Home hazard report for 85178 — Apache Junction, AZ
ZIP 85178 is served by Apache Junction Water District: 5 violations since 2016, latest lead result 0 ppb, PFAS not detected. Pinal is in EPA radon zone 2.
Health-based violations since 2016: Tthm, Lead and Copper Rule Revisions. All are listed as resolved.
90th-percentile lead in the latest round (Jan 2023). 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 indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
The nearest active Superfund site is 9.1 miles away.
Active weather alerts
live from the National Weather ServiceChecking the National Weather Service…
Where ZIP 85178 is
blue: utility service area · scroll or pinch to zoomDrinking water: Apache Junction Water District
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Tthm | 4 |
| Lead and Copper Rule Revisions | 1 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Apr 2025.
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 |
|---|---|---|---|
| PFBS | not detected | 0 of 4 | — |
| PFDA | not detected | 0 of 4 | — |
| PFOA | not detected | 0 of 4 | 4 ppt MCL |
| PFOS | not detected | 0 of 4 | 4 ppt MCL |
| PFNA | not detected | 0 of 4 | — |
| PFHpA | not detected | 0 of 4 | — |
| PFHxA | not detected | 0 of 4 | — |
| PFHxS | not detected | 0 of 4 | — |
| PFPeA | not detected | 0 of 4 | — |
| PFBA | not detected | 0 of 4 | — |
| HFPO-DA (GenX) | not detected | 0 of 4 | — |
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 Pinal
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 |
|---|---|---|
| Williams Air Force Base Chandler, Arizona · EPA ID AZ7570028582 | Active (final NPL) | 9.1 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 85178
Who supplies drinking water to ZIP 85178?
Apache Junction Water District (EPA ID AZ0411039), a surface water (rivers, lakes) system serving about 15,610 people.
Is there lead in Apache Junction, AZ tap water?
The utility’s latest 90th-percentile lead result (Jan 2023) 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 Apache Junction, AZ water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 85178 had violations?
Health-based violations since 2016: Tthm, Lead and Copper Rule Revisions. All are listed as resolved.
Are there Superfund sites near 85178?
The nearest active Superfund site is 9.1 miles away. Sites within 10 miles: Williams Air Force Base (9.1 mi, Active (final NPL)).
Is radon a problem in Pinal?
Pinal 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.