Critical Point in Ongoing Repairs, Full Cooperation of Residents Needed to Aid Ongoing Efforts
Granada Hills/Porter Ranch Water Incident Update #10
August 9, 2025 – PM Update
LADWP crews are making significant progress to restore water service to the Granada Hills and Porter Ranch communities. Ongoing repairs have reached a critical point that require the full cooperation of residents in the affected area to refrain from using the tap until further notice. Using water will delay our progress for repairs, repressurizing the system and completing sampling and testing to lift the Boil Water Notice.
To begin replacing the broken valve, LADWP crews had intended to begin emptying the water from the pipe connecting to the temporary water source tonight at 8 p.m. However, at approximately 5:00 p.m., the pipe blew out and spilled the water onto the street. The pumps and valves have been shut and while residual water in the pipe continues to flow, this does not impede our plans and continued progress to start the dewatering process.
The temporary water source feeding the system is now shut and as such, there is very limited water supply in the system. It is paramount that customers keep taps closed, sprinkler systems off, and pool filling systems shut down. Following this guidance will help speed up full water service restoration as we refill the tank and repressurize the system.
WATER QUALITY RESTORATION
LADWP will begin water quality sampling and testing as soon possible. 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 that we send the water samples to the lab and get results that may take about 18 hours. 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:
- 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, restrooms
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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