Public water system · NM3555407
ActiveWinterhaven Mdwc and Swa
At a glance
Winterhaven Mdwc and Swa (PWSID NM3555407) is an active community water system in Dona Ana County, New Mexico. It reports serving 147 people through 56 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
147
Service connections
56
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Winterhaven Mdwc and Swa compare with other water systems in Dona Ana County?
By EPA's size categories, Winterhaven Mdwc and Swa is a very small system (500 people or fewer). Dona Ana County has 68 active public water systems. Its population served is well below the county average of 3,744 people per system, and accounts for less than 0.1% of the 254,574 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 Winterhaven Mdwc and Swa 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 Winterhaven Mdwc and Swa?
EPA lists Winterhaven Mdwc and Swa as owned by a local government. 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. 23 of the 68 active systems in Dona Ana County (34%) are also owned by a local government.
Does Winterhaven Mdwc and Swa have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2015. The violations listed here began between January 2011 and July 2015. By type: 12 monitoring and reporting. The contaminants or rules involved are Total trihalomethanes (TTHM), Xylenes, Total, Lead and Copper Rule and Toluene. 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 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2012-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | 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.
Winterhaven Mdwc and Swa: frequently asked questions
Who runs Winterhaven Mdwc and Swa?
Winterhaven Mdwc and Swa (PWSID NM3555407) is a community water system owned by a local government. It is regulated by the NM state drinking water program.
How many people does Winterhaven Mdwc and Swa serve?
Winterhaven Mdwc and Swa reports serving 147 people through 56 service connections in Dona Ana County, New Mexico.
Where does Winterhaven Mdwc and Swa 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 Winterhaven Mdwc and Swa have any drinking water violations?
Of the 12 most recent violations in EPA's records, none 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 Winterhaven Mdwc and Swa'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, none 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 Winterhaven Mdwc and Swa's water quality report?
As a community water system, Winterhaven Mdwc and Swa 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 Dona Ana County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Las Cruces Municipal Water System | Dona Ana | 98,175 | Community | Groundwater |
| New Mexico State University | Dona Ana | 24,000 | Community | Groundwater |
| Camino Real Regional Utility Authority | Dona Ana | 19,466 | Community | Groundwater |
| Dona Ana Mdwca | Dona Ana | 16,987 | Community | Groundwater |
| Lake Section Water Company | Dona Ana | 14,619 | Community | Groundwater |
| Moongate West | Dona Ana | 13,362 | 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, “Winterhaven Mdwc and Swa, PWSID NM3555407, New Mexico”, https://aquacensus.com/water-systems/new-mexico/winterhaven-mdwc-and-swa-nm3555407 (data as of October 1, 2026).