Nitrate In Drinking Water In New Mexico
What residents of New Mexico need to know about nitrate in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, New Mexico Environment Department (NMED), CDC · Last reviewed: 2025-01-01
Quick Answer
Is nitrate in drinking water a real concern in New Mexico?
Yes — New Mexico's irrigated agricultural valleys and dairy operations in the Pecos Valley region have documented nitrate in groundwater. The state also has documented nitrate in some areas from natural geological sources.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily private well users in agricultural areas; some small public systems in rural New Mexico also draw from groundwater with elevated nitrate.
What is the main reason residents should care?
New Mexico's dairy industry in the Pecos and Mesilla Valleys, irrigated vegetable and pecan farming along the Rio Grande, and feedlot operations generate nitrate loading. The Ogallala Aquifer in eastern New Mexico also shows nitrate in some agricultural areas. Natural nitrate-bearing rock formations contribute background levels in certain regions.
Key Facts
| EPA Nitrate MCL | 10 mg/L as N |
| Pecos Valley dairy | Chaves and Eddy Counties dairy operations — significant manure-derived nitrate loading |
| Rio Grande farming | Irrigated vegetable and pecan farming in Doña Ana and Sierra Counties |
| Natural sources | Caliche and nitrate-bearing geological formations contribute background nitrate in some NM regions |
| State oversight | New Mexico Environment Department (NMED) |
Why This Matters in New Mexico
New Mexico has significant dairy operations concentrated in the Pecos Valley (Chaves and Eddy Counties) and irrigated farming along the Rio Grande (Doña Ana and Sierra Counties). Dairy manure and agricultural fertilizer can elevate nitrate in groundwater used by private wells and some small community water systems. Eastern New Mexico draws from the Ogallala Aquifer, which shows nitrate contamination from agricultural use in some areas. New Mexico also has areas where natural nitrate from geologic sources (caliche and nitrate-bearing sediments) contributes background levels independent of agriculture. NMED monitors public water systems for nitrate compliance and provides private well testing guidance.
Critical — Infants Under 6 Months
Do not use tap water that exceeds 10 mg/L nitrate-nitrogen to prepare infant formula or feed infants under six months. Boiling will concentrate nitrate — do not boil. Use bottled water or a certified reverse osmosis system (NSF/ANSI 58) until the issue is resolved.
New Mexico Utilities With Nitrate Violation Records
The utilities listed below have at least one nitrate violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
Albuquerque Water System
Albuquerque · 560,326 served
Rio Rancho Water & Ww Services
Rio Rancho · 107,350 served
Farmington Water System
Farmington · 47,655 served
Epcor Water New Mexico Inc Clovis
Clovis · 41,066 served
Alamogordo Domestic Water System
Alamogordo · 35,301 served
University of New Mexico
Albuquerque · 35,000 served
Carlsbad Municipal Water System
Carlsbad · 33,626 served
Los Alamos Municipal Water System
Los Alamos · 25,000 served
New Mexico State University
Las Cruces · 24,000 served
Kirtland Air Force Base
Albuquerque · 22,500 served
How Nitrate Gets Into Drinking Water
Agricultural fertilizer and manure runoff
Nitrogen-based fertilizers and animal waste applied to New Mexico cropland can leach into groundwater or run off into surface water supplies. This is the dominant nitrate pathway in most agricultural regions.
Septic system effluent
Failing or poorly sited septic systems release nitrogen-rich wastewater near drinking water wells. Rural areas with high well density and aging septic infrastructure face elevated risk.
Concentrated animal feeding operations (CAFOs)
Large livestock facilities generate significant waste. Lagoon leaks and overapplication of manure to nearby fields can create localized nitrate hotspots in groundwater.
Natural geological deposits
In some regions, naturally occurring nitrogen compounds in soil and bedrock contribute background nitrate levels to groundwater independent of agricultural activity.
Who Should Pay Closest Attention
Private well users in New Mexico's Pecos Valley dairy counties (Chaves, Eddy) and irrigated farming areas along the Rio Grande should test for nitrate annually. Households in eastern New Mexico drawing from the Ogallala should also test.
Households with infants under six months
Pregnant residents
Private well owners in agricultural areas
Households near livestock operations or CAFOs
Rural residents on shallow groundwater wells
Households with older or failing septic systems nearby
How to Check Your Situation in New Mexico
- 1
Identify your water utility. Use the ZIP lookup below or browse the New Mexico utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open nitrate violations.
- 3
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website. It must disclose any MCL exceedances.
- 4
If you are on a private well, arrange testing at a New Mexico Environment Department (NMED)-certified lab. Your state health department maintains a list of certified labs. Annual testing is recommended in agricultural areas.
- 5
If you have an infant under six months, use bottled water or a certified RO system (NSF/ANSI 58) immediately as a precautionary measure — do not wait for test results if you are in a high-risk area.
- 6
If your utility issues a nitrate exceedance notice, follow their guidance and do not use tap water for infants until the issue is resolved.
Treatment Options
Carbon filters and boiling do not remove nitrate. Only the options below are effective.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to NSF/ANSI 58 reduce nitrate by 85–95% at the point of use. Under-sink installation required. The most practical residential option for nitrate concerns.
Distillation
Distillation units effectively remove nitrate along with most other dissolved contaminants. Suitable for drinking and cooking water — not whole-house use.
Anion Exchange
Ion exchange systems designed for nitrate removal exchange nitrate ions for chloride on a resin bed. Effective as a point-of-entry system; requires periodic regeneration and monitoring.
Carbon filters do NOT remove nitrate
Standard pitcher filters, faucet filters, and under-sink carbon units — including those certified NSF/ANSI 42 or 53 — do not remove nitrate. Do not use these for nitrate reduction.
Frequently Asked Questions
Related Pages
Nitrate — National Overview
All U.S. utilities with nitrate records
New Mexico State Overview
All utilities and water quality data
Lead in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 85–95% of nitrate
Well Water Guide
Private well testing and safety
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
Find Your Utility
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New Mexico Environment Department (NMED) ↗