Arsenic in Carlsbad, NM Drinking Water
Arsenic data for Carlsbad, New Mexico · 39,476 residents · 2 ZIP codes
Arsenic is regulated under the Safe Drinking Water Act because of its potential health effects at elevated concentrations; for residents of Carlsbad, New Mexico, the relevant fact is that it has shown up in recent EPA compliance samples — point-of-use filtration is one option residents research, alongside reviewing the utility's published treatment data.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Arsenic in Carlsbad Tap Water
Arsenic has been detected in Carlsbad, New Mexico drinking water at a maximum level of 7 ppb — below the EPA MCL of 10 ppb.
This analysis covers 39,476 residents across 2 ZIP codes in Carlsbad.
Carlsbad's overall water quality grade is B (72/100).
Is Arsenic in Carlsbad Water Safe?
Arsenic was detected in Carlsbad water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis filter can reduce arsenic levels further.
Arsenic Levels by ZIP Code
Average arsenic level across Carlsbad: 7 ppb
Health Effects of Arsenic
- Increased risk of skin, bladder, lung, and kidney cancer
- Cardiovascular disease and type 2 diabetes
- Skin changes (darkening, thickening, lesions)
- Developmental effects in children exposed in utero
Health risk severity: High. Governed by the Arsenic Rule (2006).
How Arsenic Gets Into Drinking Water
- Natural deposits in rock and soil (especially in western U.S.)
- Runoff from orchards and glass/electronics production
- Historical use of arsenic-based pesticides
- Well water in areas with arsenic-rich geology
What to Do About Arsenic in Carlsbad Water
- Install a reverse osmosis (RO) system certified under NSF 58
- Adsorptive media filters (iron-based) can also reduce arsenic
- Have well water tested if on a private supply
- Boiling water does NOT remove arsenic — it concentrates it
Look for filters certified under NSF 53 / NSF 58 for arsenic removal.