Augusta, MO Radon Levels

Q: What EPA Radon Zone is Augusta in?

Augusta is in St Charles County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Augusta?

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

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

Augusta, MO Radon Facts

EPA Radon Zone Unknown Unknown

County St Charles County, MO

Zip Code 63332

Augusta's location in St. Charles County places it within the greater St. Louis Metro region, where Missouri River valley geology creates variable radon conditions. The area's limestone bedrock and river terrace deposits can produce unpredictable radon levels from one property to the next. Since testing data for zip code 63332 is currently unavailable, homeowners should prioritize radon measurement, especially in homes with basements or those built in areas with known geological variability.

6.63

pCi/L area average

Above EPA Action Level

St Charles County average: 6.63 pCi/L, based on 8 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Augusta 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+

Augusta, MO Radon Mitigation

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

Need Radon Mitigation or Testing in Augusta?

100% Free, No-Obligation Quotes
Matches You with State-Licensed St Charles County Pros

1-800-299-3578 636-205-4618 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Augusta, MO

No homeowner tests have been submitted for Augusta 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
Labadie	3.7 mi	4.00 pCi/L	1
Union	11.6 mi	13.00 pCi/L	1
Lake Saint Louis	16.1 mi	5.00 pCi/L	2
O Fallon	16.8 mi	7.75 pCi/L	4
Chesterfield	17.2 mi	5.00 pCi/L	1
Ballwin	18.4 mi	4.00 pCi/L	1
New Haven	18.8 mi	5.00 pCi/L	1
Saint Peters	20.0 mi	7.00 pCi/L	1

St Charles County Radon Profile

A specific EPA radon zone has not been established for St Charles County, which is why testing is advised for all homes here irrespective of geology. Homeowner-submitted tests from 5 cities in St Charles County average 6.63 pCi/L across 8 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in St Charles County to test, as levels can differ between neighboring homes.

Radon FAQ for Augusta, MO

What EPA Radon Zone is Augusta in?

Augusta and the 63332 zip code are in St Charles 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 Augusta?

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

Radon mitigation in Augusta 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 Augusta?

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.