Riverside County · Riverside–San Bernardino–Ontario metro
Plumbing help in Riverside, CA
Very Hard WaterOlder Pipes
Riverside is nearly self-sufficient in water, pumping about 97% from local groundwater basins, and that water is hard. Inland heat, scale and an aging housing stock drive most local calls.
- Median home built
- 1976
- Built before 1980
- 57%
- Owner-occupied
- 56%
- Water hardness
- Very hard
- ≈ 11 grains/gal
- Winter
- Hard freezes are rare
- Plumbing code
- UPC
The plumbing calls that come up most in Riverside
- Water Heater Repair
Hard groundwater builds sediment in heaters.
- Water Softener Installation
At about 11 grains per gallon, many homes soften.
- Slab Leak Repair
Slab-on-grade homes hide supply line leaks.
Riverside's very hard water and your plumbing
Riverside Public Utilities supplied about 97% of its water in 2024 from local groundwater basins (Bunker Hill, Colton and Riverside); hardness was about 11 grains per gallon (180 to 210 mg/L). [1]
Emergency plumbing in Riverside
Call (833) 878-1592Shut off your main water supply if it's safe to do so. The emergencies below are listed most likely first for Riverside homes, based on local conditions.
Riverside's 1970s housing and its pipes
The median home in Riverside was built in 1976, and 57% of homes predate 1980. Homes from that era were typically built with copper supply, early plastic (ABS or PVC) drains, some cast iron.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Plumbing code and permits in Riverside
Plumbing here follows the 2025 California Plumbing Code, based on the 2024 Uniform Plumbing Code, effective January 1, 2026; plumbing contractors hold a CSLB C-36 license. [2]
Plumbing services for Riverside homes
Riverside plumbing questions
Is Riverside water hard?
Yes, about 11 grains per gallon (180 to 210 mg/L) in 2024.
Where does Riverside's water come from?
About 97% from local groundwater basins: Bunker Hill, Colton and Riverside.
How do I check a Riverside plumber?
Use the CSLB's Check a License search and look for the C-36 classification.
How do I spot a slab leak in Riverside?
Look for warm floor spots, the sound of running water and a meter that moves with everything off.
Which plumbing code applies in Riverside?
The 2025 California Plumbing Code, based on the 2024 UPC.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- Riverside Public Utilities, 2024 Water Quality Report · checked 2026-10-01
- IAPMO, 2025 California Plumbing Code · checked 2026-10-01