Home hazard report for 19353 — Lionville, PA
ZIP 19353 is served by Aqua Pa Uwchlan (as listed by the state): no health-based violations since 2016, latest lead result 2.2 ppb, PFAS 9.3 ppt. Chester is in EPA radon zone 1.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jun 2025). 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. 6 PFAS compounds detected.
Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
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Where ZIP 19353 is
blue: utility service area · scroll or pinch to zoomDrinking water: Aqua Pa Uwchlan
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 |
|---|---|---|---|
| PFOA | 9.3 ppt | 9 of 16 | 4 ppt MCL |
| PFPeA | 7.7 ppt | 9 of 16 | — |
| PFOS | 7.1 ppt | 6 of 16 | 4 ppt MCL |
| PFHxA | 6.7 ppt | 9 of 16 | — |
| PFBA | 5.7 ppt | 1 of 16 | — |
| PFBS | 5.1 ppt | 11 of 16 | — |
| HFPO-DA (GenX) | not detected | 0 of 16 | — |
| PFDA | not detected | 0 of 16 | — |
| PFNA | not detected | 0 of 16 | — |
| PFHxS | not detected | 0 of 16 | — |
| PFHpA | not detected | 0 of 16 | — |
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 Chester
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 |
|---|---|---|
| Paoli Rail Yard Paoli, Pennsylvania · EPA ID PAD980692594 | Active (final NPL) | 2.1 mi |
| Foote Mineral Co. East Whiteland Township, Pennsylvania · EPA ID PAD077087989 | Active (final NPL) | 4.9 mi |
| Malvern TCE Malvern, Pennsylvania · EPA ID PAD014353445 | Active (final NPL) | 5.0 mi |
| A.I.W. Frank/Mid-County Mustang Exton, Pennsylvania · EPA ID PAD004351003 | Active (final NPL) | 5.7 mi |
| Commodore Semiconductor Group Lower Providence Township, Pennsylvania · EPA ID PAD093730174 | Active (final NPL) | 8.7 mi |
| Kimberton Kimberton Borough, Pennsylvania · EPA ID PAD980691703 | Active (final NPL) | 8.8 mi |
| Stanley Kessler King of Prussia, Pennsylvania · EPA ID PAD014269971 | Active (final NPL) | 9.0 mi |
| Henderson Road Upper Merion Township, Pennsylvania · EPA ID PAD009862939 | Active (final NPL) | 9.1 mi |
| Crater Resources, Inc./Keystone Coke Co./Alan Wood Steel Co. Upper Merion Township, Pennsylvania · EPA ID PAD980419097 | Active (final NPL) | 9.5 mi |
| Havertown PCP Haverford, Pennsylvania · EPA ID PAD002338010 | Active (final NPL) | 9.8 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 19353
Who supplies drinking water to ZIP 19353?
Aqua Pa Uwchlan (EPA ID PA1150035), a surface water (rivers, lakes) system serving about 35,518 people, listed by the state as serving this ZIP code.
Is there lead in Lionville, PA tap water?
The utility’s latest 90th-percentile lead result (Jun 2025) was 2.2 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 Lionville, PA 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. 6 PFAS compounds detected.
Has the water system in 19353 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 19353?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Paoli Rail Yard (2.1 mi, Active (final NPL)); Foote Mineral Co. (4.9 mi, Active (final NPL)); Malvern TCE (5.0 mi, Active (final NPL)).
Is radon a problem in Chester?
Chester is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.