Denver, CO Radon Mitigation and Testing

Q: What is the average radon level in Denver, CO?

Based on 9 user-submitted tests, the average radon level is 6.20 pCi/L.

Q: What EPA Radon Zone is Denver in?

Denver is in Denver County, EPA Zone 1.

Q: How much does radon mitigation cost in Denver?

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

Avg: 6.20 pCi/L

Denver County

EPA Zone 1

9 user tests

Denver is located in Denver County, Colorado. With 9 user-submitted readings averaging 6.20 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 80202 zip code.

6.20

pCi/L average

Above EPA Action Level

Based on 9 user-submitted radon tests for homes in Denver, CO. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Denver, CO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Denver, CO Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Denver, Colorado Radon Levels

User-submitted radon test readings from homes in the Denver area.

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Denver, CO	0-20 Years	No Basement/All Crawl Space	Oct 2024
8 pCi/L	Denver, CO	51-99 Years	Partial Basement	Feb 2024
4 pCi/L	Denver, CO	21-50 Years	Full Basement	Jan 2024
9 pCi/L	Denver, CO	51-99 Years	No Basement/All Crawl Space	Dec 2021
5 pCi/L	Denver, CO	100+ Years	Full Basement	Jan 2020

Have a radon test result for Denver? Submit your reading to help other homeowners.

Denver Radon Facts

Key details about the radon risk profile for Denver and the 80202 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Denver County, CO

Zip Code

80202

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.20 pCi/L

User Tests Submitted

Denver and the 80202 zip code are located in Denver County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Denver, CO

What is the average radon level in Denver, CO?

Based on 9 user-submitted tests, the average radon level in Denver is 6.20 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Denver in?

Denver and the 80202 zip code are in Denver 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.

How much does radon mitigation cost in Denver?

Radon mitigation in Denver 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 Denver?

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.

Most Active Radon Markets in Colorado

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Fairplay	12.00 pCi/L	9
Crested Butte	8.56 pCi/L	9
Denver	6.22 pCi/L	9
Montrose	9.25 pCi/L	8
Gunnison	7.38 pCi/L	8
Buena Vista	12.57 pCi/L	7
Pueblo	10.67 pCi/L	6
Grand Junction	8.17 pCi/L	6
Bayfield	6.00 pCi/L	6
Canon City	10.80 pCi/L	5
Aurora	7.40 pCi/L	5
Windsor	7.00 pCi/L	5
Telluride	6.80 pCi/L	5
Parker	5.40 pCi/L	5
Salida	15.50 pCi/L	4
Johnstown	9.50 pCi/L	4
Granby	9.00 pCi/L	4
Longmont	8.00 pCi/L	4
Edwards	6.75 pCi/L	4
Mancos	6.00 pCi/L	4