Boil water advisory lifted in Fairfax County after valve failure – NBC4 Washington


Residents in part of Fairfax County no longer need to boil their water, after authorities reported a problem with the system on Saturday.

Fairfax Water said Monday that a boil water advisory has ended for the Hiddenbrook area. About 1,900 homes, 4,500 residents and two schools were affected.

The advisory was issued on Saturday after a valve failure depressurized a section of the water distribution system. Customers were asked to boil any water used for drinking, brushing teeth, and watering plants.

“The boil water advisory was issued out of caution due to a loss of pressure in the system, not a water quality issue,” Fairfax Water said in a statement Monday.

Water quality testing over the weekend found that the water directed to Hiddenbrook customers met all regulatory standards. No water quality issues were identified by the Virginia Department of Health’s office of drinking water, which tested samples for bacteria and chlorine levels.

Residents were advised to run their faucets for five minutes to flush the system and drain their ice makers.

People served by Fairfax Water outside the Hiddenbrook area or the town of Herndon have not been affected by the valve problem, the utility said.

Here is a map showing the affected area.

Map of the affected area as of Saturday, November 13, 2021. Fairfax Water said the affected area is in parts of Fairfax County “bounded by Folly Lick Stream Valley to the east and the border between Fairfax County and Loudoun County in the west, and stretching from Clearview Elementary School in the south to Woodson Drive in the north.


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