Is radon high in East Los Angeles, California?

Low. Averaging the model's ZIP-code predictions across East Los Angeles (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 22% below the US average of 1.8 and close to the California average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. East Los Angeles ranks 152 of 207 California cities on this site.

Which East Los Angeles ZIP codes have the highest radon?

Predictions for the 3 modeled ZIP codes in East Los Angeles range from 1.3 to 1.4 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 East Los Angeles?

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

What does EPA Radon Zone 2 mean for East Los Angeles?

East Los Angeles 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 1.4 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 East Los Angeles, California

LowEPA Zone 2

Predicted long-term basement average of 1.4 pCi/L (model estimate) across the 3 modeled ZIP codes in East Los Angeles - about 22% below the US average of 1.8, close to the California average of 1.5. Ranked #152 of 207 California cities on this site. Most of the census-designated place lies in Los Angeles County.

Test East Los Angeles, CA once anyway - radon varies house to house

The predicted basement average here is 1.4 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.

Get a short-term test kit →Or track it with a continuous monitor

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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.

1.4 ± 0.06

pCi/L predicted basement mean (model SD)

0.8 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.3-1.4

range of ZIP-level basement predictions in the city

of East Los Angeles ZIPs predicted ≥ 4 pCi/L (0% ≥ 2)

What this means for East Los Angeles

The typical East Los Angeles 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 1.4 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 census-designated place'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 1.4 pCi/L for East Los Angeles; where they disagree, we grade on the model but show both.

Comparable California cities: Fresno (1.4), Chula Vista (1.4), Downey (1.4), Buena Park (1.4).

ZIP codes in East Los Angeles

ZIPs that overlap the census-designated place, 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
90022	52%	1.4 ± 0.07	0.8	Low
90063	34%	1.4 ± 0.06	0.8	Low
90023	15%	1.3 ± 0.06	0.8	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.

East Los Angeles radon questions

Is radon high in East Los Angeles, California?: Low. Averaging the model's ZIP-code predictions across East Los Angeles (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 22% below the US average of 1.8 and close to the California average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. East Los Angeles ranks 152 of 207 California cities on this site.
Which East Los Angeles ZIP codes have the highest radon?: Predictions for the 3 modeled ZIP codes in East Los Angeles range from 1.3 to 1.4 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 East Los Angeles?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; East Los Angeles's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 2 mean for East Los Angeles?: East Los Angeles 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 1.4 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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