UPDATE: Boil Water Advisory Lifted

Update 2:56 p.m. Monday: Town Officials say the Boil Water Advisory has been lifted for Town of Vienna Water customers.

Two rounds of bacteriological testing performed by the City of Falls Church
Water Authority came back negative, the town said in a statement.

Residents and businesses no longer need to boil water and can safely consume and cook with tap water.

Original 6 a.m.: Boil Water Advisory In Effect Through Monday Night

All customers of Town of Vienna Water -- including all households within the Town of Vienna corporate limits -- remain under a through Monday night, the town said in a statement Sunday night. 

Customers are advised not to drink tap water without boiling it first. Failure to follow this advisory could result in stomach or intestinal illness, the town said.  
 
The precaution comes after a drop in water pressure Saturday in the Tysons and Vienna area of the Falls Church City water system, which supplies the town with its drinking water. The issue increases the likelihood of contaminants entering the water pipes in Vienna's water distribution system, the town said.
 
The Boil Water Advisory will remain in effect through Monday night to allow for
proper testing.  Vienna water customers should plan to continue water boiling methods until the advisory is lifted.
 
This advisory does not apply to customers of Fairfax Water, which is operating normally.

Boil Instructions from the Town:
Boiled or bottled water should be used for drinking, beverage and food preparation, and making ice until further notice. Boiling kills bacteria and other organisms in the water. Boiling is the preferred method to assure that the tap water is safe to drink. Bring all tap water to a rolling boil, let it boil for one (1) minute, and let it cool before using, or use bottled water.  
 
Alternative Method 
An alternative method of purification for water customers that do not have gas or electricity available is to use liquid household bleach to disinfect water. The bleach product should be recently purchased, free of additives and scents, and should contain a hypochlorite solution of at least 5.25 percent. Public health officials recommend adding eight drops of bleach (about ¼ teaspoon) to each gallon of water. The water should be stirred and allowed to stand for at least 30 minutes before use. Water purification tablets may also be used by following the manufacturer’s instructions.