St. Clair County, Missouri — public water systems

14 active public water systems serve St. Clair County, reporting 6.3K people served.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

Population served

6.3K

Community systems

Groundwater share

92.9%

Water systems in St. Clair County

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Active public water systems in St. Clair County, Missouri
#	Water system	County	Population served	Type	Source
1	H Roe Bartle Scout Reservation	St. Clair	1,800	Transient non-community	Groundwater
2	Appleton City Pws	St. Clair	1,050	Community	Purchased surface water
3	Osceola Pws	St. Clair	947	Community	Groundwater
4	Lowry City Pws	St. Clair	640	Community	Groundwater
5	Osceola Public School	St. Clair	575	Non-transient non-community	Groundwater
6	Osceola Cheese Company	St. Clair	500	Transient non-community	Groundwater
7	Krebs Mobile Home Living	St. Clair	200	Transient non-community	Groundwater
8	Sugarfoot Barbeque	St. Clair	128	Transient non-community	Groundwater
9	Collins Pws	St. Clair	125	Community	Groundwater
10	Countryside Trading Post	St. Clair	100	Transient non-community	Groundwater
11	Roscoe C 1 Elementary School	St. Clair	90	Non-transient non-community	Groundwater
12	Twin Oaks Harbor	St. Clair	50	Community	Groundwater
13	Usace Truman Berry Bend South	St. Clair	50	Transient non-community	Groundwater
14	Wildflower Inn	St. Clair	32	Transient non-community	Groundwater

Also serving St. Clair County

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

Multi-county water systems that also serve St. Clair County, Missouri
Water system	County	Population served	Type	Source
Harry S Truman Pwsd 2	Henry + 1 more	2,700	Community	Surface water