Request Not to Use Tap Water Remains Until Further Notice, Boil Water Still in Place
Incident Update #12
August 10, 2025 – PM Update
LADWP crews have spent a majority of the day Sunday refilling the tank critical to restoring water service to Granada Hills and Porter Ranch customers after successfully installing a new section of pipe where the previous broken valve was removed.
It took multiple days for crews to remove the deeply buried valve that broke earlier in the week that led to the loss of water service in the area and to install and weld the section of pipe in its place.
With the new section of pipe installed, the previous water pumping effort from the alternate Metropolitan Water District of Southern California (MWD) water source has been disconnected. The current refilling effort is being done through LADWP’s normal pumping process, now that the valve removal and new pipe replacement is completed.
More customers will experience water restoration at their homes, especially those in the lower elevation. However, LADWP urges customers in the affected communities to continue to refrain from using any tap water. The more water demand, the longer it will take to refill the tank to a level high enough to give the all-clear for customers to start using tap water for flushing and other non-potable uses. If progress continues at the current pace, restoration of full service could occur by Monday morning.
The quicker water service is returned to customers, the sooner LADWP’s water quality team can collect water samples and start the clock on the water sampling and testing process. Water sampling will require two rounds of an18-hours testing cycle. If test result for both rounds come back clear for any bacteria, the Boil Water Notice in effect since August 6 can be lifted for affected customers.
We understand the frustration that customers may be experiencing and appreciate their continued efforts which is crucial as crews continue to work as quickly and safely as possible to restore water service.
WATER QUALITY RESTORATION
LADWP will begin water quality sampling and testing as soon as our pipe and water tank have been refilled. We are working with our regulators in the Division of Drinking Water to make sure we follow the strict guidelines for testing and reporting, which requires us to send the water samples to the lab and get results that may take about 18 hours and repeat the process again for confirmation. These are critical steps to restore water quality and ultimately lift the Boil Water Notice.
The Boil Water Notice can be accessed by clicking this link: BOIL WATER NOTICE FOR PORTIONS OF PORTER RANCH AND GRANADA HILLS (ladwpnews.com).
www.ladwp.com/WaterQuality, which includes the Boil Water Notice, frequently asked questions, and an interactive map to enter your address to determine if the Boil Water Notice applies to you. Regular updates related to this incident are also available on our newsroom at www.ladwpnews.com.
SUPPORT FOR CUSTOMERS
We have distributed more than one million bottles of water, and more than 1,200 gallons of water delivered to vulnerable home-bound customers. We continue to provide support to vulnerable customers, including seniors and customers with disabilities and functional needs, who are unable to visit the bottled water distribution centers.
The cooperation of our customers makes a big difference, and we truly appreciate their support. Residents in the affected communities can help by following these guidelines:
- Use bottled water for drinking and cooking.
- Keep all indoor and outdoor taps closed.
- Refrain from doing laundry and dishes.
- TURN OFF all sprinklers and smart irrigation systems—these automatically draw water from the system.
- TURN OFF swimming pool automatic fill systems.
LADWP has also deployed a range of support services, including bottled water distribution, recycled water for outdoor use and toilet flushing, and access to mobile showers and laundry facilities.
Assistance is available at five locations. Please note: Different services are provided at different locations:
- 7 AM – 9 PM, Holleigh Bernson Memorial Park, 20500 Sesnon Blvd, Porter Ranch, CA 91326: Water bottle distribution, recycled water distribution, restrooms, showers, mobile laundry units
- 7 AM- 9 PM, O’Melveny Park, 17300 Sesnon Blvd., Granada Hills, CA 91344: Water bottle distribution, recycled water distribution, restroom
- 7 AM – 9 PM, Intersection of Tampa Ave. And Sesnon Blvd. on the border of Northridge and Porter Ranch: Water bottle distribution and recycled water distribution
- 5 AM – 10 PM, YMCA, 11336 Corbin Street, Porter Ranch, CA 91326: Showers, mobile laundry units
- 5 AM – 10 PM Intersection of Rinaldi and Louise Ave: Showers, mobile laundry units
We encourage our vulnerable customers, including seniors, and customers with disabilities and functional needs who are unable to visit the bottled water distribution centers to call LADWP’s call center at 1-800-DIAL-DWP (1-800-342-5397) to “Report an Outage” and request to speak to a customer service representative.
For individuals who are Deaf, hard of hearing, or have a speech disability, dial 711 to connect with California Relay, or call 1-800-HEAR-DWP (1-800-432-7397) for TTY.
BACKGROUND ON WATER LOSS AND ONGOING REPAIR WORK
On August 5, while water system crews were making repairs at a pump station that connects to a 10-million-gallon water tank that serves the area, a valve that controls the flow of water broke during repairs and failed to reopen. As a result, the water flowing into a 54-inch-diameter pipe serving the area was cut off.
This has led to a water service outage in the general area bounded by Rinaldi Avenue to the south, Balboa Blvd to the east, De Soto Ave to the west and the foothills & hills to the north. For specific boundaries, please refer to the map below.
We understand how disruptive this situation has been for our customers, and we want to assure the community that restoring water service safely and swiftly remains our top priority. Our crews are working tirelessly on-site, around the clock, until full service is restored. We remain committed to keeping you informed and supported every step of the way.
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