Johnstown, CO Radon Mitigation and Testing

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

Based on 4 user-submitted tests, the average radon level is 9.50 pCi/L.

Q: What EPA Radon Zone is Johnstown in?

Johnstown is in Weld County, EPA Zone 1.

Q: How much does radon mitigation cost in Johnstown?

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

Avg: 9.50 pCi/L

Weld County

EPA Zone 1

4 user tests

This Weld County community in the Fort Collins and Greeley metro areas shows an average radon level of 9.5 pCi/L, significantly exceeding the EPA's 4.0 pCi/L action threshold. The area's Pierre Shale formations and uranium-rich soils, combined with the region's newer suburban housing stock in zip code 80534, create conditions where radon mitigation is often necessary.

9.50

pCi/L average

Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Johnstown, CO. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Johnstown, CO Radon Mitigation

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

Johnstown, CO Radon Testing

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

Johnstown, Colorado Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
14 pCi/L	Johnstown, CO	21-50 Years	Full Basement	Oct 2021
4 pCi/L	Johnstown, CO	21-50 Years	Full Basement	Dec 2020
6 pCi/L	Johnstown, CO	0-20 Years	Full Basement	Oct 2016

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

Johnstown Radon Facts

Key details about the radon risk profile for Johnstown and the 80534 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Weld County, CO

Zip Code

80534

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.50 pCi/L

User Tests Submitted

Johnstown and the 80534 zip code are located in Weld 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 Johnstown, CO

What is the average radon level in Johnstown, CO?

Based on 4 user-submitted tests, the average radon level in Johnstown is 9.50 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 Johnstown in?

Johnstown and the 80534 zip code are in Weld 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 Johnstown?

Radon mitigation in Johnstown 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 Johnstown?

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