Lewis, CO Radon Levels

Q: What EPA Radon Zone is Lewis in?

Lewis is in Montezuma County, EPA Zone 1.

Q: Why are radon readings shown from areas near Lewis?

No homeowner radon tests have been submitted for Lewis yet, so readings from the closest cities and the Montezuma County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Lewis?

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

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

Lewis, CO Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Montezuma County, CO

Zip Code 81327

Situated in Montezuma County in southwestern Colorado, Lewis sits at elevation where mountain geology can create varying radon conditions. Testing data remains limited for zip code 81327, making individual home testing particularly important in this rural area. Colorado's diverse geological formations and the prevalence of crawl space and basement foundations mean that radon testing should be a priority for all local residents.

7.33

pCi/L area average

Above EPA Action Level

Montezuma County average: 7.33 pCi/L, based on 6 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Lewis 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+

Lewis, CO 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 Lewis, CO

No homeowner tests have been submitted for Lewis 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
Cortez	11.9 mi	10.00 pCi/L	2
Mancos	22.8 mi	6.00 pCi/L	4
Durango	48.0 mi	10.67 pCi/L	3

Montezuma County Radon Profile

The bedrock and soils beneath Montezuma County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 2 cities in Montezuma County average 7.33 pCi/L across 6 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 Montezuma County.

Radon FAQ for Lewis, CO

What EPA Radon Zone is Lewis in?

Lewis and the 81327 zip code are in Montezuma County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Lewis?

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

Radon mitigation in Lewis 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 Lewis?

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.