Public water system · NM3500324
ActiveRosa Joint Ventures Water System
At a glance
Rosa Joint Ventures Water System (PWSID NM3500324) is an active community water system in San Juan County, New Mexico. It reports serving 239 people through 82 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
239
Service connections
82
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rosa Joint Ventures Water System compare with other water systems in San Juan County?
By EPA's size categories, Rosa Joint Ventures Water System is a very small system (500 people or fewer). San Juan County has 22 active public water systems. Its population served is well below the county average of 4,715 people per system, and accounts for 0.2% of the 103,721 people reported by systems filed under the county. Across New Mexico, the 1,165 active systems average 1,885 people each. Nationally, the average active community water system reports serving 6,703 people, so Rosa Joint Ventures Water System is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. New Mexico has 645 active community water systems, 55% of the state's 1,165 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,009 New Mexico systems (87%) list groundwater as their primary source.
Who owns and regulates Rosa Joint Ventures Water System?
EPA lists Rosa Joint Ventures Water System as privately owned. The NM state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 22 active systems in San Juan County (27%) are also privately owned.
Does Rosa Joint Ventures Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in December 2025. The violations listed here began between August 2023 and December 2025. By type: 10 required treatment not met, 1 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Groundwater Rule (11 of them). EPA lists 9 as unaddressed and 3 as resolved. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-12-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-09-28 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Unaddressed |
| 2023-08-17 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2023-08-09 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2023-08-09 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Rosa Joint Ventures Water System: frequently asked questions
Who runs Rosa Joint Ventures Water System?
Rosa Joint Ventures Water System (PWSID NM3500324) is a community water system privately owned. It is regulated by the NM state drinking water program.
How many people does Rosa Joint Ventures Water System serve?
Rosa Joint Ventures Water System reports serving 239 people through 82 service connections in San Juan County, New Mexico.
Where does Rosa Joint Ventures Water System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Rosa Joint Ventures Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in December 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Rosa Joint Ventures Water System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.
Where can I find Rosa Joint Ventures Water System's water quality report?
As a community water system, Rosa Joint Ventures Water System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in San Juan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Farmington Water System | San Juan | 47,655 | Community | Surface water |
| Aztec Domestic Water System | San Juan | 9,673 | Community | Surface water |
| Bloomfield Water Supply System | San Juan | 9,536 | Community | Surface water |
| Lee Hammond Water | San Juan | 8,817 | Community | Surface water |
| Lower Valley Water Users Association | San Juan | 7,615 | Community | Surface water |
| Morningstar Water System | San Juan | 5,694 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Rosa Joint Ventures Water System, PWSID NM3500324, New Mexico”, https://aquacensus.com/water-systems/new-mexico/rosa-joint-ventures-water-system-nm3500324 (data as of October 1, 2026).