Langley, WA Radon Mitigation and Testing

Q: What is the average radon level in Langley, WA?

Based on 1 user-submitted tests, the average radon level is 2.00 pCi/L.

Q: What EPA Radon Zone is Langley in?

Langley is in Island County, EPA Zone 3.

Q: How much does radon mitigation cost in Langley?

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

Avg: 2.00 pCi/L

Island County

EPA Zone 3

1 user test

Located on Whidbey Island in Island County, Langley benefits from marine glacial deposits and proximity to Puget Sound, conditions that typically result in lower radon potential. Testing data for zip code 98260 remains limited, though the island's geology generally favors lower concentrations. The area's unique setting and mix of waterfront and inland properties make testing worthwhile for establishing individual baseline readings.

2.00

pCi/L average

Below EPA Action Level

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

4.0 EPA

10+

Langley, WA Radon Mitigation

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

Langley, WA Radon Testing

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

Langley, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
2 pCi/L	Langley, WA	0-20 Years	Partial Basement	May 2026

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

Langley Radon Facts

Key details about the radon risk profile for Langley and the 98260 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Island County, WA

Zip Code

98260

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

2.00 pCi/L

User Tests Submitted

Langley and the 98260 zip code are located in Island 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 Langley, WA

What is the average radon level in Langley, WA?

Based on 1 user-submitted test, the average radon level in Langley is 2.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Langley in?

Langley and the 98260 zip code are in Island 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 Langley?

Radon mitigation in Langley 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 Langley?

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
Olympia	7.00 pCi/L	5
Kent	3.60 pCi/L	5
Seattle	5.25 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