Home hazard report for 21911 — Rising Sun, MD
ZIP 21911 has no mapped public water system — homes here most likely use private wells. Cecil 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 4.8 miles away.
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Where ZIP 21911 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 21911, 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 Cecil 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 Low, with relatively low social vulnerability and relatively moderate 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 |
|---|---|---|
| Woodlawn County Landfill Woodlawn, Maryland · EPA ID MDD980504344 | Active (final NPL) | 4.8 mi |
| Ordnance Products, Inc. Cecil County, Maryland · EPA ID MDD982364341 | Active (final NPL) | 7.3 mi |
| Spectron, Inc. Elkton, Maryland · EPA ID MDD000218008 | Active (final NPL) | 8.2 mi |
| Sand, Gravel and Stone Elkton, Maryland · EPA ID MDD980705164 | Active (final NPL) | 9.1 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 21911
Does ZIP 21911 have public water?
No community water system service area covers the center of ZIP 21911, 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 21911?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Low; the highest-rated hazards are strong wind (relatively high), winter weather (relatively high), drought (relatively moderate).
Are there Superfund sites near 21911?
The nearest active Superfund site is 4.8 miles away. Sites within 10 miles: Woodlawn County Landfill (4.8 mi, Active (final NPL)); Ordnance Products, Inc. (7.3 mi, Active (final NPL)); Spectron, Inc. (8.2 mi, Active (final NPL)).
Is radon a problem in Cecil County?
Cecil 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.