Williston, ND Radon Mitigation and Testing

Q: What is the average radon level in Williston, ND?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Williston in?

Williston is in Williams County, EPA Zone 1.

Q: How much does radon mitigation cost in Williston?

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

Avg: 4.00 pCi/L

Williams County

EPA Zone 1

1 user test

Positioned in Williams County in the heart of North Dakota's Bakken oil region, Williston recorded an average radon level of 4.0 pCi/L from available testing data. This reading sits right at the EPA action threshold, reflecting the area's glacial till and sedimentary bedrock that can facilitate radon gas production. Given the community's rapid growth and mix of new construction with traditional prairie home styles, residents should prioritize professional radon testing.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Williston, ND. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Williston, ND Radon Mitigation

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

Williston, ND Radon Testing

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

Williston, North Dakota Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Williston, ND	0-20 Years	Full Basement	Dec 2018

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

Williston Radon Facts

Key details about the radon risk profile for Williston and the 58801 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Williams County, ND

Zip Code

58801

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Williston and the 58801 zip code are located in Williams 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 Williston, ND

What is the average radon level in Williston, ND?

Based on 1 user-submitted test, the average radon level in Williston is 4.00 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 Williston in?

Williston and the 58801 zip code are in Williams 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 Williston?

Radon mitigation in Williston 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 Williston?

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 North Dakota

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

City	Avg User Radon Level	Submissions
Grand Forks	13.50 pCi/L	8
Grafton	7.67 pCi/L	3
Dickinson	6.00 pCi/L	3
Watford City	5.50 pCi/L	2
Bismarck	No submissions	0