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Community Water System · PWS NM3500324

Rosa Joint Ventures Water System

Ignacio, New Mexico 81137 - drinking water served from groundwater sources to 239 people, tracked in EPA SDWIS and UCMR5.

239
People served
326
EPA violations
189
Health-based
Untested
UCMR5 result

The verdict

EPA records 326 drinking-water violations at Rosa Joint Ventures Water System, 58% of them health-based - above the New Mexico per-system average.

326
Total EPA violations on record
58%
Health-based (MCL / treatment failure)
239
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rosa Joint Ventures Water System

Rosa Joint Ventures Water System is a private-owned community water system that delivers drinking water to 239 residents in Ignacio, New Mexico (San Juan County) through 82 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 326 total violations for this system , of which 189 (58%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 95 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Groundwater Rule, recorded in 101 violations (TT, health-based). 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%).

Rosa Joint Ventures Water System's 326 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
239
Total Violations
326
Health-Based Violations
189
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
82
County
San Juan
School/Daycare
No
MCL Violations
84
Monitoring Violations
95
Treatment Tech Violations
105

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 101 2023
Selenium MCL 68 2021
E. COLI MR 32 2023
Revised Total Coliform Rule MON 29 2021
Consumer Confidence Rule Other 19 2022
Public Notice Other 16 2023
Selenium MR 15 2020
Coliform (TCR) MCL 12 2014
Coliform (TCR) MR 11 2014
Lead and Copper Rule MR 8 2021
Revised Total Coliform Rule MCL 4 2020
Revised Total Coliform Rule TT 4 2020
Revised Total Coliform Rule Other 4 2016

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 Rosa Joint Ventures 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 NM3500324 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
2023 Groundwater Rule TT 101 SDWIS / NM3500324 / 0700
2023 E. COLI MR 32 SDWIS / NM3500324 / 3014
2023 Public Notice Other 16 SDWIS / NM3500324 / 7500
2022 Consumer Confidence Rule Other 19 SDWIS / NM3500324 / 7000
2021 Selenium MCL 68 SDWIS / NM3500324 / 1045
2021 Revised Total Coliform Rule MON 29 SDWIS / NM3500324 / 8000
2021 Lead and Copper Rule MR 8 SDWIS / NM3500324 / 5000
2020 Selenium MR 15 SDWIS / NM3500324 / 1045
2020 Revised Total Coliform Rule MCL 4 SDWIS / NM3500324 / 8000
2020 Revised Total Coliform Rule TT 4 SDWIS / NM3500324 / 8000
2016 Revised Total Coliform Rule Other 4 SDWIS / NM3500324 / 8000
2014 Coliform (TCR) MCL 12 SDWIS / NM3500324 / 3100
2014 Coliform (TCR) MR 11 SDWIS / NM3500324 / 3100

How Rosa Joint Ventures Water System Compares

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

Metric Rosa Joint Ventures Water System New Mexico avg Federal benchmark
Total violations 326 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 189 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 239 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 Rosa Joint Ventures Water System water safe to drink? ▼
Rosa Joint Ventures Water System (PWS ID: NM3500324) has 326 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 239 people using Groundwater sources.
How many people does Rosa Joint Ventures Water System serve? ▼
Rosa Joint Ventures Water System serves 239 people in Ignacio, New Mexico. It is a Private-owned system using Groundwater water sources with 82 service connections.
What type of violations does Rosa Joint Ventures Water System have? ▼
Rosa Joint Ventures Water System has 326 total violations: 189 health-based violations (MCL exceedances or treatment failures), 95 monitoring/reporting violations, and 105 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rosa Joint Ventures Water System water? ▼
No PFAS testing data is available for Rosa Joint Ventures Water System under the EPA's UCMR5 monitoring program.
What water source does Rosa Joint Ventures Water System use? ▼
Rosa Joint Ventures 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.