In a Rancho Cucamonga plumbing emergency, close the main shutoff, and if you smell gas, leave and call 911 and SoCalGas at 1-800-427-2200. Cucamonga Valley Water District supplies the water and handles problems in its mains. For anything on your property, call the number on this page to be connected with a local plumber in Rancho Cucamonga.

Rancho Cucamonga at a glance
Rancho Cucamonga stretches from Foothill Boulevard, the historic Route 66, up through Alta Loma and Etiwanda, with Terra Vista and the Victoria Gardens area in between. Cucamonga Valley Water District (CVWD) is the City's listed water provider, at (909) 944-6000. A leak in the street or at the meter goes to CVWD; anything on your side is plumbing work. Electricity comes from either Southern California Edison or the City-owned Rancho Cucamonga Municipal Utility, which matters if a power outage has knocked out an electric or tankless water heater.
What to do right now
- Get safe. If you smell gas, leave first and call 911 and SoCalGas from outside. Keep away from water near outlets or appliances.
- Stop the water. Close the main shutoff, usually where the supply comes out of the ground near the front of the house or garage.
- Relieve pressure. Open a low faucet or tub spout to drain the lines.
- Shut down the heater. If the water heater is leaking, turn off its gas or breaker and close its cold supply.
- Stop using drains if anything is backing up.
- Call. Use the number on this page and describe what you see.
Symptoms and what they usually mean
| Symptom | Likely cause |
|---|---|
| Warm spot on the floor, meter turning with taps off | Hot water line leaking under the slab |
| Water pooling at the base of the heater | Tank failure or a leaking fitting |
| Several drains backing up at once | Main line or lateral clog |
| Wet yard near the meter with no rain | Break in the service line or irrigation main |
| Hissing behind a wall | Pinhole leak or failed fitting |
What sets the cost
- Time of the call. After-hours, weekend and holiday visits usually cost more.
- Finding the leak. Slab and wall leaks may need detection equipment before repair.
- The fix itself. A fitting is small; a water heater or a rerouted line is larger.
- Permits. The City of Rancho Cucamonga Building & Safety takes all permit applications online through its Online Permit Center, and its inspections include water heater installations.
No arrival time is promised; it depends on the hour and the plumber's schedule.
Emergency Plumber questions in Rancho Cucamonga
Who do I call about a water main break or a leak in the street after hours?
The whole house lost water. Is it my plumbing or the utility?
Water seems to be running somewhere but I can't see a leak. Could it be under the slab?
Does a replacement water heater have to be strapped?
More plumbing services in Rancho Cucamonga
Emergency Plumber nearby
Helpful guides
Sources
Last updated: