D23/100
MESILLA WATER SYSTEM — Water Quality Report 2026
Serving 2,167 people · New Mexico
Water Source
Groundwater
County
—
System ID
NM3560007
Violations
46
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
2
Unresolved
2
Health-Related
TIER 2Resolved
Violation related to Consumer Confidence Report
When: November 20, 2024 – February 25, 2025Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Treatment technique violation
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: December 19, 2021 – July 25, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About MESILLA WATER SYSTEM
Is MESILLA WATER SYSTEM water safe to drink?
MESILLA WATER SYSTEM water receives a grade of D (23/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 46 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MESILLA WATER SYSTEM detected?
1 contaminants were tested in MESILLA WATER SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MESILLA WATER SYSTEM have any EPA violations?
Yes, MESILLA WATER SYSTEM has 46 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, RPT, Other. 7 are health-based violations.
How many people does MESILLA WATER SYSTEM serve?
MESILLA WATER SYSTEM serves approximately 2,167 people, New Mexico. The system provides water to 1 community: Mesilla.
What type of water does MESILLA WATER SYSTEM provide?
MESILLA WATER SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NM3560007.
How does MESILLA WATER SYSTEM compare to other utilities in New Mexico?
MESILLA WATER SYSTEM scores 23/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our New Mexico state page for a full comparison of water systems.