About 95,000 Pennsylvania American Water customers, including those in select Allegheny County communities, may be boiling their water for days after an advisory was issued Saturday, a company spokesman said.

A power surge early Saturday morning depleted water storage at a tank in Washington County, the water company said in a statement. The loss of positive pressure within the company’s distribution system puts the water at risk for contamination.

Affected customers should use bottled water or boil their water before use.

Water should be brought to a rolling boil, boiled for one minute and cooled before consumption or use — for cooking, making ice, washing dishes or brushing teeth, according to the water company. Consumption of inadequately treated water can result in nausea, cramps, diarrhea and headaches.

It can take several days for the advisory to be lifted, company spokesman Brent Robinson said.

“Water samples must be collected to test for bacteria in the distribution system,” he said. “The first samples are taken on the day when the issue has been corrected, and then another set of samples are taken in the next 24 hours. Two consecutive days of ‘clean’ test results are required before (the state) will allow the advisory to be lifted.”

Pennsylvania American Water will alert customers when the advisory has lifted. For more information, visit pennsylvaniaamwater.com and select “Alerts” or call 800-565-7292.

Customers in the following municipalities are encouraged to boil their water before use until the advisory has been lifted:

Allegheny County

• Bethel Park

• Bridgeville

• Clairton

• Dravosburg

• Elizabeth Township

• Elizabeth Borough

• Glassport

• Jefferson Hills Borough

• Liberty

• Lincoln

• North Fayette

• South Fayette

• South Park

• Upper Saint Clair

• West Elizabeth

Washington County

• Amwell

• Buffalo

• Canonsburg

• Canton

• Caroll Township

• Cecil Township

• Chartiers

• City of Washington

• Claysville

• Cross Creek

• Donegal Township

• East Washington

• Fallowfield

• Finleyville

• Forward Township

• Green Hills Borough

• Houston

• Jefferson

• Monongahela

• Mount Pleasant

• New Eagle

• North Franklin

• North Strabane

• Nottingham

• Peters Township

• Somerset Township

• South Franklin

• South Strabane

• Union Township

• West Middletown

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