Crystal City, MO Radon Levels

Q: What EPA Radon Zone is Crystal City in?

Crystal City is in Jefferson County, EPA Zone 2.

Q: How much does radon mitigation cost in Crystal City?

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

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

Crystal City, MO Radon Facts

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

County Jefferson County, MO

Zip Code 63019

Situated in Jefferson County within the St. Louis Metro area, Crystal City lies along the Mississippi River corridor where alluvial deposits meet underlying limestone formations. While comprehensive radon testing data remains limited for zip code 63019, the geological conditions common to eastern Missouri suggest potential for elevated indoor radon levels. Homeowners in this area should prioritize radon testing, particularly in homes with basements or crawl spaces.

8.86

pCi/L area average

Above EPA Action Level

Jefferson County average: 8.86 pCi/L, based on 7 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Crystal City 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+

Crystal City, 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 Crystal City, MO

No homeowner tests have been submitted for Crystal City 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
Festus	3.8 mi	5.00 pCi/L	2
De Soto	12.0 mi	11.00 pCi/L	1
Imperial	12.6 mi	13.00 pCi/L	1
Arnold	13.9 mi	10.50 pCi/L	2
House Springs	15.8 mi	7.00 pCi/L	1
Fenton	19.3 mi	16.00 pCi/L	2
Bonne Terre	23.2 mi	4.50 pCi/L	2
Ballwin	26.5 mi	4.00 pCi/L	1

Jefferson County Radon Profile

Jefferson 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 5 cities in Jefferson County average 8.86 pCi/L across 7 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 Jefferson County.

Radon FAQ for Crystal City, MO

What EPA Radon Zone is Crystal City in?

Crystal City and the 63019 zip code are in Jefferson 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 Crystal City?

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

Radon mitigation in Crystal City 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 Crystal City?

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.