What To Do After A Boil Water Advisory Has Ended

What To Do After A Boil Water
Advisory Has Ended
Resident – Checklist
When a homeowner is notified that the boil water advisory has ended and the drinking water supply is
safe, the following actions need to be taken before you consume the water.
1. FLUSH WATER
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Unscrew and remove the faucet aerator (screen)
Turn on each cold water faucet/tap slowly
Run cold water for five minutes
Clean and reinstall aerator
Faucet aerator
2. HOT WATER TANKS
To clear hot water pipes and water heater of untreated water:
 Run hot water only at all faucets and flush until water runs cool or typically for a minimum of:
o 15 minutes for a typical household 40 gallon hot water tank
o 30 minutes for a hot water tank greater than 40 gallons
 Hot water is then safe to use for washing of dishes, pots and pans, etc. by hand.
3. REPLACE FILTERS
Water filters that are commonly used in refrigerators, faucets, pitchers, under the sink, and the whole
house, etc. are not designed to remove the specific bacteria potentially present during a boil water advisory.
If you ran water through your filter during the boil water advisory, the filter could be contaminated.
 Remove and discard water filters
 Replace with a new filter following flushing
Note: If you cannot flush or run water when filter is removed, replace with new filter after
flushing. Always follow manufacturer’s directions for filter replacement.
4. CHECK APPLIANCES/DEVICES
Always read and follow the owner’s manual for directions to clean and flush all appliances that use water.
Dishwashers
 After flushing hot water pipes and water heater, run empty dishwasher one time on the
hottest or ‘sanitize’ cycle.
(More)
Refrigerators/Freezers
Always follow filter replacement recommendations above.
 For refrigerators without filters, flush water dispensers by running at least one quart of
water.
o If unsure of your dispenser's capacity, refer to manufacturer specifications.
 Flush home automatic ice makers. Make three batches of ice cubes and discard all three
batches.
Water Softeners
 Run water softeners through a full regeneration (flush) cycle.
Portable Humidifiers
 Discard any water used in the device.
 Rinse the device with clean water and sanitize.
 If your humidifier has a filter, sanitize the humidifier and replace the filter.
o Always follow the manufacturer’s instructions when you use bleach or any other
cleaning product.
o Use distilled or demineralized water in humidifiers.
Furnace Humidifiers
There is potential for bacteria to grow on humidifier pads and in humidifier reservoirs after a boil water
advisory.
 Follow manufacturer’s guidelines to clean and disinfect all parts of the humidifier.
 Replace humidifier pad if it cannot be disinfected.
Other Devices
If you used contaminated water during the boil water advisory in nebulizers, Continuous Positive
Airway Pressure (CPAP) machines, oral, medical, or health care devices, take the following actions:
 Discard any water used in the devices listed above.
 Rinse the device with clean water and sanitize.
 If your humidifier has a filter, sanitize the humidifier and replace the filter.
o Always follow the manufacturer’s instructions when you use bleach or any
other cleaning product.
o Sterile water should be used for CPAP machines and nebulizers. Follow
manufacturer’s directions.
The Oakland County Health Division will not deny participation in its programs based on race, sex, religion, national origin,
age or disability. State and federal eligibility requirements apply for certain programs.
I:\Health\CHPIS\Health Ed\Communications\emerging topics\Boil Water Advisory. 10/26/17.