ZIP code areaZIP center Water utility service area PFOA/PFOS ≥ 4 ppt Lead > 15 ppb 5+ violations Superfund site (active) proposed cleaned up Circles: other water systems flagged nearby; size = people served. Tap any symbol for details.

Drinking water: probably a private well

No community water system’s service area covers the center of ZIP 19366, and no system lists it. In rural areas that usually means private wells. The EPA does not regulate private wells: owners should test once a year for coliform bacteria and nitrate, and every few years for arsenic, lead, uranium and other local concerns. Your county health department can recommend a certified lab.

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
Strasburg Landfill Newlin Township, Pennsylvania · EPA ID PAD000441337	Cleaned up & deleted	8.1 mi
Hockessin Groundwater Hockessin, Delaware · EPA ID DEN000303920	Active (final NPL)	8.7 mi
A.I.W. Frank/Mid-County Mustang Exton, Pennsylvania · EPA ID PAD004351003	Active (final NPL)	9.2 mi
Foote Mineral Co. East Whiteland Township, Pennsylvania · EPA ID PAD077087989	Active (final NPL)	9.9 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 19366

Does ZIP 19366 have public water?

No community water system service area covers the center of ZIP 19366, and none lists it. Homes here most likely use private wells, which no agency tests — owners should test yearly for bacteria and nitrate, and every few years for arsenic, lead and other local concerns.

Are there Superfund sites near 19366?

The nearest active Superfund site is 8.7 miles away. Sites within 10 miles: Strasburg Landfill (8.1 mi, Cleaned up & deleted); Hockessin Groundwater (8.7 mi, Active (final NPL)); A.I.W. Frank/Mid-County Mustang (9.2 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.