Is radon high in Hidalgo County, Texas?

Low. The model predicts a long-term basement average of 1.3 pCi/L in Hidalgo County (about 31% below the US average of 1.8 and about 18% below the Texas average of 1.5). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 249 of 253 Texas counties.

Should I test for radon in Hidalgo County?

Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Hidalgo County already range from 1.2 to 1.3 pCi/L. A short-term kit costs little and settles the question for your house.

What does EPA Radon Zone 3 mean for Hidalgo County?

Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.

How much does radon mitigation cost in Hidalgo County?

A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Texas quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

Radon levels in Hidalgo County, Texas

LowEPA Zone 3

Predicted long-term basement average of 1.3 pCi/L (model estimate) across 22 ZIP codes - about 31% below the US average of 1.8, about 18% below the Texas average of 1.5. Ranked #249 of 253 Texas counties.

Test Hidalgo County, TX 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.

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.

1.3 ± 0.06

pCi/L predicted basement mean (model SD)

0.7 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.2-1.3

range of ZIP-level basement predictions in the county

What this means for Hidalgo

The typical Hidalgo County home is predicted below 2 pCi/L, the lowest band. That is the best case an area can show - but it describes the average house, and the ZIP-level predictions within the county still span 1.2 to 1.3 pCi/L.

The 1993 EPA zone (3) and the 2001-2021 model agree for Hidalgo. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.

Comparable Texas counties: Cameron County (1.2), Kleberg County (1.2), Harris County (1.3), Brooks County (1.3). The state's highest is Hemphill County at 2.5 pCi/L.

ZIP codes in Hidalgo County

Predicted basement and upstairs means by ZIP (model estimate). ZIPs whose land is mostly in this county.

ZIP	Basement	Upstairs	Grade
78572	1.3 ± 0.06	0.8	Low
78577	1.2 ± 0.07	0.6	Low
78596	1.2 ± 0.06	0.7	Low
78542	1.3 ± 0.06	0.7	Low
78501	1.2 ± 0.07	0.7	Low
78574	1.3 ± 0.07	0.7	Low
78504	1.3 ± 0.06	0.7	Low
78541	1.3 ± 0.06	0.7	Low
78537	1.2 ± 0.06	0.6	Low
78589	1.3 ± 0.06	0.6	Low
78573	1.3 ± 0.06	0.7	Low
78516	1.2 ± 0.07	0.6	Low
78570	1.3 ± 0.06	0.6	Low
78539	1.3 ± 0.06	0.6	Low
78503	1.2 ± 0.07	0.7	Low
78557	1.2 ± 0.07	0.7	Low
78538	1.3 ± 0.06	0.7	Low
78576	1.2 ± 0.06	0.7	Low
78595	1.2 ± 0.07	0.8	Low
78560	1.3 ± 0.07	0.8	Low
78549	1.2 ± 0.07	0.8	Low
78563	1.3 ± 0.06	0.8	Low

If your test comes back at 4 pCi/L or higher

Mitigation is a routine job: a fan-driven pipe that vents soil gas from under the slab to above the roofline, typically $800-$2,500 installed (typical range; local quotes vary). Use certified professionals: EPA find-a-professional. Read the full mitigation guide.

Hidalgo County radon questions

Is radon high in Hidalgo County, Texas?: Low. The model predicts a long-term basement average of 1.3 pCi/L in Hidalgo County (about 31% below the US average of 1.8 and about 18% below the Texas average of 1.5). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 249 of 253 Texas counties.
Should I test for radon in Hidalgo County?: Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Hidalgo County already range from 1.2 to 1.3 pCi/L. A short-term kit costs little and settles the question for your house.
What does EPA Radon Zone 3 mean for Hidalgo County?: Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.
How much does radon mitigation cost in Hidalgo County?: A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Texas quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

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