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Community Water System · PWS NM3500521

Canjilon Water System

Canjilon, New Mexico 87515 - drinking water served from groundwater sources to 469 people, tracked in EPA SDWIS and UCMR5.

469
People served
139
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 139 drinking-water violations at Canjilon Water System, 4% of them health-based - below the New Mexico per-system average.

139
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
469
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Canjilon Water System

Canjilon Water System is a local-owned community water system that delivers drinking water to 469 residents in Canjilon, New Mexico (Rio Arriba County) through 175 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 139 total violations for this system , of which 5 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 69 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 42 violations (MR). 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%).

Canjilon Water System's 139 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
469
Total Violations
139
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
175
County
Rio Arriba
School/Daycare
No
MCL Violations
5
Monitoring Violations
69
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 42 1993
Coliform (TCR) Other 25 1993
TTHM MR 11 2021
Total Haloacetic Acids (HAA5) MR 11 2021
Consumer Confidence Rule Other 10 2012
Lead and Copper Rule MR 5 2011
Coliform (TCR) MCL 5 1994
Public Notice Other 1 2008

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 Canjilon Water System.

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 NM3500521 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
2021 TTHM MR 11 SDWIS / NM3500521 / 2950
2021 Total Haloacetic Acids (HAA5) MR 11 SDWIS / NM3500521 / 2456
2012 Consumer Confidence Rule Other 10 SDWIS / NM3500521 / 7000
2011 Lead and Copper Rule MR 5 SDWIS / NM3500521 / 5000
2008 Public Notice Other 1 SDWIS / NM3500521 / 7500
1994 Coliform (TCR) MCL 5 SDWIS / NM3500521 / 3100
1993 Coliform (TCR) MR 42 SDWIS / NM3500521 / 3100
1993 Coliform (TCR) Other 25 SDWIS / NM3500521 / 3100

How Canjilon Water System Compares

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

Metric Canjilon Water System New Mexico avg Federal benchmark
Total violations 139 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 469 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 Canjilon Water System water safe to drink? ▼
Canjilon Water System (PWS ID: NM3500521) has 139 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 469 people using Groundwater sources.
How many people does Canjilon Water System serve? ▼
Canjilon Water System serves 469 people in Canjilon, New Mexico. It is a Local-owned system using Groundwater water sources with 175 service connections.
What type of violations does Canjilon Water System have? ▼
Canjilon Water System has 139 total violations: 5 health-based violations (MCL exceedances or treatment failures), 69 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Canjilon Water System water? ▼
No PFAS testing data is available for Canjilon Water System under the EPA's UCMR5 monitoring program.
What water source does Canjilon Water System use? ▼
Canjilon Water System 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.