Washougal, WA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 8.00 pCi/L.

Q: What EPA Radon Zone is Washougal in?

Washougal is in Clark County, EPA Zone 1.

Q: How much does radon mitigation cost in Washougal?

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

Avg: 8.00 pCi/L

Clark County

EPA Zone 1

1 user test

Set in Clark County within the Portland Metro area, this Washington community shows an average radon level of 8.0 pCi/L based on initial testing data. This reading significantly exceeds the EPA action level, indicating residents in zip code 98671 should prioritize radon testing and mitigation. The area sits on Columbia River basalt formations that can trap radon gas in homes with basement or crawl space foundations.

8.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Washougal, WA Radon Mitigation

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

Washougal, WA Radon Testing

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

Washougal, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
8 pCi/L	Washougal, WA	21-50 Years	No Basement/All Slab	Jun 2022

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

Washougal Radon Facts

Key details about the radon risk profile for Washougal and the 98671 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Clark County, WA

Zip Code

98671

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

8.00 pCi/L

User Tests Submitted

Washougal and the 98671 zip code are located in Clark 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 Washougal, WA

What is the average radon level in Washougal, WA?

Based on 1 user-submitted test, the average radon level in Washougal is 8.00 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 Washougal in?

Washougal and the 98671 zip code are in Clark 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 Washougal?

Radon mitigation in Washougal 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 Washougal?

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