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Community Water System · PWS NM3510801

Chilili Water Users Assn

Chilili, New Mexico 87059 - drinking water served from groundwater sources to 175 people, tracked in EPA SDWIS and UCMR5.

175
People served
950
EPA violations
102
Health-based
Untested
UCMR5 result

The verdict

EPA records 950 drinking-water violations at Chilili Water Users Assn, 11% of them health-based - above the New Mexico per-system average.

950
Total EPA violations on record
11%
Health-based (MCL / treatment failure)
175
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Chilili Water Users Assn

Chilili Water Users Assn is a local-owned community water system that delivers drinking water to 175 residents in Chilili, New Mexico (Bernalillo County) through 70 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 950 total violations for this system , of which 102 (11%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 638 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 Chlorine, recorded in 298 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%).

Chilili Water Users Assn's 950 violations sit above 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
175
Total Violations
950
Health-Based Violations
102
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
70
County
Bernalillo
School/Daycare
No
MCL Violations
80
Monitoring Violations
638
Treatment Tech Violations
22

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 298 2024
Coliform (TCR) MR 227 2013
Revised Total Coliform Rule MON 83 2024
Public Notice Other 69 2025
Coliform (TCR) Other 47 2002
Coliform (TCR) MCL 47 2011
Fluoride MCL 33 2025
Consumer Confidence Rule Other 28 2025
Lead and Copper Rule MR 22 2018
Groundwater Rule TT 20 2024
Asbestos MR 5 2011
Revised Total Coliform Rule Other 4 2016
E. COLI MR 3 2022
LEAD AND COPPER RULE REVISIONS TT 2 2024
Groundwater Rule Other 2 2024
LEAD AND COPPER RULE REVISIONS RPT 2 2024

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 Chilili Water Users Assn.

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 NM3510801 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 Public Notice Other 69 SDWIS / NM3510801 / 7500
2025 Fluoride MCL 33 SDWIS / NM3510801 / 1025
2025 Consumer Confidence Rule Other 28 SDWIS / NM3510801 / 7000
2024 Chlorine MR 298 SDWIS / NM3510801 / 0999
2024 Revised Total Coliform Rule MON 83 SDWIS / NM3510801 / 8000
2024 Groundwater Rule TT 20 SDWIS / NM3510801 / 0700
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / NM3510801 / 5200
2024 Groundwater Rule Other 2 SDWIS / NM3510801 / 0700
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / NM3510801 / 5200
2022 E. COLI MR 3 SDWIS / NM3510801 / 3014
2018 Lead and Copper Rule MR 22 SDWIS / NM3510801 / 5000
2016 Revised Total Coliform Rule Other 4 SDWIS / NM3510801 / 8000
2013 Coliform (TCR) MR 227 SDWIS / NM3510801 / 3100
2011 Coliform (TCR) MCL 47 SDWIS / NM3510801 / 3100
2011 Asbestos MR 5 SDWIS / NM3510801 / 1094

How Chilili Water Users Assn Compares

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

Metric Chilili Water Users Assn New Mexico avg Federal benchmark
Total violations 950 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 102 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 175 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 Chilili Water Users Assn water safe to drink? ▼
Chilili Water Users Assn (PWS ID: NM3510801) has 950 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 175 people using Groundwater sources.
How many people does Chilili Water Users Assn serve? ▼
Chilili Water Users Assn serves 175 people in Chilili, New Mexico. It is a Local-owned system using Groundwater water sources with 70 service connections.
What type of violations does Chilili Water Users Assn have? ▼
Chilili Water Users Assn has 950 total violations: 102 health-based violations (MCL exceedances or treatment failures), 638 monitoring/reporting violations, and 22 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Chilili Water Users Assn water? ▼
No PFAS testing data is available for Chilili Water Users Assn under the EPA's UCMR5 monitoring program.
What water source does Chilili Water Users Assn use? ▼
Chilili Water Users Assn 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.