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RADON411

Radon mitigation and testing in Portland, Oregon

Testers and mitigation companies with an address in Portland, with the licenses on file for each.

Portland, OR at a glance

  • Businesses listed

    10

    Portland
    10
    Gresham
    1

    By each business's listed address

  • Listed for testing

    9

    90% of listings

    Testing
    9
    Mitigation
    4

    A business can be listed for both

  • Share at 4+ pCi/L

    27.8%

    8.9 pts above OR

    Multnomah
    27.8%
    Oregon
    18.9%

    Multnomah, 3rd of 14 in OR, 2023

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    Multnomah County, where Portland is

Professionals in Portland

Oregon licensing and every city

10 professionals in Portland, Oregon.

On this page: 3 testing and mitigation, 1 mitigation, 6 testing

Testing and mitigation 3

Mitigation 1

Testing 6

Radon levels in Portland

Read a result for Portland

Starts at Multnomah County's median, 2.0 pCi/L

2.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.0 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Multnomah County's median reported result, 2023.

Interpret this readingWhat a fix costs

Portland lies mostly in Multnomah County, where 27.8% of 792 radon tests reported to CDC (2023) were at or above 4 pCi/L, 8.9 points above Oregon pooled (18.9%), 3rd of 14 Oregon counties with 30 or more tests.

Radon test figures for the counties Portland lies in
CountyShare of PortlandTestsAt or above 4 pCi/LMedianOregon, pooledRank in the stateEPA zone
Multnomah County99.5%79227.8%2.0 pCi/L18.9%3 of 14Zone 2
Clackamas County0.4%32115.9%1.6 pCi/L18.9%7 of 14Zone 3
Washington County0.1%39611.4%1.3 pCi/L18.9%10 of 14Zone 2

Shares of tests people chose to run and report, by county (2023); the state's is its counties' counts added up, calculated by Radon411. Only a test measures a home.

Around Multnomah County, one of the counties Portland lies in, the nearest Oregon counties with a CDC figure for 2023 run from 4.9% to 39.0% of tests at or above 4 pCi/L; the closest, Hood River County, is 37 miles away at 39.0%.

The nearest Oregon counties to Multnomah County with 30 or more tests, 2023
CountyDistanceTestsAt or above 4 pCi/LMedian
Hood River County37 mi4139.0%2.2 pCi/L
Marion County45 mi19416.0%1.4 pCi/L
Yamhill County49 mi3321.2%1.6 pCi/L
Polk County66 mi7910.1%1.4 pCi/L
Linn County73 mi414.9%0.8 pCi/L
Benton County88 mi3215.6%0.9 pCi/L

Cities near Portland

Every city in Oregon with listed radon professionals

Listings come from state licensing registries.

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