Home hazard report for 95617 — Davis, CA
ZIP 95617 is served by City of Davis: no health-based violations since 2016, latest lead result 0 ppb, PFAS not detected. Yolo is in EPA radon zone 3.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2024). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
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 95617 is
blue: utility service area · scroll or pinch to zoomDrinking water: City of Davis
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 |
|---|---|---|---|
| PFHpA | not detected | 0 of 18 | — |
| HFPO-DA (GenX) | not detected | 0 of 18 | — |
| PFHxA | not detected | 0 of 18 | — |
| PFDA | not detected | 0 of 18 | — |
| PFOA | not detected | 0 of 18 | 4 ppt MCL |
| PFOS | not detected | 0 of 18 | 4 ppt MCL |
| PFHxS | not detected | 0 of 18 | — |
| PFBS | not detected | 0 of 18 | — |
| PFBA | not detected | 0 of 18 | — |
| PFNA | not detected | 0 of 18 | — |
| PFPeA | not detected | 0 of 18 | — |
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 Yolo
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 |
|---|---|---|
| Laboratory for Energy-Related Health Research/Old Campus Landfill (USDOE) Davis, California · EPA ID CA2890190000 | Active (final NPL) | 2.5 mi |
| Frontier Fertilizer Davis, California · EPA ID CAD071530380 | Active (final NPL) | 2.8 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 95617
Who supplies drinking water to ZIP 95617?
City of Davis (EPA ID CA5710001), a surface water (rivers, lakes) system serving about 67,826 people.
Is there lead in Davis, CA tap water?
The utility’s latest 90th-percentile lead result (Jan 2024) 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 Davis, CA water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 95617 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 95617?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Laboratory for Energy-Related Health Research/Old Campus Landfill (USDOE) (2.5 mi, Active (final NPL)); Frontier Fertilizer (2.8 mi, Active (final NPL)).
Is radon a problem in Yolo?
Yolo 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.