Radon in Doña Ana County, New Mexico
Last updated
EPA’s 1993 map does not list Doña Ana County separately; this is the zone EPA gave Dona Ana County.
Doña Ana County is one of 26 New Mexico counties (out of 33) that EPA places in Zone 2. 26 ZIP codes reach into the county, 22 of them entirely.
What the zone means for a Doña Ana County home
Zone 2 means EPA predicted a county-wide average between 2 and 4 pCi/L. That is below EPA's action level on average, but plenty of individual Doña Ana County homes will be above 4 pCi/L, and EPA suggests considering a fix between 2 and 4 pCi/L too.
A short-term test kit costs little and takes two to seven days. If your result is 4 pCi/L or higher, EPA recommends a follow-up test and, if it is confirmed, a mitigation system, which typically uses a pipe and fan to pull soil gas from under the foundation and vent it above the roof. Check a result with the level calculator and plan your next step with the follow-up planner.
Finding a radon professional in Doña Ana County
We have not added New Mexico professionals yet. Until we do, use the New Mexico radon program at www.env.nm.gov/rcb/indoor-radon-outreach-program, or the national certification boards: the NRPP pro search and NRSB find a pro. Or ask for free quotes below.
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Get radon quotes from certified pros in Doña Ana County
Tell us what you need and we will try to connect you with up to three state-certified or licensed radon professionals who work in your area. It is free and there is no obligation.
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ZIP codes in Doña Ana County
Open a ZIP to see every county it touches. Where a ZIP crosses a county line, the percentage is the share of its land area inside Doña Ana County.
New Mexico radon program
EPA lists the New Mexico radon program (phone 505-476-8608) as the state contact. State programs can tell you about local test results, discounted kits, disclosure rules for home sales and credentialed professionals. Website: www.env.nm.gov/rcb/indoor-radon-outreach-program.
Back to all New Mexico counties.
Frequently asked questions
What is the EPA radon zone for Doña Ana County, New Mexico?
EPA's Map of Radon Zones puts Doña Ana County in Zone 2 (moderate potential): Predicted average indoor screening level from 2 to 4 pCi/L. EPA did not list Doña Ana County separately, so this is the zone of Dona Ana County.
Do I need to test for radon in Doña Ana County if the zone is low?
Yes. EPA says the zone map should not be used to decide whether a single home needs testing. Homes with high radon are found in every zone, and neighboring homes can test very differently. Testing is cheap and the only way to know your level.
How do I find a certified radon professional in Doña Ana County?
Ask the New Mexico radon program for its list of credentialed professionals, or search the national certification boards, NRPP and NRSB. You can also ask for free quotes with the form on this page.
How many ZIP codes are in Doña Ana County?
26 ZIP codes have at least part of their land area in Doña Ana County, based on the U.S. Census Bureau's 2020 ZIP Code Tabulation Area to county relationship file.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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