Chino Hills’ water system includes more than 200 miles of water lines and 21,000 individual water connections.

Help Chino Hills conserve water by immediately reporting water leaks.  Maintenance staff will investigate every report of water loss and schedule repair based on the severity of the leak and other possible emergencies in the water system.   To report water leaks, call (909) 364-2800 during our regular business hours.  For an after-hours water emergency, please call (909) 364-2860.

The maximum and minimum water pressure for any location served by the City of Chino Hills can be obtained by calling the City Engineering Department at (909) 364-2770.  Water pressure information is primarily used by plumbers, contractors and homeowners to determine pipe requirements and whether or not a pressure regulator is necessary. 

If you are experiencing low or high water pressure, there are a few things that you can check to see if the pressure problem is in your household pipelines.

First, check the pressure/flow at your outside hose bib, usually located in the front of your home.  If you are getting good flow at the hose bib, the problem may be isolated inside your home. 
If there is very little pressure and flow from the hose bib, check the gate valve that is located on the standpipe to make sure it is turned on all the way.  If your gate valve is on all the way, your pressure regulator may need to be adjusted or replaced.  This pressure regulator is the homeowner’s responsibility to maintain.  If the problem is not found to be at the regulator, possibly your house line may need to be replaced.

A City representative will be happy to meet with you to try and determine the source of the pressure problem. Call (909) 364-2800 to schedule a pressure test.  Also, if you are installing sprinklers and need to know the pressure at your home, call (909) 364-2800 to schedule the test.

In the City of Chino Hills, new residential plumbing requires a pressure regulator, whenever the water pressure from the City water main can exceed 80 pounds per square inch (psi).  This requirement is from the Uniform Plumbing Code as adopted and enforced by the City Building and Safety Division. Although, most pressure regulators are adjustable, they are normally set at a pressure between 50 and 70 psi. Regulators are installed and maintained by the property owner. Regulators are always located above ground, usually near where the plumbing enters the house. Older homes may not have pressure regulators even if the water pressure in the City water main exceeds 80 psi because they predate the current plumbing code.