Lead in Winchester, CA Drinking Water
Lead data for Winchester, California · 36,725 residents · 1 ZIP code
Within Winchester, California, Lead has been detected in water samples drawn from the public supply — the results are part of the official EPA compliance record for systems here.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Lead in Winchester Tap Water
Winchester, California has 7 EPA violations related to lead in drinking water.
This analysis covers 36,725 residents across 1 ZIP code in Winchester.
Winchester's overall water quality grade is C (63/100).
Is Lead in Winchester Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or nsf 53 carbon block filter certified under NSF 53 / NSF 58 and testing your water independently.
EPA Violations for Lead in Winchester
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2022-10-01 | Lead (Resolved) | Resolved | 92596 |
| 2022-07-01 | Lead (Resolved) | Resolved | 92596 |
| 2022-04-01 | Lead (Resolved) | Resolved | 92596 |
| 2022-01-01 | Lead (Resolved) | Resolved | 92596 |
| 2021-10-01 | Lead (Resolved) | Resolved | 92596 |
| 2021-07-01 | Lead (Resolved) | Resolved | 92596 |
| 2021-04-01 | Lead (Resolved) | Resolved | 92596 |
Health Effects of Lead
- Brain development delays and reduced IQ in children
- Behavioral problems and learning disabilities
- High blood pressure and kidney damage in adults
- Increased risk of premature birth in pregnant women
Health risk severity: High. Governed by the Lead and Copper Rule Revisions (LCRR/LCRI).
How Lead Gets Into Drinking Water
- Corrosion of lead service lines (pipes connecting water main to home)
- Lead solder in copper plumbing joints (pre-1986 homes)
- Brass fixtures and faucets manufactured before 2014
- Stagnant water that sits in lead-containing pipes overnight
What to Do About Lead in Winchester Water
- Install an NSF 53 or NSF 58 certified filter at kitchen sink
- Run cold water for 30 seconds before using for drinking or cooking
- Use cold water only for cooking and preparing formula
- Consider whole-home reverse osmosis if lead service line is present
Look for filters certified under NSF 53 / NSF 58 for lead removal.