Monrovia, MD Radon Levels
Check local Monrovia radon levels and find certified testing and mitigation professionals to keep your home safe
Monrovia, MD Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Frederick County, MD
Zip Code
21770
Located in Frederick County within the Washington Metro area (21770), Monrovia sits on the Piedmont plateau where crystalline bedrock formations can contribute to elevated radon levels. While specific testing data is limited, the area's growing suburban development and geological characteristics suggest residents should prioritize radon testing, particularly in newer homes with basements.
Monrovia, MD Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Monrovia, MD
What EPA Radon Zone is Monrovia in?
Monrovia and the 21770 zip code are in Frederick County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Monrovia?
Radon mitigation in Monrovia typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Monrovia?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
Most Active Radon Markets in Maryland
Cities in Maryland with the most user-submitted radon test data, ranked by number of submissions.
| 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 |
| Frostburg | 8.67 pCi/L | 3 |