Dupont, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Dupont in?

Dupont is in Pierce County, EPA Zone 3.

Q: How much does radon mitigation cost in Dupont?

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

Pierce County

EPA Zone 3

Dupont in Pierce County benefits from its location in the Seattle Metro area, where Puget Sound glacial deposits and marine sediments generally produce lower radon levels. However, the diverse housing stock in zip code 98327 ranges from historic military housing to modern developments with varying foundation designs. While testing data remains limited, Washington homeowners should still test for radon as geological conditions can vary significantly even within the same neighborhood.

Dupont, WA Radon Mitigation

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

Dupont, WA Radon Testing

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

Dupont Radon Facts

Key details about the radon risk profile for Dupont and the 98327 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Pierce County, WA

Zip Code

98327

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Dupont and the 98327 zip code are located in Pierce County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Dupont, WA

What EPA Radon Zone is Dupont in?

Dupont and the 98327 zip code are in Pierce County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Dupont?

Radon mitigation in Dupont 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 Dupont?

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 Washington

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

City	Avg User Radon Level	Submissions
Vancouver	6.56 pCi/L	9
Kent	3.60 pCi/L	5
Seattle	5.25 pCi/L	4
Olympia	5.00 pCi/L	4
Bellevue	3.75 pCi/L	4
Spokane	11.67 pCi/L	3
Camas	8.00 pCi/L	3
Centralia	7.00 pCi/L	3
Bellingham	4.50 pCi/L	2
Kirkland	4.50 pCi/L	2
Washougal	8.00 pCi/L	1
Ridgefield	5.00 pCi/L	1
Moses Lake	No submissions	0