Water damage restoration in Ontario, CA
In Ontario, CA, the most common water damage sources are leaking appliances and plumbing, roof leaks and storm runoff. Ontario has 54,951 homes with a median build year of 1980: 23% predate 1960 and 20% were built since 2000, so plumbing ranges from original copper and galvanized lines to newer PEX. Restoration companies in our network serve 5 Ontario ZIP codes in San Bernardino County.
- Fast callback on emergency requests
- San Bernardino County · 5 ZIP codes
Quick answer
For water, fire or smoke damage in Ontario, CA, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 5 Ontario ZIP codes are covered. Drying should start within 24 to 48 hours to prevent mold.
Local risks
What causes water damage in Ontario
Mixed-age plumbing
Ontario's housing spans many decades, so leaks come from both ends: corroded original pipes in older homes and failed supply lines and appliances in newer ones.
Atmospheric rivers
Winter storms bring heavy rain, roof leaks and flooding.
Slab leaks
Leaks in pipes under the slab go unnoticed.
Seasonal risks, licensing and FEMA history across the state are on the California page.
Common calls
Most requested in Ontario
Census data
Ontario homes by the numbers
- Homes
- 54,951
- Median year built
- 1980
- Built before 1960
- 23%
- Owner-occupied
- 57%
Among the 213 California cities with pages on this site, Ontario ranks #31 by number of homes and has older housing than 35% of them (median build year 1980). Its share of pre-1960 homes (23%) is close to the 24% average for those cities.
Source: U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates (tables B25034, B25035, B25003); 185,285 residents per the 2024 population estimate.
Disaster history in San Bernardino County
Since 2000, FEMA has included San Bernardino County in 8 major disaster declarations: 4 severe storms, 3 fires, 1 flood. The most recent was Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides in 2023 (DR-4699).
Source: OpenFEMA disaster declarations, retrieved October 5, 2026.
FAQ
Ontario water damage questions
Who do I call for water damage in Ontario?
For water, fire or smoke damage in Ontario, CA, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 5 Ontario ZIP codes are covered. Drying should start within 24 to 48 hours to prevent mold.
How old are homes in Ontario?
The median home in Ontario was built in 1980. About 23% of its 54,951 homes were built before 1960 and 20% in 2000 or later, according to the Census Bureau's American Community Survey. Older homes are more likely to have corroded pipes and drains; newer homes see more appliance and supply-line leaks.
Has San Bernardino County had federally declared disasters?
Yes. Since 2000, FEMA has included San Bernardino County in 8 major disaster declarations for storms, floods, fires and similar events, most recently Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides (2023). Federal assistance is only available for declared events; most water damage is handled through homeowners or flood insurance.
Do you cover all of Ontario?
Restoration companies in our network cover 5 Ontario ZIP codes. Coverage is set ZIP by ZIP, so enter yours in the ZIP checker or call to confirm a company serves your address.
ZIP codes covered in Ontario
91743, 91758, 91761, 91762, 91764
Water damage help near Ontario
- Water damage restoration in Chino, CA5 mi
- Water damage restoration in Upland, CA6 mi
- Water damage restoration in Rancho Cucamonga, CA7 mi
- Water damage restoration in Jurupa Valley, CA8 mi
- Water damage restoration in Pomona, CA9 mi
- Water damage restoration in Fontana, CA10 mi
- Water damage restoration in Chino Hills, CA10 mi
- Water damage restoration in Corona, CA12 mi
Also covered in San Bernardino County: Victorville · Patton · San Bernardino · Fontana · Rancho Cucamonga · Rialto · Hesperia · Chino · Upland · Chino Hills · Apple Valley · Redlands · Highland · Yucaipa · Colton · Adelanto · Montclair · Twentynine Palms
Guides for Ontario homeowners
Water damage in Ontario?
Stop the source if you can, then call. We'll connect you with a local restoration company that serves your ZIP.
Fast callback on emergency requests