B
73

Good Water Quality

Hernandez, NM 87537

Rio Arriba County · Population served: 1,514 · Data updated March 2026

Water Systems Serving This Area

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AGUA SANA WUA
Groundwater · Pop. 1,514
PWSID: NM3502421

Violation History (Last 5 Years)

18Total (5yr)
0Health-Based
9Major

Water Quality Summary

Understanding Your Water in Hernandez

Tap water quality in Hernandez, New Mexico (87537) receives an overall grade of B (Good) with a score of 73 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the New Mexico state average of 68. The area is served by Agua Sana Wua, a groundwater system providing water to approximately 1,514 people. The area has 18 violations over the past 5 years, though none were classified as health-based.

Your Score 73/100 B
vs State 5 pts above New Mexico avg (68)
vs National 2 pts below national avg (75)

What a Grade B Means

A score of 73/100 means the water in Hernandez, NM is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.

Groundwater: drawn from underground aquifers via wells

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Hernandez, New Mexico receives a grade of B (Good) with a score of 73/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 87537 is served by 1 water system using groundwater sources, providing water to approximately 1,514 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

No lead data is currently available for ZIP code 87537. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

No PFAS ("forever chemicals") were detected in water systems serving Hernandez, New Mexico during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Hernandez, New Mexico have received 18 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Water in Hernandez, New Mexico shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.

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