Dolores, CO Radon Levels

Q: What EPA Radon Zone is Dolores in?

Dolores is in Montezuma County, EPA Zone 1.

Q: How much does radon mitigation cost in Dolores?

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

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

Dolores, CO Radon Facts

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

County Montezuma County, CO

Zip Code 81323

Nestled in Montezuma County in southwestern Colorado's high country, Dolores falls within EPA Zone 1 where uranium-bearing rock formations and high elevation create significant radon potential. With testing data currently unavailable for this 81323 community, residents should prioritize radon testing given the geological conditions. The area's mix of older homes and newer mountain construction, often with basements built into hillsides, may be particularly prone to radon infiltration.

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 Dolores 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+

Dolores, 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 Dolores, CO

No homeowner tests have been submitted for Dolores 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	9.9 mi	10.00 pCi/L	2
Mancos	12.6 mi	6.00 pCi/L	4
Durango	37.5 mi	10.67 pCi/L	3
Telluride	48.3 mi	6.80 pCi/L	5
Bayfield	49.2 mi	6.00 pCi/L	6

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 Dolores, CO

What EPA Radon Zone is Dolores in?

Dolores and the 81323 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 Dolores?

No homeowner radon tests have been submitted for Dolores 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 Dolores 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 Dolores?

Radon mitigation in Dolores 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 Dolores?

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.