Ilwaco, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Ilwaco in?

Ilwaco is in Pacific County, EPA Zone 3.

Q: How much does radon mitigation cost in Ilwaco?

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

Pacific County

EPA Zone 3

Positioned on Washington's Long Beach Peninsula in Pacific County, Ilwaco sits on coastal sand dunes and marine deposits that typically produce lower radon levels. Testing data for zip code 98624 remains limited, though the area's sandy soils and ocean proximity generally reduce radon accumulation potential. Even in coastal settings, individual homes can occasionally have elevated readings, making testing a prudent choice for homeowners.

Ilwaco, WA Radon Mitigation

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

Ilwaco, WA Radon Testing

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

Ilwaco Radon Facts

Key details about the radon risk profile for Ilwaco and the 98624 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Pacific County, WA

Zip Code

98624

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Ilwaco and the 98624 zip code are located in Pacific 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 Ilwaco, WA

What EPA Radon Zone is Ilwaco in?

Ilwaco and the 98624 zip code are in Pacific 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 Ilwaco?

Radon mitigation in Ilwaco 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 Ilwaco?

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