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Radon Levels in Wahkiakum County, Washington

EPA puts Wahkiakum County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
Zone 3Lower predicted potential
Measured
0.0%of 1 test reported to CDC (2020) was at or above 4 pCi/L
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Wahkiakum County, At a glance

Wahkiakum County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.

What EPA predicts hereScreening level, geology

EPA predicts an average indoor of less than 2 pCi/L (less than 75 Bq/m³) across the county as a whole.

USGS geologic potential: Low across 92% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Wahkiakum County, 2020

Tests reported
1
At or above 4 pCi/L
0.0%
Median result
0.1 pCi/L
Reported results by concentration band, Wahkiakum County, 2020
Under 2 pCi/L: 100%2 to 4 pCi/L: 0%4 pCi/L and above: 0%

Of 1 pre-mitigation test reported to CDC, not homes in this area.

Reported results by concentration band, Wahkiakum County, 2020: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1100.0%
2 to 4 pCi/L00.0%
4 pCi/L and above00.0%

CDC publishes this figure only for counties here, so there is no state or national number to compare Wahkiakum County, Washington with.

What these figures count

Distribution of radon tests reported to CDC, not this house. People testing before a sale, or because they suspect a problem, are over-represented in any reported testing data.

The figures at the top are for 2020: a percentage there is a share of radon tests reported to CDC for Wahkiakum County in 2020, and a percentage in a view below is a share of the tests reported for the year or period it names. It is not a share of homes in Wahkiakum County, and it is not a random sample: it counts only the tests people chose to run and that were reported.

CDC works out the shares and the median over pre-mitigation tests, counting a test not marked as before or after mitigation as one of them (1 for 2020). The median is the middle result of those tests, not of buildings.

Wahkiakum County's own published CDC figures beside those of the counties that border it, for the same period.

Each figure is that county’s own published CDC figure for 2020, counting radon tests reported to CDC, not homes. Wahkiakum County is this page. Nothing is averaged or combined across counties. The test count beside each county is CDC’s published number of pre-mitigation tests behind its figures. Figures from few tests can swing widely from year to year. Every Washington county’s own figure is in the Washington county table.

Measured: CDC tracking data. Figure above: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

Radon Action Brief

National Radon Action MonthPre-sale

Wahkiakum County's radon brief, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Wahkiakum County BriefSee a free sample

Area data, not a test of the building.

Local help

Wahkiakum County, Local resources

Radon testing and mitigation in Wahkiakum County

Who tests and fixes radon in Wahkiakum County: listed businesses, Washington's radon program and test kits.

What Washington's program says
Phone
360-236-3200
Email
doh.radon@doh.wa.gov

What it means

Wahkiakum County, Questions

Questions about radon in Wahkiakum County

Common questions

8 questions, answered from the figures above

Are radon levels high in Wahkiakum County?

In 2020, 0.0% of the radon tests reported to CDC for Wahkiakum County, Washington were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. That is a share of reported tests, not of homes. EPA places Wahkiakum County in Zone 3, lower predicted potential, a predicted average indoor screening level less than 2 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.

Radon levels: what a result meansWhat is radon?Radon levels in Washington

How do I get a radon test in Wahkiakum County?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No radon testing business listed on Radon411 has an address in Wahkiakum County or names it as a service area yet. The Washington radon program is the place to ask about certified testers and any test kit offer it runs.

Radon testing: how to test a homeRadon test kits comparedFree and low-cost kits by stateRadon Action Month checklistWashington radon program

Who does radon mitigation in Wahkiakum County?

Radon411 has no radon business listed for Washington yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Washington requires one.

Radon mitigation: how it worksRadon mitigation costRadon mitigation systemsWashington radon program

What EPA radon zone is Wahkiakum County in?

EPA places Wahkiakum County, Washington in Zone 3, which EPA describes as lower predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.

Should I test my home in Wahkiakum County?

Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.

When is the best time of year to test?

EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.

What does it cost to test?

EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.

Which counties border Wahkiakum County?

Wahkiakum County borders 5 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The reported-test figures on this page describe Wahkiakum County, Washington in 2020. They describe tests other people carried out in other buildings, and none of them measures yours.

Wahkiakum County in figures

The figures above, said in words

What the published data says about Wahkiakum County, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places Wahkiakum County in Zone 3, lower predicted potential, as it does 17 other counties of Washington's 39.

      Of the 5 bordering counties, EPA places Clatsop County, OR and Columbia County, OR in Zone 2 and Cowlitz County, Lewis County and Pacific County in Zone 3.

  • Reported tests

    Measured

    CDC has annual figures for Wahkiakum County for 3 years, 2014 to 2020. In 2020, 0.0% of 1 reported tests were at or above 4 pCi/L.

  • Local record

    Washington's radon program is the Radon Program, run by Washington State Department of Health; its contacts are under Local resources.

    The county's largest incorporated place is Cathlamet; the figures here cover them as part of the county.

Products

Wahkiakum County, Products

Testing and mitigation products

Whatever the figures for Wahkiakum County show, only a test tells you about one home.

Test kits and monitors42

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Best radon monitors for Wahkiakum County homes, compared

Testing

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Mitigation

3

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Wahkiakum County, Bordering counties

Counties bordering Wahkiakum County

Calculated by Radon411
Why bordering counties matter

5 counties share a boundary with Wahkiakum County, computed from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county’s report can be worth reading alongside this one.

Wahkiakum County, Cities and towns

Cities and towns in Wahkiakum County

The radon figures on this page are for Wahkiakum County as a whole. They do not differ by city or town.

  • Cathlamet

One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files.

Wahkiakum County, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.