Is radon high in Corpus Christi, Texas?

Low. Averaging the model's ZIP-code predictions across Corpus Christi (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.2 pCi/L - about 33% below the US average of 1.8 and about 21% below the Texas average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Corpus Christi ranks 82 of 83 Texas cities on this site.

Which Corpus Christi ZIP codes have the highest radon?

Predictions for the 19 modeled ZIP codes in Corpus Christi range from 1.0 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 Corpus Christi?

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

What does EPA Radon Zone 3 mean for Corpus Christi?

Corpus Christi sits mainly in Nueces 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 Corpus Christi, Texas

LowEPA Zone 3

Predicted long-term basement average of 1.2 pCi/L (model estimate) across the 19 modeled ZIP codes in Corpus Christi - about 33% below the US average of 1.8, about 21% below the Texas average of 1.5. Ranked #82 of 83 Texas cities on this site. Most of the city lies in Nueces County (its ZIPs also reach into 1 other county).

Test Corpus Christi, TX once anyway - radon varies house to house

The predicted basement average here is 1.2 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.

1.2 ± 0.07

pCi/L predicted basement mean (model SD)

0.6 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.0-1.4

range of ZIP-level basement predictions in the city

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

What this means for Corpus Christi

The typical Corpus Christi home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 1.0 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 city's land in each ZIP (Census 2020 ZCTA-to-place relationship file). The 1993 EPA zone (3) for Nueces and the 2001-2021 model agree here.

Comparable Texas cities: McAllen (1.2), Houston (1.2), Pharr (1.2), Harlingen (1.3).

ZIP codes in Corpus Christi

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
78418	19%	1.2 ± 0.07	0.7	Low
78410	12%	1.2 ± 0.07	0.5	Low
78414	9%	1.3 ± 0.07	0.6	Low
78415	7%	1.2 ± 0.07	0.6	Low
78409	6%	1.3 ± 0.07	0.6	Low
78373	6%	1.3 ± 0.06	0.8	Low
78412	6%	1.1 ± 0.07	0.5	Low
78417	6%	1.3 ± 0.06	0.6	Low
78406	5%	1.3 ± 0.07	0.6	Low
78413	5%	1.2 ± 0.06	0.5	Low
78411	4%	1.1 ± 0.07	0.6	Low
78405	3%	1.1 ± 0.08	0.5	Low
78408	3%	1.1 ± 0.08	0.5	Low
78416	2%	1.1 ± 0.07	0.6	Low
78404	2%	1.1 ± 0.08	0.6	Low
78401	1%	1.0 ± 0.07	0.5	Low
78407	1%	1.1 ± 0.07	0.6	Low
78402	1%	1.2 ± 0.06	0.6	Low
78419	1%	1.1 ± 0.07	0.6	Low

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.

Corpus Christi radon questions

Is radon high in Corpus Christi, Texas?: Low. Averaging the model's ZIP-code predictions across Corpus Christi (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.2 pCi/L - about 33% below the US average of 1.8 and about 21% below the Texas average of 1.5. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Corpus Christi ranks 82 of 83 Texas cities on this site.
Which Corpus Christi ZIP codes have the highest radon?: Predictions for the 19 modeled ZIP codes in Corpus Christi range from 1.0 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 Corpus Christi?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Corpus Christi's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 3 mean for Corpus Christi?: Corpus Christi sits mainly in Nueces 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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