Mercer County, Pennsylvania — public water systems

125 active public water systems serve Mercer County, reporting 95.4K people served.

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

Active systems

125

Population served

95.4K

Community systems

Groundwater share

96%

Water systems in Mercer County

Active public water systems in Mercer County, Pennsylvania
#	Water system	County	Population served	Type	Source
1	Aqua Pa Shenango Valley WTP	Mercer	48,000	Community	Surface water
2	Aqua Pa Greenville	Mercer	8,600	Community	Surface water
3	Grove City Boro Water Dept	Mercer	7,871	Community	Groundwater
4	Sharpsville Boro Water Co	Mercer	5,029	Community	Purchased surface water
5	Pine Twp Water Distr System	Mercer	3,082	Community	Purchased groundwater
6	Reynolds Water Company	Mercer	2,370	Community	Surface water
7	Buhl Community Water Company	Mercer	2,227	Community	Groundwater
8	Aqua Pa Lake Latonka WTP	Mercer	1,600	Community	Groundwater
9	Sandy Lake Boro	Mercer	1,100	Community	Groundwater
10	St Paul Homes	Mercer	1,000	Community	Groundwater
11	Plantation Park	Mercer	1,000	Transient non-community	Groundwater
12	Stoneboro Water Works	Mercer	956	Community	Groundwater
13	Shenango River Lake	Mercer	950	Transient non-community	Groundwater
14	Jamestown Boro Water Auth	Mercer	680	Community	Groundwater
15	South Pymatuning	Mercer	641	Community	Purchased surface water
16	Commodore Perry School	Mercer	550	Non-transient non-community	Groundwater
17	Pa Dot Rest Area 17	Mercer	500	Transient non-community	Groundwater
18	Pa Dot Rest Area 18	Mercer	500	Transient non-community	Groundwater
19	Fredonia Boro	Mercer	443	Community	Groundwater
20	Rv Village	Mercer	400	Transient non-community	Groundwater
21	Mercer Grove City Koa	Mercer	300	Transient non-community	Groundwater
22	Custaloga Town Scout Camp	Mercer	300	Transient non-community	Groundwater
23	Burger King #11027	Mercer	300	Transient non-community	Groundwater
24	Grove City Country Club	Mercer	250	Transient non-community	Groundwater
25	Pine Grove Mobile Home Park	Mercer	244	Community	Groundwater
26	Keystone Charter School	Mercer	225	Non-transient non-community	Groundwater
27	Last Minit Mart Jamestown	Mercer	200	Transient non-community	Groundwater
28	Camp Nazareth	Mercer	200	Transient non-community	Groundwater
29	Ilsco Extrusions	Mercer	175	Non-transient non-community	Groundwater
30	Brass Lantern	Mercer	150	Transient non-community	Groundwater
31	Greenville MHP	Mercer	150	Community	Groundwater
32	County Line Cafe	Mercer	150	Transient non-community	Groundwater
33	Liberty Township	Mercer	138	Community	Purchased groundwater
34	Cool Springs Fitness	Mercer	125	Transient non-community	Groundwater
35	Leesburg Water Association	Mercer	125	Community	Groundwater
36	Pine Hill Golf Course	Mercer	110	Transient non-community	Groundwater
37	Delaware Twp Mun Bldg	Mercer	100	Transient non-community	Groundwater
38	Temple Grove Campground	Mercer	100	Transient non-community	Groundwater
39	James Stoner Vfw Post 6233	Mercer	100	Transient non-community	Groundwater
40	Mercer Cnty Livestock Auction	Mercer	100	Transient non-community	Groundwater
41	Clark House	Mercer	100	Transient non-community	Groundwater
42	Keystone Safari	Mercer	100	Non-transient non-community	Groundwater
43	New England Tavern	Mercer	100	Transient non-community	Groundwater
44	Rocky Springs Campground	Mercer	100	Transient non-community	Groundwater
45	Jughandle (the)	Mercer	100	Transient non-community	Groundwater
46	Rudys Restaurant	Mercer	100	Transient non-community	Groundwater
47	Leo Mart	Mercer	100	Transient non-community	Groundwater
48	Wagler Cottages	Mercer	100	Transient non-community	Groundwater
49	Talbots Taproom and Terrace	Mercer	100	Transient non-community	Groundwater
50	Ull Scream	Mercer	100	Transient non-community	Groundwater