charleston Water System rarely issues boil water advisories. This is because in most cases, our crews can isolate a damaged water main by closing the nearest valves, then repairing the pipe, disinfecting it, and flushing it before putting it back into service. This prevents contamination from soil and bacteria, which is why boil water advisories are not issued after most routine water main repairs. 

How will I know if a boil water advisory is issued?
We will notify the media, post information on this website and our phone system, and take other appropriate notification measures, such phone calls and electronic sign boards.

For more information, check out the FAQs below or visit the SC Department of Health and Environmental Control web site.