Upper Marlboro, MD Radon Mitigation and Testing
Serving as the county seat of Prince George's County in the Washington Metro area, Upper Marlboro shows concerning radon levels across zip codes 20772 and 20774. Local testing reveals an average of 15.0 pCi/L, significantly exceeding the EPA's 4.0 pCi/L action level and requiring immediate mitigation attention. Professional radon testing and remediation are essential for all area homeowners.
Based on 3 user-submitted radon tests for homes in Upper Marlboro, MD. The EPA recommends taking action at or above 4.0 pCi/L.
Upper Marlboro, MD Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Upper Marlboro, MD Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Upper Marlboro, Maryland Radon Levels
User-submitted radon test readings from homes in the Upper Marlboro area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 20 pCi/L | Upper Marlboro, MD | 21-50 Years | Partial Basement | Sep 2025 |
| 5 pCi/L | Upper Marlboro, MD | 51-99 Years | Full Basement | Dec 2020 |
| 20 pCi/L | Upper Marlboro, MD | 0-20 Years | — | May 2016 |
Have a radon test result for Upper Marlboro? Submit your reading to help other homeowners.
Upper Marlboro Radon Facts
Key details about the radon risk profile for Upper Marlboro and the 20772 zip code area.
Upper Marlboro and the 20772 zip code are located in Prince George's County, which has an EPA assigned Radon Zone of Unknown. A radon zone of Unknown does not have sufficient data for classification. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Upper Marlboro, MD
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Most Active Radon Markets in Maryland
Cities with the most user-submitted radon test data in the state.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Frederick | 8.29 pCi/L | 7 |
| Potomac | 9.00 pCi/L | 6 |
| Hagerstown | 8.67 pCi/L | 6 |
| Westminster | 14.50 pCi/L | 4 |
| Baltimore | 7.00 pCi/L | 4 |
| Annapolis | 4.25 pCi/L | 4 |
| Upper Marlboro | 15.00 pCi/L | 3 |
| Edgewater | 12.67 pCi/L | 3 |
| Bowie | 9.00 pCi/L | 3 |
| Clarksburg | 8.00 pCi/L | 3 |
| Gambrills | 6.00 pCi/L | 3 |
| Elkton | 5.33 pCi/L | 3 |
| Silver Spring | 4.33 pCi/L | 3 |
| Chesapeake Beach | 14.00 pCi/L | 2 |
| Cumberland | 9.00 pCi/L | 2 |
| Frostburg | 9.00 pCi/L | 2 |
| Owings | 5.50 pCi/L | 2 |
| Huntingtown | 4.50 pCi/L | 2 |
| Mc Henry | 20.00 pCi/L | 1 |
| Mount Airy | 20.00 pCi/L | 1 |