Charlestown, RI Radon Mitigation and Testing

Q: What EPA Radon Zone is Charlestown in?

Charlestown is in Washington County, EPA Zone 1.

Q: How much does radon mitigation cost in Charlestown?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Washington County

EPA Zone 1

Nestled in Washington County along Rhode Island's southern coastal region, Charlestown benefits from marine influences and sandy coastal plain soils that generally moderate radon levels. Testing information for the 02813 zip code remains limited, encouraging residents to conduct independent radon assessments. The area's seasonal cottage communities and year-round homes, many built on crawl spaces or slabs due to coastal conditions, may have different radon accumulation patterns than inland properties.

Charlestown, RI Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Charlestown, RI Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Charlestown Radon Facts

Key details about the radon risk profile for Charlestown and the 02813 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Washington County, RI

Zip Code

02813

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Charlestown and the 02813 zip code are located in Washington County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Charlestown, RI

What EPA Radon Zone is Charlestown in?

Charlestown and the 02813 zip code are in Washington 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 Charlestown?

Radon mitigation in Charlestown 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 Charlestown?

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 Rhode Island

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Providence	11.00 pCi/L	2
Westerly	8.00 pCi/L	2
Portsmouth	4.50 pCi/L	2