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Public water system · NJ1424001

Active

Southeast Morris County Mua

At a glance

Southeast Morris County Mua (PWSID NJ1424001) is an active community water system in Morris County, New Jersey. It reports serving 62,349 people through 17,349 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, 2 are health-based, and the most recent began in December 2025.

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

Population served

62,349

Service connections

17,349

Primary source

SW

Surface water

System type

CWS

Community water system

System record

PWSIDNJ1424001
System typeCommunity water system
Activity statusActive
Population served62,349
Service connections17,349
Primary water sourceSurface water
Owner typeLocal government
Primacy agencyNJ state drinking water program
City servedMendham Twp.-1419
StateNew Jersey
ZIP—
CountyMorris County

How does Southeast Morris County Mua compare with other water systems in Morris County?

By EPA's size categories, Southeast Morris County Mua is a large system (10,001 to 100,000 people). Morris County has 302 active public water systems, and Southeast Morris County Mua is the largest of them by population served. Its population served is about 42 times the county average of 1,490 people per system, and accounts for 14% of the 449,898 people reported by systems filed under the county. Across New Jersey, the 3,496 active systems average 2,750 people each. Nationally, the average active community water system reports serving 6,703 people, so Southeast Morris County Mua is about 9.3 times 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 Jersey has 582 active community water systems, 17% of the state's 3,496 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 29 New Jersey systems (0.8%) list surface water as their primary source.

Who owns and regulates Southeast Morris County Mua?

EPA lists Southeast Morris County Mua as owned by a local government. The NJ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 67 of the 302 active systems in Morris County (22%) are also owned by a local government.

Does Southeast Morris County Mua have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2025. The violations listed here began between January 2018 and December 2025. By type: 8 monitoring and reporting, 2 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (2 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.

BeganViolationContaminant or ruleHealth-basedStatus
2025-12-01Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36Surface Water Treatment Rulecode 0200NoArchived
2022-07-01Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71Consumer Confidence Rulecode 7000NoResolved
2019-07-01Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71Consumer Confidence Rulecode 7000NoResolved
2019-01-01Monitoring and reportingWater Quality Parameter M/R · code 53Lead and Copper Rulecode 5000NoResolved
2018-12-30Monitoring and reportingLead Consumer Notice · code 66Lead and Copper Rulecode 5000NoResolved
2018-10-01Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02Total trihalomethanes (TTHM)code 2950YesResolved
2018-07-01Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02Total trihalomethanes (TTHM)code 2950YesResolved
2018-05-01Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31Groundwater Rulecode 0700NoResolved
2018-01-01Monitoring and reportingMonitoring, Regular · code 03Xylenes, Totalcode 2955NoResolved
2018-01-01Monitoring and reportingMonitoring, Regular · code 03cis-1,2-Dichloroethylenecode 2380NoResolved
2018-01-01Monitoring and reportingMonitoring, Regular · code 03Dichloromethanecode 2964NoResolved
2018-01-01Monitoring and reportingMonitoring, Regular · code 031,1,1-Trichloroethanecode 2981NoResolved

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.

Southeast Morris County Mua: frequently asked questions

Who runs Southeast Morris County Mua?

Southeast Morris County Mua (PWSID NJ1424001) is a community water system owned by a local government. It is regulated by the NJ state drinking water program.

How many people does Southeast Morris County Mua serve?

Southeast Morris County Mua reports serving 62,349 people through 17,349 service connections in Morris County, New Jersey.

Where does Southeast Morris County Mua 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 Southeast Morris County Mua have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 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 Southeast Morris County Mua'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, 2 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 NJ state drinking water program.

Where can I find Southeast Morris County Mua's water quality report?

As a community water system, Southeast Morris County Mua 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 Morris County

Water systemCountyPopulation servedTypeSource
Parsippany-Troy Hills Water DepartmentMorris50,400CommunityPurchased surface water
Dover Water CommissionMorris27,806CommunityGroundwater
Montville Twp MuaMorris22,000CommunityPurchased surface water
Denville Twp Water DeptMorris15,881CommunityGroundwater
Madison Water DeptMorris15,820CommunityGroundwater
Randolph Twp Public Works DeptMorris14,820CommunityPurchased 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, “Southeast Morris County Mua, PWSID NJ1424001, New Jersey”, https://aquacensus.com/water-systems/new-jersey/southeast-morris-county-mua-nj1424001 (data as of October 1, 2026).