Is La Union, NM tap water safe?
The short answer
1 of the 3 utilities serving La Union has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and New Mexico’s records: Anthony W&SD.
Anthony W&SD, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 335 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in La Union’s ZIP codes, from EPA’s estimates.
- Open report
Anthony W&SD
New Mexico · serves 8,691 people · under 100 in La Union
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 335 ppb, above EPA’s health benchmark.
7 health-based violations since 2016
- Open report
Lower Rio Grande Pwwa South Valley
New Mexico · serves 11,542 people · under 100 in La Union
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 335 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
La Union Mds & WA
New Mexico · serves 1,177 people · under 100 in La Union
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 125 ppb, above EPA’s health benchmark.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Anthony W&SD’s water, which serves the most people here. Another utility’s report names what handles its own results.
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near La Union
The 2 labs New Mexico certifies closest to La Union, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Aqua Environmental Testing -Las Cruces
Las Cruces, NM · about 32 miles
Certified for bacteria
Diagnostic & Technology Center
Alamogordo, NM · about 73 miles
Certified for bacteria
New Mexico Environment Department: Water fairs in New Mexico communities, where well owners bring in a quart of well water to be tested for arsenic, nitrate, fluoride, iron, sulfate, pH and conductivity, with results mailed in two to four weeks. Dates are on the department's calendar. Water Fairs, New Mexico Environment Department.
All 44 certified labs for New MexicoZIP codes in La Union
Which ZIP codes are in La Union: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: New Mexico Environment Department, Drinking Water Bureau, laboratories certified to analyze drinking water samples; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near La Union
Other towns in Doña Ana County with a page of their own.
What to do next
- Read Anthony W&SD’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water