Portsmouth, RI Radon Levels

Q: What is the average radon level in Portsmouth, RI?

Based on 2 user-submitted tests, the average radon level is 4.50 pCi/L.

Q: What EPA Radon Zone is Portsmouth in?

Portsmouth is in Newport County, EPA Zone 2.

Q: How much does radon mitigation cost in Portsmouth?

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

Check local Portsmouth radon levels and find certified testing and mitigation professionals to keep your home safe

Portsmouth, RI Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Newport County, RI

Zip Code 02871

Avg. User Level 4.50 pCi/L

User Tests 2

Located in Newport County on Aquidneck Island, this coastal community averages 4.5 pCi/L based on 2 test results, exceeding the EPA action level. Zip code 02871's readings range from 4.0 to 5.0 pCi/L, indicating that professional mitigation should be considered for affected homes. The area's mix of historic colonial homes and waterfront properties can trap radon despite the coastal location.

4.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Portsmouth, RI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Portsmouth, RI Radon Mitigation

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

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Portsmouth, Rhode Island Radon Levels

User-submitted radon test readings from homes in the Portsmouth area.

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Portsmouth, RI	100+ Years	Partial Basement	May 2022
4 pCi/L	Portsmouth, RI	0-20 Years	Full Basement	Jan 2022

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Radon FAQ for Portsmouth, RI

What is the average radon level in Portsmouth, RI?

Based on 2 user-submitted tests, the average radon level in Portsmouth is 4.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Portsmouth in?

Portsmouth and the 02871 zip code are in Newport County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Portsmouth?

Radon mitigation in Portsmouth 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 Portsmouth?

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 in Rhode Island with the most user-submitted radon test data, ranked by number of submissions.

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