Home hazard report for 94666 — Oakland, CA
ZIP 94666 is served by East Bay MUD: no health-based violations since 2016, latest lead result 0 ppb, PFAS 2 detected. Alameda is in EPA radon zone 2.
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.
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
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Where ZIP 94666 is
blue: utility service area · scroll or pinch to zoomDrinking water: East Bay MUD
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 |
|---|---|---|---|
| PFBA | 5.2 ppt | 2 of 21 | — |
| PFHxA | 3.5 ppt | 2 of 21 | — |
| PFDA | not detected | 0 of 21 | — |
| PFOA | not detected | 0 of 21 | 4 ppt MCL |
| PFOS | not detected | 0 of 21 | 4 ppt MCL |
| PFNA | not detected | 0 of 21 | — |
| PFHxS | not detected | 0 of 21 | — |
| PFHpA | not detected | 0 of 21 | — |
| PFBS | not detected | 0 of 21 | — |
| HFPO-DA (GenX) | not detected | 0 of 21 | — |
| PFPeA | not detected | 0 of 21 | — |
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 Alameda
EPA radon zone 2 — moderate potential. Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
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 |
|---|---|---|
| AMCO Chemical Oakland, California · EPA ID CA0001576081 | Active (final NPL) | 1.3 mi |
| Alameda Naval Air Station Alameda, California · EPA ID CA2170023236 | Active (final NPL) | 3.4 mi |
| Hunters Point Naval Shipyard San Francisco, California · EPA ID CA1170090087 | Active (final NPL) | 7.7 mi |
| Liquid Gold Oil Corp. Richmond, California · EPA ID CAT000646208 | Cleaned up & deleted | 7.8 mi |
| United Heckathorn Co. Richmond, California · EPA ID CAD981436363 | Active (final NPL) | 9.7 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 94666
Who supplies drinking water to ZIP 94666?
East Bay MUD (EPA ID CA0110005), a surface water (rivers, lakes) system serving about 1,468,000 people.
Is there lead in Oakland, 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 Oakland, CA water have PFAS?
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Has the water system in 94666 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 94666?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: AMCO Chemical (1.3 mi, Active (final NPL)); Alameda Naval Air Station (3.4 mi, Active (final NPL)); Hunters Point Naval Shipyard (7.7 mi, Active (final NPL)).
Is radon a problem in Alameda?
Alameda is in EPA radon zone 2 (moderate potential). Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.