Home hazard report for 19731 — Port Penn, DE
ZIP 19731 has no mapped public water system — homes here most likely use private wells. New Castle County is in EPA radon zone 2.
Well water is not tested by any agency — test it yourself.
Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
The nearest active Superfund site is 5.9 miles away.
Active weather alerts
live from the National Weather ServiceChecking the National Weather Service…
Where ZIP 19731 is
Dashed: ZIP area · scroll or pinch to zoomDrinking water: probably a private well
No community water system’s service area covers the center of ZIP 19731, 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 New Castle County
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 →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Relatively Moderate, with very low social vulnerability and relatively high community resilience.
FEMA National Risk Index (December 2025): expected annual losses from each hazard combined with social vulnerability and community resilience, rated relative to all U.S. census tracts. Hazards not listed are not applicable here. It describes the area, not a single building; flood insurance maps (FEMA FIRMs) decide flood-insurance requirements.
Live conditions: river gauges and flood levels · tornado warnings · wildfire detections · earthquakes — our sister maps, updated from NOAA, USGS and NASA every few minutes.
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Sealand Limited Mount Pleasant, Delaware · EPA ID DED981035520 | Cleaned up & deleted | 5.8 mi |
| Delaware City PVC Plant Delaware City, Delaware · EPA ID DED980551667 | Active (final NPL) | 5.9 mi |
| Standard Chlorine of Delaware, Inc. Delaware City, Delaware · EPA ID DED041212473 | Active (final NPL) | 6.5 mi |
| Tybouts Corner Landfill New Castle County, Delaware · EPA ID DED000606079 | Active (final NPL) | 7.6 mi |
| Delaware Sand & Gravel Landfill New Castle County, Delaware · EPA ID DED000605972 | Active (final NPL) | 9.8 mi |
| Army Creek Landfill New Castle County, Delaware · EPA ID DED980494496 | 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 19731
Does ZIP 19731 have public water?
No community water system service area covers the center of ZIP 19731, 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.
What natural hazards affect ZIP 19731?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Moderate; the highest-rated hazards are coastal flooding (relatively high), riverine flooding (relatively high), winter weather (relatively high).
Are there Superfund sites near 19731?
The nearest active Superfund site is 5.9 miles away. Sites within 10 miles: Sealand Limited (5.8 mi, Cleaned up & deleted); Delaware City PVC Plant (5.9 mi, Active (final NPL)); Standard Chlorine of Delaware, Inc. (6.5 mi, Active (final NPL)).
Is radon a problem in New Castle County?
New Castle County 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.