Tompkins County, New York — public water systems

111 active public water systems serve Tompkins County, reporting 102.9K people served.

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

Active systems

111

Population served

102.9K

Community systems

Groundwater share

91.9%

Water systems in Tompkins County

Active public water systems in Tompkins County, New York
#	Water system	County	Population served	Type	Source
1	Cornell University	Tompkins	31,581	Community	Surface water
2	Ithaca City	Tompkins	29,457	Community	Surface water
3	Ithaca Town Wd	Tompkins	13,000	Community	Purchased surface water
4	Cayuga Heights Village	Tompkins	3,170	Community	Purchased surface water
5	Lansing (V)	Tompkins	3,100	Community	Purchased surface water
6	Lansing (T) Consolidated Wd	Tompkins	3,000	Community	Purchased surface water
7	Groton Village	Tompkins	2,470	Community	Groundwater under influence of surface water
8	Trumansburg Village	Tompkins	2,300	Community	Groundwater
9	Newfield Wds	Tompkins	2,300	Community	Groundwater
10	Dryden Village	Tompkins	2,000	Community	Groundwater
11	Dryden Wd	Tompkins	725	Community	Purchased surface water
12	Pinecreek Campground	Tompkins	495	Transient non-community	Groundwater
13	Hanshaw Village MHP	Tompkins	447	Community	Groundwater
14	Treman State Park-Upper	Tompkins	400	Transient non-community	Groundwater
15	Ulysses Wd #3	Tompkins	400	Community	Purchased surface water
16	Caroline Elementary School	Tompkins	350	Non-transient non-community	Groundwater
17	Ithaca Estates	Tompkins	342	Community	Groundwater
18	Enfield Elementary School	Tompkins	282	Non-transient non-community	Groundwater
19	West Danby Wd	Tompkins	265	Community	Groundwater
20	Country Acres MHP	Tompkins	253	Community	Groundwater
21	Little Creek MHP	Tompkins	252	Community	Groundwater
22	William George Agency	Tompkins	250	Community	Groundwater
23	Yellow Barn Wd	Tompkins	250	Community	Groundwater
24	Village Taqueria	Tompkins	220	Transient non-community	Groundwater
25	Sandy Creek Mobile Home Park	Tompkins	215	Community	Groundwater
26	Dandy Mini Mart #33-C	Tompkins	200	Transient non-community	Groundwater
27	Buttermilk Falls State Park - Upper	Tompkins	200	Transient non-community	Groundwater
28	Dandy Mini-Mart #47-F	Tompkins	200	Transient non-community	Groundwater
29	Newfield Estates	Tompkins	160	Community	Groundwater
30	Mclean-Cassavant Elementary School	Tompkins	152	Non-transient non-community	Groundwater
31	Spruce Row Campground	Tompkins	150	Transient non-community	Groundwater
32	Elm Tree Inn	Tompkins	129	Transient non-community	Groundwater
33	Pleasant View MHP	Tompkins	125	Community	Groundwater
34	Beaconview MHP	Tompkins	110	Community	Groundwater
35	Stork H & E Turbo Blading	Tompkins	110	Non-transient non-community	Groundwater
36	Country Gardens Apartments	Tompkins	110	Community	Groundwater
37	Creekwood Apartments	Tompkins	110	Community	Groundwater
38	Ithaca Yacht Club	Tompkins	100	Transient non-community	Groundwater
39	Frosty Cow	Tompkins	100	Transient non-community	Groundwater
40	Subway Dryden	Tompkins	100	Transient non-community	Groundwater
41	Willow Glen Christian School	Tompkins	100	Non-transient non-community	Groundwater
42	Groton Golf and Recreation Association	Tompkins	100	Transient non-community	Groundwater
43	Franziska Racker Centers	Tompkins	100	Non-transient non-community	Groundwater
44	Dandy Mini Mart #77-E	Tompkins	100	Transient non-community	Groundwater
45	Khmer Angkor	Tompkins	100	Transient non-community	Groundwater
46	Freeville Elementary School	Tompkins	95	Non-transient non-community	Groundwater
47	Fall Creek Park	Tompkins	90	Community	Groundwater under influence of surface water
48	Seabring Inn	Tompkins	80	Transient non-community	Groundwater
49	Hillview Terrace MHP	Tompkins	80	Community	Groundwater
50	Hillendale Golf Course	Tompkins	75	Transient non-community	Groundwater