Home hazard report for 95201 — Stockton, CA
ZIP 95201 is served by California Water Service - Stockton: no health-based violations since 2016, latest lead result 0 ppb, PFAS 5.2 ppt. San Joaquin is in EPA radon zone 3.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2022). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 1 PFAS compound detected.
Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
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Where ZIP 95201 is
blue: utility service area · scroll or pinch to zoomDrinking water: California Water Service - Stockton
Health-based violations
No health-based violations reported since 2016.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFOS | 5.2 ppt | 2 of 28 | 4 ppt MCL |
| PFBA | not detected | 0 of 28 | — |
| PFPeA | not detected | 0 of 28 | — |
| HFPO-DA (GenX) | not detected | 0 of 28 | — |
| PFHxS | not detected | 0 of 28 | — |
| PFHxA | not detected | 0 of 28 | — |
| PFDA | not detected | 0 of 28 | — |
| PFOA | not detected | 0 of 28 | 4 ppt MCL |
| PFNA | not detected | 0 of 28 | — |
| PFHpA | not detected | 0 of 28 | — |
| PFBS | not detected | 0 of 28 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in San Joaquin
EPA radon zone 3 — low potential. Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| McCormick & Baxter Creosoting Co. Stockton, California · EPA ID CAD009106527 | Active (final NPL) | 1.2 mi |
| Sharpe Army Depot Lathrop, California · EPA ID CA8210020832 | Active (final NPL) | 9.0 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 95201
Who supplies drinking water to ZIP 95201?
California Water Service - Stockton (EPA ID CA3910001), a surface water (rivers, lakes) system serving about 182,775 people.
Is there lead in Stockton, CA tap water?
The utility’s latest 90th-percentile lead result (Jan 2022) was 0 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Stockton, CA water have PFAS?
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 1 PFAS compound detected.
Has the water system in 95201 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 95201?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: McCormick & Baxter Creosoting Co. (1.2 mi, Active (final NPL)); Sharpe Army Depot (9.0 mi, Active (final NPL)).
Is radon a problem in San Joaquin?
San Joaquin is in EPA radon zone 3 (low potential). Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.