Effective August 12, LADWP has confirmed that tap water is safe to drink in all areas of Granada Hills and Porter Ranch previously impacted by the Boil Water Notice issued on August 6, 2025. Residents may now resume normal use of tap water. However, LADWP strongly recommends flushing your pipes for at least 5 minutes to clear any stagnant water.
With the lifting of the Boil Water Notice, water distribution sites will close effective immediately.
The Boil Water Notice was issued following an interruption in water service when a large valve feeding a 10-million gallon tank serving the area broke and required complex repairs. LADWP crews worked around the clock to successfully restore service to affected customers. Although the Boil Water Notice has been lifted, it is recommended that customer flush pipes after tap water is declared safe to drink. Customers can take the following steps to flush out any stagnant water that may be present in their home or business plumbing:
Prepare your site for flushing. Remove aerators and screens from all faucets. Set water-softening devices and filters, both point-of-use and whole-house, to “bypass mode.”
- Flush outside plumbing. Open and flush external hose bibs/faucets for about 5 minutes or until water is clear and temperature is constant.
- Flush cold water. Run all cold water faucets on the property beginning with the faucet closest to the water line. Run the water at the highest flow (or fully open) for 5 minutes or until water is clear and temperature is constant. Then turn off all faucets in reverse order.
- Flush hot water. Drain your hot water tank to discharge any accumulated sediments. Wait for the hot water tank to refill then run all hot water faucets on the property beginning with the faucet closest to the water line. Let all faucets run at the highest flow (or fully open) for 5 minutes. Then turn off all faucets in reverse order.
- Flush all toilets. A one-time flush should suffice.
- Automatic Ice Makers. Dump existing ice and flush the water feed lines by making and discarding three batches of ice cubes. Wipe down the ice bin with a disinfectant.
- Clean and disinfect aerators and screens. Prepare a 20% liquid chlorine bleach solution by adding 1 cup of laundry bleach to 4 cups of water. Place aerators in solution for no more than 5 minutes (any longer may cause damage to aerator) then briefly rinse with clean water and reattach to faucets, shower heads, and fixtures.
- Flush appliances. Run empty dishwasher and washing machine once on rinse cycle. Flush water dispenser on refrigerator for 5 minutes.
- Replace all filters and reset all water devices from “bypass mode.” This applies especially to carbon filters and others that are near the end of their life.
- Reverse Osmosis (RO) units: Replace pre-filters, refer to owner’s manual for specific guidance.
- Water softeners: Run through a regeneration cycle.