Public water system · NM3500123
ActiveLa Mesa Water Coop
At a glance
La Mesa Water Coop (PWSID NM3500123) is an active community water system in Sandoval County, New Mexico. It reports serving 650 people through 330 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, one is health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
650
Service connections
330
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does La Mesa Water Coop compare with other water systems in Sandoval County?
By EPA's size categories, La Mesa Water Coop is a small system (501 to 3,300 people). Sandoval County has 62 active public water systems. Its population served is well below the county average of 2,181 people per system, and accounts for 0.5% of the 135,215 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 La Mesa Water Coop 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 La Mesa Water Coop?
EPA lists La Mesa Water Coop 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. 31 of the 62 active systems in Sandoval County (50%) are also privately owned.
Does La Mesa Water Coop have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015. The violations listed here began between January 2010 and July 2015. By type: 10 monitoring and reporting, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminants or rules involved are Consumer Confidence Rule, Haloacetic acids (HAA5), Total trihalomethanes (TTHM) and Arsenic. EPA lists 12 as resolved. 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 |
|---|---|---|---|---|
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | 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.
La Mesa Water Coop: frequently asked questions
Who runs La Mesa Water Coop?
La Mesa Water Coop (PWSID NM3500123) is a community water system privately owned. It is regulated by the NM state drinking water program.
How many people does La Mesa Water Coop serve?
La Mesa Water Coop reports serving 650 people through 330 service connections in Sandoval County, New Mexico.
Where does La Mesa Water Coop 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 La Mesa Water Coop have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015. 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 La Mesa Water Coop'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, one is health-based, and the most recent began in July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.
Where can I find La Mesa Water Coop's water quality report?
As a community water system, La Mesa Water Coop 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 Sandoval County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rio Rancho Water & Ww Services | Sandoval | 107,350 | Community | Purchased surface water |
| Bernalillo Water System | Sandoval | 10,948 | Community | Groundwater |
| Cuba Water System | Sandoval | 1,789 | Community | Groundwater |
| Jemez Springs Dwua | Sandoval | 1,385 | Community | Groundwater |
| Regina Mdwca | Sandoval | 705 | Community | Groundwater |
| Pena Blanca Water & Sanitation District | Sandoval | 700 | Community | Groundwater |
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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, “La Mesa Water Coop, PWSID NM3500123, New Mexico”, https://aquacensus.com/water-systems/new-mexico/la-mesa-water-coop-nm3500123 (data as of October 1, 2026).