Is radon high in Montgomery County, Texas?

Low. The model predicts a long-term basement average of 1.4 pCi/L in Montgomery County (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. Ranked 215 of 253 Texas counties.

Should I test for radon in Montgomery County?

Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Montgomery County already range from 1.3 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.

What does EPA Radon Zone 3 mean for Montgomery 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 Montgomery 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 Montgomery County, Texas

LowEPA Zone 3

Predicted long-term basement average of 1.4 pCi/L (model estimate) across 22 ZIP codes - about 21% below the US average of 1.8, close to the Texas average of 1.5. Ranked #215 of 253 Texas counties.

Test Montgomery County, 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.

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)

0.7 ± 0.07

pCi/L predicted upstairs (above-ground) mean

1.3-1.6

range of ZIP-level basement predictions in the county

What this means for Montgomery

The typical Montgomery 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 1.3 to 1.6 pCi/L.

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

Comparable Texas counties: Bowie County (1.4), Chambers County (1.4), Jasper County (1.4), Jim Hogg County (1.4). The state's highest is Hemphill County at 2.5 pCi/L.

ZIP codes in Montgomery County

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

ZIP	Basement	Upstairs	Grade
77386	1.4 ± 0.06	0.7	Low
77382	1.4 ± 0.06	0.8	Low
77381	1.3 ± 0.07	0.7	Low
77301	1.4 ± 0.06	0.8	Low
77354	1.5 ± 0.06	0.7	Low
77365	1.4 ± 0.06	0.7	Low
77356	1.6 ± 0.06	0.7	Low
77355	1.5 ± 0.06	0.8	Low
77380	1.3 ± 0.06	0.7	Low
77304	1.4 ± 0.06	0.7	Low
77357	1.4 ± 0.07	0.7	Low
77385	1.5 ± 0.07	0.6	Low
77302	1.5 ± 0.06	0.8	Low
77303	1.5 ± 0.07	0.8	Low
77316	1.5 ± 0.06	0.8	Low
77378	1.6 ± 0.06	0.8	Low
77318	1.5 ± 0.07	0.7	Low
77372	1.4 ± 0.07	0.7	Low
77306	1.5 ± 0.06	0.8	Low
77384	1.4 ± 0.06	0.7	Low
77362	1.4 ± 0.06	0.8	Low
77873	1.4 ± 0.07	0.7	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.

Montgomery County radon questions

Is radon high in Montgomery County, Texas?: Low. The model predicts a long-term basement average of 1.4 pCi/L in Montgomery County (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. Ranked 215 of 253 Texas counties.
Should I test for radon in Montgomery County?: Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Montgomery County already range from 1.3 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.
What does EPA Radon Zone 3 mean for Montgomery 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 Montgomery 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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