Louisville, CO Radon Levels

Q: What EPA Radon Zone is Louisville in?

Louisville is in Boulder County, EPA Zone 1.

Q: How much does radon mitigation cost in Louisville?

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

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

Louisville, CO Radon Facts

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

County Boulder County, CO

Zip Code 80027

Situated in Boulder County along the Front Range foothills, Louisville sits on uranium-bearing formations that create high radon potential throughout the region. While specific local testing data is limited, the area's geology and elevation make radon testing essential for all residents. The community's mix of historic homes and newer developments in zip code 80027 should all be tested regardless of construction era.

10.17

pCi/L area average

Above EPA Action Level

Boulder County average: 10.17 pCi/L, based on 6 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Louisville 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+

Louisville, 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 Louisville, CO

No homeowner tests have been submitted for Louisville 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
Lafayette	2.9 mi	8.00 pCi/L	2
Broomfield	5.8 mi	5.00 pCi/L	1
Boulder	6.3 mi	12.00 pCi/L	1
Erie	6.9 mi	20.00 pCi/L	1
Arvada	10.5 mi	5.00 pCi/L	2
Longmont	12.8 mi	8.00 pCi/L	4
Commerce City	16.3 mi	9.00 pCi/L	1
Brighton	17.2 mi	6.00 pCi/L	2

Boulder County Radon Profile

Boulder County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Boulder County average 10.17 pCi/L across 6 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 Boulder County to test, as levels can differ between neighboring homes.

Radon FAQ for Louisville, CO

What EPA Radon Zone is Louisville in?

Louisville and the 80027 zip code are in Boulder 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 Louisville?

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

Radon mitigation in Louisville 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 Louisville?

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.