Is radon high in Lynwood, California?

Low. Averaging the model's ZIP-code predictions across Lynwood (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.3 pCi/L - about 30% below the US average of 1.8 and about 16% below the California average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Lynwood ranks 205 of 207 California cities on this site.

Which Lynwood ZIP codes have the highest radon?

Predictions for the 1 modeled ZIP codes in Lynwood range from 1.3 to 1.3 pCi/L in the basement. 0% of them are predicted at or above 4 pCi/L and 0% at or above 2. The city is fairly uniform, so the city-wide number is a reasonable guide for any neighborhood.

Should I test for radon in Lynwood?

Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Lynwood's low predicted average describes the typical home, not yours.

What does EPA Radon Zone 2 mean for Lynwood?

Lynwood sits mainly in Los Angeles County, which the EPA classifies as Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and covers whole counties. The newer model's city average of 1.3 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.

Radon levels in Lynwood, California

LowEPA Zone 2

Predicted long-term basement average of 1.3 pCi/L (model estimate) across the 1 modeled ZIP codes in Lynwood - about 30% below the US average of 1.8, about 16% below the California average of 1.5. Ranked #205 of 207 California cities on this site. Most of the city lies in Los Angeles County.

Test Lynwood, CA once anyway - radon varies house to house

The predicted basement average here is 1.3 pCi/L, below the EPA's 2 pCi/L "consider fixing" threshold. That's good news for the area - but the EPA still recommends every home be tested, because foundation cracks, soil pockets and ventilation make one house very different from its neighbor. One inexpensive kit settles it.

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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

1.3 ± 0.06

pCi/L predicted basement mean (model SD)

0.6 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.3-1.3

range of ZIP-level basement predictions in the city

of Lynwood ZIPs predicted ≥ 4 pCi/L (0% ≥ 2)

What this means for Lynwood

The typical Lynwood home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 1.3 to 1.3 pCi/L.

The city figure is not a separate estimate: it is the mean of the model's ZIP-code predictions, weighted by the share of the city's land in each ZIP (Census 2020 ZCTA-to-place relationship file). Note that the EPA classifies Los Angeles County as Zone 2 while the newer model predicts 1.3 pCi/L for Lynwood; where they disagree, we grade on the model but show both.

Comparable California cities: South Gate (1.3), Bellflower (1.3), Carmichael (1.3), Arden-Arcade (1.2).

ZIP codes in Lynwood

ZIPs that overlap the city, largest share of its land first. Predicted basement and upstairs means are model estimates; ZIPs the model does not cover show a dash.

ZIP	Share of city	Basement	Upstairs	Grade
90262	100%	1.3 ± 0.06	0.6	Low

Testing help in California

California's radon program page is at www.cdph.ca.gov; it lists testing and certified-mitigator guidance. EPA state radon contacts page. If a test comes back at 4 pCi/L or higher, mitigation typically costs $800-$2,500 installed; use EPA find-a-professional and read the mitigation guide.

Lynwood radon questions

Is radon high in Lynwood, California?: Low. Averaging the model's ZIP-code predictions across Lynwood (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.3 pCi/L - about 30% below the US average of 1.8 and about 16% below the California average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Lynwood ranks 205 of 207 California cities on this site.
Which Lynwood ZIP codes have the highest radon?: Predictions for the 1 modeled ZIP codes in Lynwood range from 1.3 to 1.3 pCi/L in the basement. 0% of them are predicted at or above 4 pCi/L and 0% at or above 2. The city is fairly uniform, so the city-wide number is a reasonable guide for any neighborhood.
Should I test for radon in Lynwood?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Lynwood's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 2 mean for Lynwood?: Lynwood sits mainly in Los Angeles County, which the EPA classifies as Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and covers whole counties. The newer model's city average of 1.3 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.

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