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States → New Mexico

Community Water System · PWS NM3592121

Coronado High School

Gallina, New Mexico 87017 - drinking water served from groundwater sources to 263 people, tracked in EPA SDWIS and UCMR5.

263
People served
143
EPA violations
35
Health-based
Untested
UCMR5 result

The verdict

EPA records 143 drinking-water violations at Coronado High School, 24% of them health-based - below the New Mexico per-system average.

143
Total EPA violations on record
24%
Health-based (MCL / treatment failure)
263
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Coronado High School

Coronado High School is a local-owned community water system that delivers drinking water to 263 residents in Gallina, New Mexico (Rio Arriba County) through 19 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 143 total violations for this system , of which 35 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 38 violations (MON). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across New Mexico, EPA tracks 1,037 public water systems serving 2,027,497 people, with 154,522 cumulative violations and 38,650 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 149 violations. Statewide, 70 of 72 UCMR5-tested systems have reported PFAS detections (97.2%).

Coronado High School's 143 violations sit below the New Mexico average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
263
Total Violations
143
Health-Based Violations
35
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
19
County
Rio Arriba
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
64
Treatment Tech Violations
35

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 38 2023
Groundwater Rule TT 32 2024
Public Notice Other 20 2019
Consumer Confidence Rule Other 14 2025
Total Haloacetic Acids (HAA5) MR 10 2019
TTHM MR 10 2019
Revised Total Coliform Rule Other 4 2016
Lead and Copper Rule MR 3 2007
Groundwater Rule Other 3 2023
LEAD AND COPPER RULE REVISIONS TT 3 2024
LEAD AND COPPER RULE REVISIONS RPT 3 2024
Asbestos MR 3 2020

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Coronado High School.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NM3592121 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New Mexico Drinking Water Authority

New Mexico's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find NM regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Consumer Confidence Rule Other 14 SDWIS / NM3592121 / 7000
2024 Groundwater Rule TT 32 SDWIS / NM3592121 / 0700
2024 LEAD AND COPPER RULE REVISIONS TT 3 SDWIS / NM3592121 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / NM3592121 / 5200
2023 Revised Total Coliform Rule MON 38 SDWIS / NM3592121 / 8000
2023 Groundwater Rule Other 3 SDWIS / NM3592121 / 0700
2020 Asbestos MR 3 SDWIS / NM3592121 / 1094
2019 Public Notice Other 20 SDWIS / NM3592121 / 7500
2019 Total Haloacetic Acids (HAA5) MR 10 SDWIS / NM3592121 / 2456
2019 TTHM MR 10 SDWIS / NM3592121 / 2950
2016 Revised Total Coliform Rule Other 4 SDWIS / NM3592121 / 8000
2007 Lead and Copper Rule MR 3 SDWIS / NM3592121 / 5000

How Coronado High School Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Coronado High School New Mexico avg Federal benchmark
Total violations 143 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 35 37.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 97.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 263 1,955 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,037 regulated public water systems in New Mexico.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Coronado High School water safe to drink? ▼
Coronado High School (PWS ID: NM3592121) has 143 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 263 people using Groundwater sources.
How many people does Coronado High School serve? ▼
Coronado High School serves 263 people in Gallina, New Mexico. It is a Local-owned system using Groundwater water sources with 19 service connections.
What type of violations does Coronado High School have? ▼
Coronado High School has 143 total violations: 35 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 35 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Coronado High School water? ▼
No PFAS testing data is available for Coronado High School under the EPA's UCMR5 monitoring program.
What water source does Coronado High School use? ▼
Coronado High School uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.