Is radon high in College Station, Texas?

Low. Averaging the model's ZIP-code predictions across College Station (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 21% below the US average of 1.8 and close to the Texas average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. College Station ranks 52 of 83 Texas cities on this site.

Which College Station ZIP codes have the highest radon?

Predictions for the 2 modeled ZIP codes in College Station range from 1.3 to 1.5 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 College Station?

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

What does EPA Radon Zone 3 mean for College Station?

College Station sits mainly in Brazos County, which the EPA classifies as Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and covers whole counties. The 2001-2021 model agrees with the zone for the city. Neither replaces a test of your own home.

Radon levels in College Station, Texas

LowEPA Zone 3

Predicted long-term basement average of 1.4 pCi/L (model estimate) across the 2 modeled ZIP codes in College Station - about 21% below the US average of 1.8, close to the Texas average of 1.5. Ranked #52 of 83 Texas cities on this site. Most of the city lies in Brazos County.

Test College Station, TX 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.

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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 ± 0.07

pCi/L predicted basement mean (model SD)

0.8 ± 0.08

pCi/L predicted upstairs (above-ground) mean

1.3-1.5

range of ZIP-level basement predictions in the city

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

What this means for College Station

The typical College Station 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 1.5 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). The 1993 EPA zone (3) for Brazos and the 2001-2021 model agree here.

Comparable Texas cities: Tyler (1.4), San Antonio (1.4), Mesquite (1.4), Conroe (1.4).

ZIP codes in College Station

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
77845	80%	1.5 ± 0.07	0.8	Low
77840	19%	1.3 ± 0.07	0.8	Low
77843	1%	—	—	no model

Testing help in Texas

We link only state program pages we could verify, and Texas's did not respond when we checked, so start from the 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.

College Station radon questions

Is radon high in College Station, Texas?: Low. Averaging the model's ZIP-code predictions across College Station (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 21% below the US average of 1.8 and close to the Texas average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. College Station ranks 52 of 83 Texas cities on this site.
Which College Station ZIP codes have the highest radon?: Predictions for the 2 modeled ZIP codes in College Station range from 1.3 to 1.5 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 College Station?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; College Station's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 3 mean for College Station?: College Station sits mainly in Brazos County, which the EPA classifies as Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and covers whole counties. The 2001-2021 model agrees with the zone for the city. Neither replaces a test of your own home.

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