Warrenton, MO Radon Levels

Q: What EPA Radon Zone is Warrenton in?

Warrenton is in Warren County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Warrenton?

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

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

Warrenton, MO Radon Facts

EPA Radon Zone Unknown Unknown

County Warren County, MO

Zip Code 63383

Located along the Missouri River in Warren County within the St. Louis Metro area, Warrenton sits on limestone bluffs that can produce elevated radon levels. Testing data remains limited for this 63383 ZIP code community, making home-specific radon assessment important for residents. The area's mix of older rivertown homes and suburban development, many featuring full basements, provides pathways for radon entry from the underlying Ordovician limestone.

6.94

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.94 pCi/L, based on 17 tests from 10 nearby cities. No readings have been submitted for Warrenton yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Warrenton, 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 Warrenton, MO

No homeowner tests have been submitted for Warrenton 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
New Haven	16.2 mi	5.00 pCi/L	1
Troy	17.7 mi	8.50 pCi/L	4
Lake Saint Louis	20.9 mi	5.00 pCi/L	2
O Fallon	23.6 mi	7.75 pCi/L	4
Labadie	25.4 mi	4.00 pCi/L	1
Union	26.2 mi	13.00 pCi/L	1
Saint Peters	29.7 mi	7.00 pCi/L	1
Saint Charles	33.2 mi	5.00 pCi/L	1

Warren County Radon Profile

Warren County has not been assigned a definitive EPA radon zone, so the agency recommends that every home be tested regardless of predicted risk. User-submitted readings are still sparse within Warren County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. 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 Warren County.

Radon FAQ for Warrenton, MO

What EPA Radon Zone is Warrenton in?

Warrenton and the 63383 zip code are in Warren County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

Why are radon readings shown from areas near Warrenton?

No homeowner radon tests have been submitted for Warrenton yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Warren County average—are the best available indicator of local conditions until Warrenton 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 Warrenton?

Radon mitigation in Warrenton 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 Warrenton?

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.