Public water system · NM3573725
ActiveBig Mesa Water Mdwca
At a glance
Big Mesa Water Mdwca (PWSID NM3573725) is an active community water system in San Miguel County, New Mexico. It reports serving 250 people through 572 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
250
Service connections
572
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Big Mesa Water Mdwca compare with other water systems in San Miguel County?
By EPA's size categories, Big Mesa Water Mdwca is a very small system (500 people or fewer). San Miguel County has 42 active public water systems. Its population served is about 56% below the county average of 564 people per system, and accounts for 1.1% of the 23,678 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 Big Mesa Water Mdwca 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 37 New Mexico systems (3.2%) list surface water as their primary source.
Who owns and regulates Big Mesa Water Mdwca?
EPA lists Big Mesa Water Mdwca 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. 26 of the 42 active systems in San Miguel County (62%) are also owned by a local government.
Does Big Mesa Water Mdwca have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2024. The violations listed here began between May 2017 and January 2024. By type: 8 monitoring and reporting, 3 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Public Notice (3 of them). EPA lists 11 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2023-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2018-04-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2017-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2017-10-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2017-07-16 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2017-07-16 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2017-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
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.
Big Mesa Water Mdwca: frequently asked questions
Who runs Big Mesa Water Mdwca?
Big Mesa Water Mdwca (PWSID NM3573725) is a community water system owned by a local government. It is regulated by the NM state drinking water program.
How many people does Big Mesa Water Mdwca serve?
Big Mesa Water Mdwca reports serving 250 people through 572 service connections in San Miguel County, New Mexico.
Where does Big Mesa Water Mdwca get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Big Mesa Water Mdwca 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 January 2024. 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 Big Mesa Water Mdwca'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 January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.
Where can I find Big Mesa Water Mdwca's water quality report?
As a community water system, Big Mesa Water Mdwca 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 Miguel County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Las Vegas (City of) | San Miguel | 14,530 | Community | Surface water |
| Pecos Water System | San Miguel | 2,133 | Community | Groundwater |
| Pendaries Mdwca | San Miguel | 500 | Community | Groundwater |
| Conchas Dam State Park Northside | San Miguel | 450 | Transient non-community | Surface water |
| East Pecos Mdwca | San Miguel | 413 | Community | Groundwater |
| Pendaries Rv Resort | San Miguel | 405 | Non-transient non-community | Purchased 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, “Big Mesa Water Mdwca, PWSID NM3573725, New Mexico”, https://aquacensus.com/water-systems/new-mexico/big-mesa-water-mdwca-nm3573725 (data as of October 1, 2026).