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Shiawassee County, Michigan — public water systems

At a glance

126 active public water systems are filed under Shiawassee County, Michigan in EPA's SDWIS records, together reporting 42,865 people served. The largest is City of Owosso, which reports serving 16,353 people. 18 are community water systems serving people where they live; the other 108 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

126

Population served

42.9K

Community systems

18

Groundwater share

99.2%

How does Shiawassee County compare with other Michigan counties?

Shiawassee County has the 29th-most active public water systems among the 131 counties listed for active Michigan systems in EPA records; among the 88 with 3 or more systems, the median has 92. Its systems report 42,865 people served in total, the 33rd-largest county figure in the state and 0.5% of the statewide total. The average system here reports serving 340 people, about 60% below the Michigan average of 847. 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 Shiawassee County's drinking water come from?

By primary water source, Shiawassee County's active systems draw on groundwater (124, 98%), purchased groundwater (1, 0.8%) and surface water (1, 0.8%). Overall, 99% rely mainly on groundwater (including purchased groundwater) and 0.8% on surface water, compared with 97% and 3.1% across Michigan. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Owosso, draws primarily on surface water.

What kinds of water systems operate in Shiawassee County?

Shiawassee County's active systems break down as 18 community systems (14%), 21 non-transient non-community systems (17%) and 87 transient non-community systems (69%). 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 (94%), local government (5.6%) and state government (0.8%).

The 50 largest water systems in Shiawassee County

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Active public water systems in Shiawassee County, Michigan
#Water systemCountyPopulation servedTypeSource
1Owosso, City ofShiawassee16,353CommunitySurface water
2Durand, City ofShiawassee3,446CommunityGroundwater
3Perry, City ofShiawassee2,065CommunityGroundwater
4Corunna, City ofShiawassee2,028CommunityPurchased groundwater
5Mdot - Woodbury Rest AreaShiawassee1,200Transient non-communityGroundwater
6Leisure Lake Snack BarShiawassee1,000Transient non-communityGroundwater
7Bancroft, Village ofShiawassee616CommunityGroundwater
8New Lothrop, Village ofShiawassee610CommunityGroundwater
9Byron, Village ofShiawassee581CommunityGroundwater
10Laingsburg Elementary SchoolShiawassee550Non-transient non-communityGroundwater
11Laingsburg Middle SchoolShiawassee550Non-transient non-communityGroundwater
12Woods and Fields Communities EastShiawassee528CommunityGroundwater
13Reed-Raymond Vfw Post #2272Shiawassee500Transient non-communityGroundwater
14St. Mary'S Catholic Church (Hall)Shiawassee500Transient non-communityGroundwater
15St. Mary'S Catholic ChurchShiawassee500Transient non-communityGroundwater
16Countryside VillageShiawassee490CommunityGroundwater
17Leisure Lake Condo Assn.Shiawassee425Transient non-communityGroundwater
18Redeemer Lutheran Church-OwossoShiawassee412Transient non-communityGroundwater
19Morrice ElementaryShiawassee405Non-transient non-communityGroundwater
20Gracepointe Wesleyan ChurchShiawassee400Transient non-communityGroundwater
21Laingsburg High SchoolShiawassee392Non-transient non-communityGroundwater
22Morrice High SchoolShiawassee300Non-transient non-communityGroundwater
23Edgewood GardensShiawassee300Transient non-communityGroundwater
24Sresd College & Career Readiness CenterShiawassee300Non-transient non-communityGroundwater
25Eagles CoveShiawassee300Transient non-communityGroundwater
26Shiawassee Harvest MinistriesShiawassee300Transient non-communityGroundwater
27Morrice MeadowsShiawassee258CommunityGroundwater
28Northwoods CommunityShiawassee238CommunityGroundwater
29First Church of the Nazarene - OwossoShiawassee210Transient non-communityGroundwater
30Sage MarketShiawassee200Transient non-communityGroundwater
31Campgrounds R UsShiawassee200Transient non-communityGroundwater
32Riverwood Crossing PlazaShiawassee200Non-transient non-communityGroundwater
33Big Boy Restaurant Affiliates, LLCShiawassee200Transient non-communityGroundwater
34Riverwood Crossing Mall #1Shiawassee200Non-transient non-communityGroundwater
35Graham Community Church ShaftsburgShiawassee200Transient non-communityGroundwater
36Bj'S Fine FoodsShiawassee200Transient non-communityGroundwater
37Owosso SpeedwayShiawassee200Transient non-communityGroundwater
38Durand Church of the NazareneShiawassee188Transient non-communityGroundwater
39Woods and Fields Communities WestShiawassee185CommunityGroundwater
40Health Park Building 100Shiawassee150Transient non-communityGroundwater
41First Church of God - OwossoShiawassee150Transient non-communityGroundwater
42Health Park Building 300Shiawassee150Non-transient non-communityGroundwater
43Ovid Medical CareShiawassee150Transient non-communityGroundwater
44Los Tres AmigosShiawassee140Transient non-communityGroundwater
45Crest Marine - OldShiawassee125Non-transient non-communityGroundwater
46First Baptist Church of LaingsburgShiawassee120Non-transient non-communityGroundwater
47Orchard Place Manor ApartmentsShiawassee120CommunityGroundwater
48Sresd Student Learning Center WestShiawassee110Non-transient non-communityGroundwater
49Hometown ChildcareShiawassee100Non-transient non-communityGroundwater
50Faith Comm Church - PerryShiawassee100Transient non-communityGroundwater

All other water systems in Shiawassee County (76)

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

Shiawassee County water systems: frequently asked questions

How many public water systems are in Shiawassee County, Michigan?

EPA's SDWIS records file 126 active public water systems under Shiawassee County, Michigan: 18 community systems (14%), 21 non-transient non-community systems (17%) and 87 transient non-community systems (69%).

Who supplies drinking water in Shiawassee County, MI?

The largest community water systems filed under Shiawassee County are City of Owosso (16,353 people served), City of Durand (3,446 people served) and City of Perry (2,065 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 Shiawassee County's drinking water come from groundwater or surface water?

Of the 126 active public water systems in Shiawassee County, 99% draw mainly on groundwater and 0.8% on surface water, counting purchased supplies. The largest system, City of Owosso, uses surface water.

Where can I find a water quality report for Shiawassee 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. 18 community systems are filed under Shiawassee 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 Shiawassee 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 Michigan 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 Shiawassee County, Michigan”, https://aquacensus.com/water-systems/michigan/shiawassee (data as of October 1, 2026).