Home hazard report for 19429 — Conshohocken, PA
ZIP 19429 is served by Aqua Pa Main System: 2 violations since 2016, latest lead result 0 ppb, PFAS 12.6 ppt. Montgomery is in EPA radon zone 1.
Health-based violations since 2016: Groundwater Rule, Revised Total Coliform Rule. All are listed as resolved.
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. 9 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 19429 is
blue: utility service area · scroll or pinch to zoomDrinking water: Aqua Pa Main System
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Groundwater Rule | 1 |
| Revised Total Coliform Rule | 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 Nov 2024.
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 |
|---|---|---|---|
| PFPeA | 21.8 ppt | 43 of 50 | — |
| PFHxA | 17.2 ppt | 42 of 50 | — |
| PFOA | 12.6 ppt | 35 of 50 | 4 ppt MCL |
| PFNA | 12 ppt | 7 of 50 | — |
| PFBA | 10.1 ppt | 20 of 50 | — |
| PFBS | 9.5 ppt | 35 of 50 | — |
| PFOS | 9.2 ppt | 16 of 50 | 4 ppt MCL |
| PFHxS | 7.7 ppt | 11 of 50 | — |
| PFHpA | 6.9 ppt | 16 of 50 | — |
| HFPO-DA (GenX) | not detected | 0 of 50 | — |
| PFDA | not detected | 0 of 50 | — |
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 Montgomery
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 |
|---|---|---|
| Crater Resources, Inc./Keystone Coke Co./Alan Wood Steel Co. Upper Merion Township, Pennsylvania · EPA ID PAD980419097 | Active (final NPL) | 2.2 mi |
| Stanley Kessler King of Prussia, Pennsylvania · EPA ID PAD014269971 | Active (final NPL) | 2.8 mi |
| Henderson Road Upper Merion Township, Pennsylvania · EPA ID PAD009862939 | Active (final NPL) | 2.9 mi |
| Tysons Dump Upper Merion Township, Pennsylvania · EPA ID PAD980692024 | Active (final NPL) | 3.9 mi |
| Ambler Asbestos Piles Ambler, Pennsylvania · EPA ID PAD000436436 | Cleaned up & deleted | 6.3 mi |
| BoRit Asbestos Ambler, Pennsylvania · EPA ID PAD981034887 | Active (final NPL) | 6.4 mi |
| Havertown PCP Haverford, Pennsylvania · EPA ID PAD002338010 | Active (final NPL) | 6.7 mi |
| Commodore Semiconductor Group Lower Providence Township, Pennsylvania · EPA ID PAD093730174 | Active (final NPL) | 7.0 mi |
| North Penn - Area 12 Worcester, Pennsylvania · EPA ID PAD057152365 | Active (final NPL) | 7.5 mi |
| Moyers Landfill Eagleville, Pennsylvania · EPA ID PAD980508766 | Cleaned up & deleted | 8.7 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 19429
Who supplies drinking water to ZIP 19429?
Aqua Pa Main System (EPA ID PA1460073), a surface water (rivers, lakes) system serving about 822,600 people.
Is there lead in Conshohocken, PA tap water?
The utility’s latest 90th-percentile lead result (Jun 2025) 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 Conshohocken, 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. 9 PFAS compounds detected.
Has the water system in 19429 had violations?
Health-based violations since 2016: Groundwater Rule, Revised Total Coliform Rule. All are listed as resolved.
Are there Superfund sites near 19429?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Crater Resources, Inc./Keystone Coke Co./Alan Wood Steel Co. (2.2 mi, Active (final NPL)); Stanley Kessler (2.8 mi, Active (final NPL)); Henderson Road (2.9 mi, Active (final NPL)).
Is radon a problem in Montgomery?
Montgomery is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.