Hamilton County, Ohio — public water systems

26 active public water systems serve Hamilton County, reporting 842K people served.

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

Active systems

Population served

842K

Community systems

Groundwater share

65.4%

Water systems in Hamilton County

Active public water systems in Hamilton County, Ohio
#	Water system	County	Population served	Type	Source
1	Cincinnati Public Water System	Hamilton	750,200	Community	Surface water
2	Norwood City Pws	Hamilton	19,870	Community	Purchased surface water
3	Indian Hill City Pws	Hamilton	15,000	Community	Groundwater
4	Harrison City Pws	Hamilton	11,600	Community	Groundwater
5	Wyoming City Pws	Hamilton	9,700	Community	Groundwater
6	Reading City Pws	Hamilton	9,506	Community	Purchased surface water
7	Cleves Village Pws	Hamilton	6,000	Community	Groundwater
8	Cincinnati Va Medical Center	Hamilton	4,152	Non-transient non-community	Purchased surface water
9	Trihealth Good Samaritan Hospital	Hamilton	4,000	Non-transient non-community	Purchased surface water
10	Lockland Village Pws	Hamilton	3,486	Community	Groundwater
11	Glendale Village Pws	Hamilton	2,500	Community	Groundwater
12	Cincinnati Childrens Hosp Ionization Sys	Hamilton	1,514	Non-transient non-community	Purchased surface water
13	Addyston Village Pws	Hamilton	900	Community	Groundwater
14	Cincinnati Childrens Med Center Col Hill	Hamilton	722	Non-transient non-community	Purchased surface water
15	Four Seasons Marina	Hamilton	615	Transient non-community	Groundwater
16	Uc Health Medical Center Scis	Hamilton	558	Non-transient non-community	Purchased surface water
17	Cincinnati Incorporated	Hamilton	278	Non-transient non-community	Groundwater
18	The Root Beer Stand	Hamilton	270	Transient non-community	Groundwater
19	Twin Rivers Water Corporation	Hamilton	245	Community	Purchased groundwater
20	Uc Health Ridgeway Tower	Hamilton	208	Non-transient non-community	Purchased surface water
21	Indian Hill Winter Club Pws	Hamilton	200	Transient non-community	Groundwater
22	Blue Bell Beach Pws	Hamilton	123	Transient non-community	Groundwater
23	Whitewater Processing, LLC	Hamilton	120	Non-transient non-community	Groundwater
24	Taylor Creek Youth Org. Pws	Hamilton	100	Transient non-community	Groundwater
25	Robins Nest Golf Course Pws	Hamilton	100	Transient non-community	Groundwater
26	Whitewater Senior Center Pws	Hamilton	45	Transient non-community	Groundwater