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Morris County, New Jersey — public water systems

At a glance

302 active public water systems are filed under Morris County, New Jersey in EPA's SDWIS records, together reporting 449,898 people served. The largest is Southeast Morris County Mua, which reports serving 62,349 people. 61 are community water systems serving people where they live; the other 241 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

302

Population served

449.9K

Community systems

61

Groundwater share

96%

How does Morris County compare with other New Jersey counties?

Morris County has the 2nd-most active public water systems among the 62 counties listed for active New Jersey systems in EPA records; among the 27 with 3 or more systems, the median has 101. Its systems report 449,898 people served in total, the 11th-largest county figure in the state and 4.7% of the statewide total. The average system here reports serving 1,490 people, about half of the New Jersey average of 2,750. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Morris County's drinking water come from?

By primary water source, Morris County's active systems draw on groundwater (284, 94%), purchased surface water (10, 3.3%), purchased groundwater (6, 2%) and surface water (2, 0.7%). Overall, 96% rely mainly on groundwater (including purchased groundwater) and 4% on surface water, compared with 96% and 4.5% across New Jersey. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Southeast Morris County Mua, draws primarily on surface water.

What kinds of water systems operate in Morris County?

Morris County's active systems break down as 61 community systems (20%), 59 non-transient non-community systems (20%) and 182 transient non-community systems (60%). 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. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (75%), local government (22%), state government (1.3%) and federal government (1%).

The 50 largest water systems in Morris County

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Active public water systems in Morris County, New Jersey
#Water systemCountyPopulation servedTypeSource
1Southeast Morris County MuaMorris62,349CommunitySurface water
2Parsippany-Troy Hills Water DepartmentMorris50,400CommunityPurchased surface water
3Dover Water CommissionMorris27,806CommunityGroundwater
4Montville Twp MuaMorris22,000CommunityPurchased surface water
5Denville Twp Water DeptMorris15,881CommunityGroundwater
6Madison Water DeptMorris15,820CommunityGroundwater
7Randolph Twp Public Works DeptMorris14,820CommunityPurchased groundwater
8Pequannock Twp Water DepartmentMorris14,010CommunityPurchased surface water
9Rockaway Twp Water DeptMorris14,000CommunityGroundwater
10Nj American Water - RoxburyMorris11,793CommunityGroundwater
11East Hanover Twp Water DeptMorris11,393CommunityPurchased surface water
12Lincoln Park Water DeptMorris11,000CommunityPurchased surface water
13Boonton Water DeptMorris9,532CommunitySurface water
14Chatham Water DeptMorris8,962CommunityGroundwater
15Florham Park Water DeptMorris8,846CommunityGroundwater
16Jefferson Twp W U Lk HopMorris8,500CommunityGroundwater
17Mount Olive Twp W D MainMorris7,887CommunityGroundwater
18Rockaway Boro Water DeptMorris7,066CommunityGroundwater
19Nj American Water - ItcMorris6,463CommunityGroundwater
20Wharton Water DeptMorris6,342CommunityGroundwater
21Awo&M - Picatinny ArsenalMorris6,011CommunityGroundwater
22Roxbury Twp W Dept-ShoreMorris5,153CommunityGroundwater
23Mt Olive Villages WaterMorris5,000CommunityGroundwater
24Washington Twp Mua-SchooMorris4,986CommunityGroundwater
25Jefferson Twp W U Milton SysMorris4,500CommunityGroundwater
26Roxbury Twp W Dept-Sky VMorris4,478CommunityGroundwater
27Mine Hill Twp Water DeptMorris4,300CommunityPurchased groundwater
28Mountain Lakes Water DepMorris4,012CommunityGroundwater
29Mt Olive Village Green Water SystemMorris3,600CommunityGroundwater
30Netcong Water DeptMorris3,342CommunityGroundwater
31Fayson Lakes Water Company Inc.Morris3,010CommunityGroundwater
32Riverdale Boro Water DepMorris2,850CommunityPurchased surface water
33Veolia Water New Jersey Arlington HillsMorris1,989CommunityGroundwater
34Mount Arlington Boro Dpw MainMorris1,978CommunityPurchased groundwater
35Kinnelon Water DeptMorris1,938CommunityPurchased surface water
36Mt Olive High SchoolMorris1,750Non-transient non-communityGroundwater
37West Morris Central HighMorris1,615Non-transient non-communityGroundwater
38Pequannock Twp Wd-Cedar CrestMorris1,463CommunityPurchased surface water
39Jefferson Twp High SchoolMorris1,400Non-transient non-communityGroundwater
40Hopatcong State ParkMorris1,200Transient non-communityGroundwater
41Sisters of Charity of St ElizabethMorris1,100CommunityGroundwater
42Morris Chase/Morris Hunt PcwsMorris1,080CommunityGroundwater
43Mount Arlington Dpw Kadel SysMorris1,053CommunityPurchased groundwater
44Windlass Restaurant & MarinaMorris1,020Transient non-communityGroundwater
45Quick-ChekMorris1,006Transient non-communityGroundwater
46Jefferson Twp Middle SchoolMorris900Non-transient non-communityGroundwater
47Nj American Water - West JerseyMorris837CommunityGroundwater
48School House PlazaMorris811Transient non-communityGroundwater
49St Lukes ParishMorris786Non-transient non-communityGroundwater
50Mount Olive Twp W D SandMorris744CommunityGroundwater

All other water systems in Morris County (251)

The remaining active systems filed under Morris County, largest first, with the population each reports serving.

Also serving Morris County

These systems serve several counties, including Morris County. EPA lists another county first for them, so they are not included in the counts above.

Multi-county water systems that also serve Morris County, New Jersey
Water systemCountyPopulation servedTypeSource
Nj American Water - Short HillsWarren + 6 more217,230CommunitySurface water
Butler Water DeptPassaic + 1 more7,630CommunitySurface water
Washington Twp Mua-HagerHunterdon + 1 more3,458CommunityGroundwater

Morris County water systems: frequently asked questions

How many public water systems are in Morris County, New Jersey?

EPA's SDWIS records file 302 active public water systems under Morris County, New Jersey: 61 community systems (20%), 59 non-transient non-community systems (20%) and 182 transient non-community systems (60%). At least 3 more systems are listed under another county but also serve Morris County.

Who supplies drinking water in Morris County, NJ?

The largest community water systems filed under Morris County are Southeast Morris County Mua (62,349 people served), Parsippany-Troy Hills Water Department (50,400 people served) and Dover Water Commission (27,806 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Morris County's drinking water come from groundwater or surface water?

Of the 302 active public water systems in Morris County, 96% draw mainly on groundwater and 4% on surface water, counting purchased supplies. The largest system, Southeast Morris County Mua, uses surface water.

Where can I find a water quality report for Morris County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 61 community systems are filed under Morris County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Morris County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More New Jersey water systems

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, “Public water systems in Morris County, New Jersey”, https://aquacensus.com/water-systems/new-jersey/morris (data as of October 1, 2026).