Home hazard report for 88046 — Mesilla, NM
ZIP 88046 is served by Mesilla Water System: 6 violations since 2016, latest lead result 2.9 ppb, PFAS not tested. Doña Ana County is in EPA radon no zone.
Health-based violations since 2016: Groundwater Rule, Lead and Copper Rule Revisions. All are listed as resolved.
90th-percentile lead in the latest round (Jan 2022). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
EPA has not assigned this area a radon zone. Testing is the only way to know.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
The nearest active Superfund site is 3.9 miles away.
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Where ZIP 88046 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Mesilla Water System
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Groundwater Rule | 5 |
| Lead and Copper Rule Revisions | 1 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Nov 2024.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5).
Radon in Doña Ana County
EPA radon no zone — not mapped. EPA has not assigned this area a radon zone. Testing is the only way to know.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Relatively Moderate, with relatively moderate social vulnerability and very low community resilience.
FEMA National Risk Index (December 2025): expected annual losses from each hazard combined with social vulnerability and community resilience, rated relative to all U.S. census tracts. Hazards not listed are not applicable here. It describes the area, not a single building; flood insurance maps (FEMA FIRMs) decide flood-insurance requirements.
Live conditions: river gauges and flood levels · tornado warnings · wildfire detections · earthquakes — our sister maps, updated from NOAA, USGS and NASA every few minutes.
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Griggs & Walnut Ground Water Plume Las Cruces, New Mexico · EPA ID NM0002271286 | Active (final NPL) | 3.9 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 88046
Who supplies drinking water to ZIP 88046?
Mesilla Water System (EPA ID NM3560007), a groundwater (wells) system serving about 2,167 people.
Is there lead in Mesilla, NM tap water?
The utility’s latest 90th-percentile lead result (Jan 2022) was 2.9 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Mesilla, NM water have PFAS?
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Has the water system in 88046 had violations?
Health-based violations since 2016: Groundwater Rule, Lead and Copper Rule Revisions. All are listed as resolved.
What natural hazards affect ZIP 88046?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Moderate; the highest-rated hazards are drought (relatively high), winter weather (relatively high), hail (relatively moderate).
Are there Superfund sites near 88046?
The nearest active Superfund site is 3.9 miles away. Sites within 10 miles: Griggs & Walnut Ground Water Plume (3.9 mi, Active (final NPL)).
Is radon a problem in Doña Ana County?
Doña Ana County is in EPA radon no zone (not mapped). EPA has not assigned this area a radon zone. Testing is the only way to know.