Public water system · NM3519025

Active

Sena Mdwca

At a glance

Sena Mdwca (PWSID NM3519025) is an active community water system in San Miguel County, New Mexico. It reports serving 180 people through 42 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, one is health-based, and the most recent began in July 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

180

Service connections

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDNM3519025

System typeCommunity water system

Activity statusActive

Population served180

Service connections42

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyNM state drinking water program

City servedSena

StateNew Mexico

ZIP—

CountySan Miguel County

How does Sena Mdwca compare with other water systems in San Miguel County?

By EPA's size categories, Sena Mdwca is a very small system (500 people or fewer). San Miguel County has 42 active public water systems. Its population served is well below the county average of 564 people per system, and accounts for 0.8% 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 Sena 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. 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 Sena Mdwca?

EPA lists Sena 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 Sena 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 July 2023. The violations listed here began between April 2018 and July 2023. By type: 10 public notice, recordkeeping or other, 1 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (5 of them). 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
2023-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2021-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2021-02-20	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2020-12-23	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2020-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2020-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2020-03-22	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2019-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2019-09-22	Required treatment not metFailure To Address Deficiency · code 45	Groundwater Rulecode 0700	Yes	Resolved
2019-06-27	Public notice, recordkeeping or otherFailure to Consult with State · code 20	Groundwater Rulecode 0700	No	Resolved
2018-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2018-04-13	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	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.

Sena Mdwca: frequently asked questions

Who runs Sena Mdwca?

Sena Mdwca (PWSID NM3519025) is a community water system owned by a local government. It is regulated by the NM state drinking water program.

How many people does Sena Mdwca serve?

Sena Mdwca reports serving 180 people through 42 service connections in San Miguel County, New Mexico.

Where does Sena Mdwca 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 Sena 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 July 2023. 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 Sena 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 July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.

Where can I find Sena Mdwca's water quality report?

As a community water system, Sena 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, “Sena Mdwca, PWSID NM3519025, New Mexico”, https://aquacensus.com/water-systems/new-mexico/sena-mdwca-nm3519025 (data as of October 1, 2026).