D30/100
GREATER CHIMAYO MDWCA — Water Quality Report 2026
Serving 1,050 people · New Mexico
Water Source
Groundwater
County
—
System ID
NM3502426
Violations
27
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.80 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
6
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – July 2, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – August 9, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – October 11, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – December 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – October 31, 2021Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – July 29, 2021Enforcement: 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 GREATER CHIMAYO MDWCA
Is GREATER CHIMAYO MDWCA water safe to drink?
GREATER CHIMAYO MDWCA water receives a grade of D (30/100), which is considered poor. 1 contaminant(s) exceed EPA legal limits and 27 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has GREATER CHIMAYO MDWCA detected?
2 contaminants were tested in GREATER CHIMAYO MDWCA's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does GREATER CHIMAYO MDWCA have any EPA violations?
Yes, GREATER CHIMAYO MDWCA has 27 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MON. 8 are health-based violations.
How many people does GREATER CHIMAYO MDWCA serve?
GREATER CHIMAYO MDWCA serves approximately 1,050 people, New Mexico. The system provides water to 1 community: Chimayo.
What type of water does GREATER CHIMAYO MDWCA provide?
GREATER CHIMAYO MDWCA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NM3502426.
How does GREATER CHIMAYO MDWCA compare to other utilities in New Mexico?
GREATER CHIMAYO MDWCA scores 30/100 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.