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RADON411

Radon testing in Walnut Creek, California

Radon testers with an address in Walnut Creek, with the licenses on file for each.

Walnut Creek, CA at a glance

  • Businesses listed

    1

    Walnut Creek
    1
    San Jose
    1

    By each business's listed address

  • Listed for testing

    1

    100% of listings

    Testing
    1
    Mitigation
    0

    A business can be listed for both

  • State license on file

    1

    100% of listings

    State license
    1
    NRPP
    0

    As each issuer's own record shows it

  • Share at 4+ pCi/L

    8.8%

    1.5 pts below CA

    Contra Costa
    8.8%
    California
    10.3%

    Contra Costa, 22nd of 33 in CA, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    Contra Costa County, where Walnut Creek is

Professionals in Walnut Creek

California licensing and every city

No business licensed by California is listed here yet.

Located in California, licensed by another state

These businesses have an address in California, and another state's registry lists them. That does not mean California licenses them: check with California's radon program before hiring one for work here.

1 professional located in Walnut Creek, California and listed by another state.

Radon levels in Walnut Creek

Read a result for Walnut Creek

Starts at Contra Costa County's median, 0.9 pCi/L

0.9pCi/L

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

EPA’s reading of 0.9 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Contra Costa County's median reported result, 2008 to 2017.

Interpret this reading

Walnut Creek lies in Contra Costa County, where 8.8% of 285 radon tests reported to CDC (2008 to 2017, laboratory) were at or above 4 pCi/L, 1.5 points below California pooled (10.3%), 22nd of 33 California counties with 30 or more tests.

Radon test figures for the county Walnut Creek lies in
CountyTestsAt or above 4 pCi/LMedianCalifornia, pooledRank in the stateEPA zone
Contra Costa County2858.8%0.9 pCi/L10.3%22 of 33Zone 2

Shares of tests people chose to run and report, by county (2008 to 2017, laboratory); the state's is its counties' counts added up, calculated by Radon411. Only a test measures a home.

Around Contra Costa County, where Walnut Creek lies, the nearest California counties with a CDC figure for 2008 to 2017, laboratory run from 2.8% to 15.8% of tests at or above 4 pCi/L; the closest, Alameda County, is 19 miles away at 6.7%.

The nearest California counties to Contra Costa County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Alameda County19 mi4786.7%0.7 pCi/L
Solano County24 mi3815.8%0.9 pCi/L
San Francisco County30 mi2462.8%0.5 pCi/L
San Joaquin County36 mi7414.9%1.4 pCi/L
San Mateo County41 mi4689.2%0.9 pCi/L
Marin County45 mi956.3%0.8 pCi/L

Cities near Walnut Creek

Every city in California with listed radon professionals

Listings come from state licensing registries.

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