Chino, CA · PWSID CA3610012
City of Chino lead service lines
872 lead or galvanized lines to replace
City of Chino reported 0 lead and 872 galvanized-requiring-replacement service lines out of 24,107 in its inventory. That's about 1 in 28 lines. Another 0 (0%) are still listed as unknown material.
Ranks #4 of 92 California systems with confirmed lead lines, and #429 nationally.
3.6% of City of Chino's service lines are lead or galvanized requiring replacement. That's higher than the California average (0.1%) and about the same as the national average (3.1%).
- Lead 0%
- Galvanized (replace) 3.6%
- Unknown 0%
- Non-lead 96%
Total service lines reported: 24,107. Reported all required service line types. Population served: 90,187; 23,780 connections.
Lead test results
City of Chino's most recent 90th-percentile lead result (Jan 2022–Dec 2024) was 1 ppb, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 872 in 2025 Q1 to 872 in 2026 Q3: no change. Lines of unknown material went from 0 to 0, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists 1 Lead and Copper Rule violation since 2015 for City of Chino. Health-based violations are treatment failures, such as corrosion control or public education; the rest are missed monitoring or reporting.
| Began | Violation | Status |
|---|---|---|
| Oct 2021 | Missed follow-up or routine lead and copper tap sampling | Returned to compliance |
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
City of Chino's main water source is purchased surface water. It buys treated water from Chino Basin Desalter Auth. - Desalter 1, Water Facilities Authority-Jpa, Monte Vista WD. The seller treats the water, including corrosion control that keeps lead from dissolving out of pipes, while City of Chino is responsible for its own service line inventory and replacement program. It sells water to 2 other water systems: Monte Vista WD, Ontario Municipal Utilities Company.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask City of Chino whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in San Bernardino County
Cities served
ZIP codes served
ZIP codes whose center falls inside City of Chino's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
9170891710
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| Victorville Water District | 408 | 0 |
| Sbdno County Service Area 64 | 0 | 3,871 |
| Big Bear City CSD | 0 | 4,578 |
| US Army Fort Irwin | 2 | 878 |
| Western Heights Water Company | 1,462 | 28 |
| MP Mine Operations LLC | 2 | 1 |
| Center Water Co | 3 | 0 |
| Foothill Estates MHP | 9 | 0 |
Check another water system
Questions
Does City of Chino have lead pipes?
Yes. City of Chino reported 0 lead service lines and 872 galvanized lines that must be replaced, out of 24,107 total. 0 more are of unknown material.
How do I check if my home's service line is lead?
Look up your address on City of Chino's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will City of Chino replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has City of Chino had lead violations?
EPA's data shows 1 Lead and Copper Rule violation since 2015 for City of Chino.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "City of Chino lead service lines," https://leadpipemap.com/ca/city-of-chino/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.