Saint James, MO Radon Levels

Q: What EPA Radon Zone is Saint James in?

Saint James is in Phelps County, EPA Zone 2.

Q: How much does radon mitigation cost in Saint James?

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

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

Saint James, MO Radon Facts

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

County Phelps County, MO

Zip Code 65559

Set in the Missouri Ozarks within Phelps County, Saint James falls under EPA Zone 2 classification with moderate radon potential expected across the 65559 zip code. Testing data for this area remains limited despite the region's underlying limestone and dolomite formations. The community's mix of older homes and newer construction, combined with Missouri's variable geological conditions, makes individual radon testing the most reliable method for determining exposure levels.

4.50

pCi/L area average

Above EPA Action Level

Phelps County average: 4.50 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Saint James itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Saint James, MO Radon Mitigation

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

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Radon Readings Near Saint James, MO

No homeowner tests have been submitted for Saint James yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Rolla	9.2 mi	4.50 pCi/L	2
Cuba	12.4 mi	5.00 pCi/L	1
Leasburg	17.9 mi	4.00 pCi/L	1
Bourbon	23.9 mi	6.00 pCi/L	1
Salem	27.2 mi	6.00 pCi/L	1
Saint Robert	31.0 mi	7.00 pCi/L	1
Waynesville	36.8 mi	7.00 pCi/L	2
Union	44.0 mi	13.00 pCi/L	1

Phelps County Radon Profile

Phelps County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 1 city in Phelps County average 4.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Phelps County.

Radon FAQ for Saint James, MO

What EPA Radon Zone is Saint James in?

Saint James and the 65559 zip code are in Phelps 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.

Why are radon readings shown from areas near Saint James?

No homeowner radon tests have been submitted for Saint James yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Phelps County average—are the best available indicator of local conditions until Saint James homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Saint James?

Radon mitigation in Saint James 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 Saint James?

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.