California · population 185,285
Lead pipes in Ontario, CA
No lead lines reported
Most of Ontario (population 185,285) gets its water from Ontario Municipal Utilities Company, which reported 39,390 service lines and no lead, galvanized or unknown lines.
0% of Ontario Municipal Utilities Company's service lines are lead or galvanized requiring replacement, lower than the California average (0.1%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 0%
- Non-lead 100%
Latest lead test for Ontario Municipal Utilities Company (Jan 2022–Dec 2024): 0.6 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Ontario Municipal Utilities Company.
Water systems serving Ontario
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Ontario Municipal Utilities CompanyMain system | 0 | 0 | 0 | 0% |
| Cucamonga Valley Water DistrictServes nearby areas | 0 | 0 | 0 | 0% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Ontario
The counts above cover the whole water system. To see whether your line is lead, look up your address on Ontario Municipal Utilities Company's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Eastvaleno lead reported
- Chino872 lead + galv. lines
- Montclairno lead reported
- Uplandno lead reported
- Rancho Cucamongano lead reported
- Jurupa Valleyno lead reported
- Claremontno lead reported
- Pomonano lead reported
Check another water system
Questions
Does Ontario, CA have lead pipes?
Ontario Municipal Utilities Company, which serves Ontario, reported no lead, galvanized or unknown service lines.
Who supplies water to Ontario?
EPA's service area maps place most of Ontario in Ontario Municipal Utilities Company's service area (PWSID CA3610034). Cucamonga Valley Water District also serves parts of the city or nearby areas.
How do I check whether my Ontario home has a lead service line?
Search your address on Ontario Municipal Utilities Company's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Ontario be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Ontario Municipal Utilities Company whether your street is scheduled and whether it covers the private side.