Is radon high in ZIP 93905?

Low. The model's predicted long-term basement average for ZIP 93905 is 1.5 pCi/L (SD 0.06), with above-ground floors at 0.9 pCi/L. That is about 30% below the average US ZIP code (2.2) and close to the Monterey County average of 1.6. It ranks 20 of 25 ZIPs in the county.

Do I need to test my home in 93905?

Yes, once. Even in a low-predicted ZIP the EPA recommends every home be tested; a single house's foundation and ventilation can put it several times above its neighbors. One short-term kit answers it.

What EPA radon zone is ZIP 93905 in?

ZIP 93905 lies mostly in Monterey County, which the EPA classifies as Radon Zone 2 (moderate potential (2-4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

Radon levels in ZIP 93905

LowEPA Zone 2

ZIP 93905 (Monterey County, California): predicted long-term basement average of 1.5 pCi/L (model estimate), about 30% below the average US ZIP (2.2) and close to the California average (1.5). This is the most populous ZIP in Monterey County.

Test ZIP 93905 once anyway - radon varies house to house

The predicted basement average here is 1.5 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

We may earn a commission from Amazon at no extra cost to you.

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.

1.5 ± 0.06

pCi/L predicted basement mean (model SD)

0.9 ± 0.08

pCi/L predicted upstairs mean

1.0 ± 0.07

pCi/L predicted typical screening test

How 93905 compares

Within Monterey County, ZIP 93905 ranks #20 of 25 ZIPs by predicted basement level; the county average is 1.6 pCi/L and its ZIPs run from 1.4 to 1.9. The county is EPA Radon Zone 2. About 61,087 people lived in this ZIP at the 2010 Census.

Both basement (1.5) and upstairs (0.9) predictions are under 2 pCi/L. That is reassuring for the area, but the model's own uncertainty (± 0.06) and house-to-house variation mean a test is still the only way to know your home.

Other ZIP codes in Monterey County

939061.5
939551.6
939401.4
939601.7
939011.6
939331.6
939071.5
939271.6
939301.6
939501.4
939081.6
939231.7
950121.6
939261.7
939241.8
939531.4
950041.6
934511.8
939251.7
934261.9
950391.7
939201.5
934501.9
939321.8

ZIP 93905 radon questions

Is radon high in ZIP 93905?: Low. The model's predicted long-term basement average for ZIP 93905 is 1.5 pCi/L (SD 0.06), with above-ground floors at 0.9 pCi/L. That is about 30% below the average US ZIP code (2.2) and close to the Monterey County average of 1.6. It ranks 20 of 25 ZIPs in the county.
Do I need to test my home in 93905?: Yes, once. Even in a low-predicted ZIP the EPA recommends every home be tested; a single house's foundation and ventilation can put it several times above its neighbors. One short-term kit answers it.
What EPA radon zone is ZIP 93905 in?: ZIP 93905 lies mostly in Monterey County, which the EPA classifies as Radon Zone 2 (moderate potential (2-4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

ZIP pages are generated for ZIPs predicted at or above 2.5 pCi/L and for the most populous ZIP in each county; all other ZIPs appear in their county table. Methodology.