Basalt, CO Radon Levels

Q: What EPA Radon Zone is Basalt in?

Basalt is in Eagle County, EPA Zone 2.

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

No homeowner radon tests have been submitted for Basalt yet, so readings from the closest cities and the Eagle 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 Basalt?

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

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

Basalt, CO Radon Facts

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

County Eagle County, CO

Zip Code 81621

Located in Eagle County in Colorado's high country, Basalt sits within EPA Zone 2 where moderate radon potential is typical. The area's mountainous geology and elevation contribute to variable radon conditions across zip code 81621's diverse housing stock. With limited testing data available for this resort community, homeowners should conduct radon testing to understand their individual property's risk profile.

6.33

pCi/L area average

Above EPA Action Level

Eagle County average: 6.33 pCi/L, based on 6 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Basalt 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+

Basalt, 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 Basalt, CO

No homeowner tests have been submitted for Basalt 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
Aspen	14.4 mi	4.00 pCi/L	1
Edwards	18.5 mi	6.75 pCi/L	4
Glenwood Springs	21.2 mi	8.00 pCi/L	1
Gypsum	21.4 mi	5.00 pCi/L	1
New Castle	32.7 mi	4.00 pCi/L	1
Crested Butte	33.5 mi	8.56 pCi/L	9
Leadville	38.0 mi	5.67 pCi/L	3
Vail	41.5 mi	6.00 pCi/L	1

Eagle County Radon Profile

EPA mapping assigns Eagle County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 3 cities in Eagle County average 6.33 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Eagle County home regardless of zone or a neighbor's results.

Radon FAQ for Basalt, CO

What EPA Radon Zone is Basalt in?

Basalt and the 81621 zip code are in Eagle 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 Basalt?

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

Radon mitigation in Basalt 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 Basalt?

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.