Home hazard report for 20693 — Welcome, MD
ZIP 20693 has no mapped public water system — homes here most likely use private wells. Charles 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 9.7 miles away.
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Where ZIP 20693 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 20693, 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 Charles 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 Very Low, with relatively moderate social vulnerability and very 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 |
|---|---|---|
| Naval Surface Warfare - Dahlgren Dahlgren, Virginia · EPA ID VA7170024684 | Active (final NPL) | 9.7 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 20693
Does ZIP 20693 have public water?
No community water system service area covers the center of ZIP 20693, 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 20693?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Very Low; the highest-rated hazards are coastal flooding (relatively moderate), drought (relatively moderate), lightning (relatively moderate).
Are there Superfund sites near 20693?
The nearest active Superfund site is 9.7 miles away. Sites within 10 miles: Naval Surface Warfare - Dahlgren (9.7 mi, Active (final NPL)).
Is radon a problem in Charles County?
Charles 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.