Skip to content
AquaCensus

St. Joseph County, Indiana — public water systems

At a glance

221 active public water systems are filed under St. Joseph County, Indiana in EPA's SDWIS records, together reporting 218,558 people served. The largest is South Bend Water Works, which reports serving 115,000 people. 16 are community water systems serving people where they live; the other 205 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

221

Population served

218.6K

Community systems

16

Groundwater share

100%

How does St. Joseph County compare with other Indiana counties?

St. Joseph County has the 3rd-most active public water systems among the 109 counties listed for active Indiana systems in EPA records; among the 92 with 3 or more systems, the median has 26. Its systems report 218,558 people served in total, the 5th-largest county figure in the state and 3.8% of the statewide total. The average system here reports serving 989 people, about 32% below the Indiana average of 1,456. 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 St. Joseph County's drinking water come from?

By primary water source, St. Joseph County's active systems draw on groundwater (220, 100%) and purchased groundwater (1, 0.5%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 97% and 2.8% across Indiana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, South Bend Water Works, draws primarily on groundwater.

What kinds of water systems operate in St. Joseph County?

St. Joseph County's active systems break down as 16 community systems (7.2%), 36 non-transient non-community systems (16%) and 169 transient non-community systems (76%). 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 (90%), local government (9.5%) and federal government (0.5%).

The 50 largest water systems in St. Joseph County

🔒 Create a free account to export CSV
Active public water systems in St. Joseph County, Indiana
#Water systemCountyPopulation servedTypeSource
1South Bend Water WorksSt. Joseph115,000CommunityGroundwater
2Mishawaka UtilitiesSt. Joseph49,675CommunityGroundwater
3University of Notre DameSt. Joseph7,400CommunityGroundwater
4Walkerton Light & WaterSt. Joseph2,262CommunityGroundwater
5Sisters of Holy Cross-St. Marys CollegeSt. Joseph2,111CommunityGroundwater
6North Liberty Water WorksSt. Joseph1,896CommunityGroundwater
7New Carlisle Water WorksSt. Joseph1,861CommunityGroundwater
8The Vineyard ChurchSt. Joseph1,473Transient non-communityGroundwater
9Mcdonalds RestaurantSt. Joseph982Transient non-communityGroundwater
10Holy Family ChurchSt. Joseph900Transient non-communityGroundwater
11Seven-Eleven #32578St. Joseph900Transient non-communityGroundwater
12Granger St. (Martins Supermrk & Oscos)St. Joseph880Non-transient non-communityGroundwater
13Discovery Middle SchoolSt. Joseph848Non-transient non-communityGroundwater
14Gkpp Inc..St. Joseph818Transient non-communityGroundwater
15Jsb Petro Inc.St. Joseph755Transient non-communityGroundwater
16Lakeville Water DepartmentSt. Joseph750CommunityGroundwater
17Trinity Evangelical ChurchSt. Joseph712Transient non-communityGroundwater
18Marsh Village Pantry #5637St. Joseph707Transient non-communityGroundwater
19Grissom Middle SchoolSt. Joseph687Non-transient non-communityGroundwater
20Laville Jr. & Sr. High SchoolSt. Joseph675Non-transient non-communityGroundwater
21Horizon Elementary SchoolSt. Joseph671Non-transient non-communityGroundwater
22Mishawaka-Penn-Harris Public LibrarySt. Joseph663Transient non-communityGroundwater
23Aqua Indiana - Wedgewood Park Water UtilSt. Joseph645CommunityPurchased groundwater
24Northpoint Elementary SchoolSt. Joseph612Non-transient non-communityGroundwater
25North Liberty Church of ChristSt. Joseph574Non-transient non-communityGroundwater
26New Life ChurchSt. Joseph555Transient non-communityGroundwater
27Oc Center - SubwaySt. Joseph520Transient non-communityGroundwater
28Prairie Vista Elementary SchoolSt. Joseph510Non-transient non-communityGroundwater
29Elm Road SchoolSt. Joseph488Non-transient non-communityGroundwater
30Meadows Edge Elementary SchoolSt. Joseph426Non-transient non-communityGroundwater
31Christ the King Lutheran ChurchSt. Joseph424Transient non-communityGroundwater
32Elkhart Rv Resort, LLCSt. Joseph410Transient non-communityGroundwater
33Clearwater Village Mobile Home ParkSt. Joseph400CommunityGroundwater
34Mary Frank Elementary SchoolSt. Joseph393Non-transient non-communityGroundwater
35Hamilton GroveSt. Joseph384CommunityGroundwater
36Kingdom Hall of the Jehovahs WitnessesSt. Joseph375Transient non-communityGroundwater
37Walgreens Drugstore #6965St. Joseph370Transient non-communityGroundwater
38Great Lakes Auto AuctionSt. Joseph365Transient non-communityGroundwater
39St. Patrick ParkSt. Joseph360Transient non-communityGroundwater
40TreviSt. Joseph356Transient non-communityGroundwater
41Community Gospel ChurchSt. Joseph353Transient non-communityGroundwater
42Knollwood Country ClubSt. Joseph340Non-transient non-communityGroundwater
43Holy Family SchoolSt. Joseph320Non-transient non-communityGroundwater
44Bell-Mart Amoco - GrangerSt. Joseph306Transient non-communityGroundwater
45Granger Christian SchoolSt. Joseph280Non-transient non-communityGroundwater
46South Bend Country ClubSt. Joseph275Transient non-communityGroundwater
47Michiana PlazaSt. Joseph270Transient non-communityGroundwater
48Dairy Queen - GrangerSt. Joseph265Transient non-communityGroundwater
49Kryder-Harr Veterinary ClinicSt. Joseph264Transient non-communityGroundwater
50Ireland Road Church of GodSt. Joseph263Transient non-communityGroundwater

All other water systems in St. Joseph County (171)

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

St. Joseph County water systems: frequently asked questions

How many public water systems are in St. Joseph County, Indiana?

EPA's SDWIS records file 221 active public water systems under St. Joseph County, Indiana: 16 community systems (7.2%), 36 non-transient non-community systems (16%) and 169 transient non-community systems (76%).

Who supplies drinking water in St. Joseph County, IN?

The largest community water systems filed under St. Joseph County are South Bend Water Works (115,000 people served), Mishawaka Utilities (49,675 people served) and University of Notre Dame (7,400 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 St. Joseph County's drinking water come from groundwater or surface water?

Of the 221 active public water systems in St. Joseph County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, South Bend Water Works, uses groundwater.

Where can I find a water quality report for St. Joseph 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. 16 community systems are filed under St. Joseph 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 St. Joseph 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 Indiana 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 St. Joseph County, Indiana”, https://aquacensus.com/water-systems/indiana/st-joseph (data as of October 1, 2026).