Home hazard report for 80040 — Aurora, CO
ZIP 80040 is served by City of Aurora: no health-based violations since 2016, latest lead result 4.7 ppb, PFAS 4 detected. Adams is in EPA radon zone 1.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2026). 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 above 4 pCi/L — EPA’s action level. Test your home.
The nearest active Superfund site is 5.6 miles away.
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Where ZIP 80040 is
blue: utility service area · scroll or pinch to zoomDrinking water: City of Aurora
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 | 7.8 ppt | 1 of 12 | — |
| PFPeA | 7.2 ppt | 1 of 12 | — |
| PFHxA | 5.6 ppt | 1 of 12 | — |
| PFBS | 3.3 ppt | 1 of 12 | — |
| PFHxS | not detected | 0 of 12 | — |
| PFHpA | not detected | 0 of 12 | — |
| PFDA | not detected | 0 of 12 | — |
| HFPO-DA (GenX) | not detected | 0 of 12 | — |
| PFOA | not detected | 0 of 12 | 4 ppt MCL |
| PFOS | not detected | 0 of 12 | 4 ppt MCL |
| PFNA | not detected | 0 of 12 | — |
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 Adams
EPA radon zone 1 — highest potential. Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
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 |
|---|---|---|
| Chemical Sales Co. Denver, Colorado · EPA ID COD007431620 | Active (final NPL) | 5.6 mi |
| Sand Creek Industrial Commerce City, Colorado · EPA ID COD980717953 | Cleaned up & deleted | 7.0 mi |
| Woodbury Chemical Co. Commerce City, Colorado · EPA ID COD980667075 | Cleaned up & deleted | 7.4 mi |
| Rocky Mountain Arsenal (USARMY) Adams County, Colorado · EPA ID CO5210020769 | Active (final NPL) | 7.8 mi |
| Vasquez Boulevard and I-70 Denver, Colorado · EPA ID CO0002259588 | Active (final NPL) | 8.0 mi |
| Lowry Landfill Arapahoe County, Colorado · EPA ID COD980499248 | Active (final NPL) | 8.9 mi |
| Denver Radium Site Denver, Colorado · EPA ID COD980716955 | 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 80040
Who supplies drinking water to ZIP 80040?
City of Aurora (EPA ID CO0103005), a surface water (rivers, lakes) system serving about 533,407 people.
Is there lead in Aurora, CO tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) was 4.7 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 Aurora, CO water have PFAS?
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Has the water system in 80040 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 80040?
The nearest active Superfund site is 5.6 miles away. Sites within 10 miles: Chemical Sales Co. (5.6 mi, Active (final NPL)); Sand Creek Industrial (7.0 mi, Cleaned up & deleted); Woodbury Chemical Co. (7.4 mi, Cleaned up & deleted).
Is radon a problem in Adams?
Adams is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.