Skip to content
TapBuff
ZIP

Is San Ysidro, NM tap water safe?

2 utilities serve San Ysidro, by EPA’s records. Here is what EPA’s and New Mexico’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

2 of the 2 utilities serving San Ysidro have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and New Mexico’s records: Dona Ana Mdwca and Las Cruces Municipal Water System.

Dona Ana Mdwca, which serves the most people here, has 1 result above the legal limit, 1 result above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Uranium at 45 ppb, above the legal limit.

The water from Dona Ana Mdwca is hard, typically 178 mg/L (10.4 grains per gallon). How it compares.

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 San Ysidro’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Dona Ana Mdwca’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

Every claim, and more filters, in the full report

Water testing near San Ysidro

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab New Mexico certifies.

No lab New Mexico certifies is within 75 miles of San Ysidro on the state’s list. Some take samples by mail; the state’s page lists them all.

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 Mexico

ZIP codes in San Ysidro

Which ZIP codes are in San Ysidro: 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.

Near San Ysidro

Other towns in Sandoval County with a page of their own.

What to do next