Putnam County, New York — public water systems

384 active public water systems serve Putnam County, reporting 57.7K people served.

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

Active systems

384

Population served

57.7K

Community systems

101

Groundwater share

98.7%

Water systems in Putnam County

Active public water systems in Putnam County, New York
#	Water system	County	Population served	Type	Source
1	Carmel Wd 2	Putnam	5,000	Community	Surface water
2	Mahopac School Complex (Falls, Mms, Mhs)	Putnam	3,200	Non-transient non-community	Groundwater
3	Cold Spring Village	Putnam	2,666	Community	Surface water
4	Brewster Village	Putnam	2,162	Community	Groundwater
5	Continental Village Wd	Putnam	1,509	Community	Purchased surface water
6	Mount Ebo Ws	Putnam	1,500	Community	Groundwater
7	Brewster Heights	Putnam	1,350	Community	Surface water
8	Carmel Wd 3	Putnam	1,350	Community	Groundwater
9	Watchtower Bible Tract Society	Putnam	1,251	Community	Groundwater
10	Mahopac Water Co	Putnam	1,202	Community	Groundwater
11	Carmel Wd 8	Putnam	1,000	Community	Surface water
12	Chuang Yen Monastery Great Buddha Hall	Putnam	1,000	Transient non-community	Groundwater
13	Hill Sparrow Master Hoa	Putnam	938	Community	Groundwater
14	Hunters Glen Condominium Ws	Putnam	875	Community	Groundwater
15	Reed Farm Condominiums W.S.	Putnam	600	Community	Groundwater
16	Blackberry Hill	Putnam	500	Community	Groundwater
17	Fahnestock Pelton	Putnam	500	Transient non-community	Groundwater
18	Vails Grove Cooperative	Putnam	500	Community	Groundwater
19	Green Chimneys: Main Well	Putnam	500	Community	Groundwater
20	Fox Run Condominiums	Putnam	475	Community	Groundwater
21	Peaceable Hill Water District	Putnam	475	Community	Groundwater
22	Carmel Wd 4	Putnam	450	Community	Groundwater
23	Chateau Ridge	Putnam	440	Community	Groundwater
24	Rainbow Water	Putnam	432	Community	Groundwater
25	George Fisher Middle School	Putnam	400	Non-transient non-community	Groundwater
26	Hillcrest Water District	Putnam	400	Community	Groundwater
27	Camp Wilbur Herrlich	Putnam	400	Transient non-community	Groundwater
28	Carmel Wd 9	Putnam	400	Community	Groundwater
29	Carmel Wd 14	Putnam	400	Community	Groundwater
30	Carmel Recreation	Putnam	400	Transient non-community	Groundwater
31	Floradan Lodge	Putnam	400	Community	Groundwater
32	Maple Hill Condominium W.S.	Putnam	380	Community	Groundwater
33	Boniville Water Co	Putnam	376	Community	Groundwater
34	Kent Wd 1	Putnam	360	Community	Groundwater
35	Graymoor Village	Putnam	350	Community	Groundwater
36	Misty Hills Water System	Putnam	315	Community	Groundwater
37	Garrison Union Free School	Putnam	300	Non-transient non-community	Groundwater
38	The Trail Club	Putnam	300	Community	Groundwater
39	Brewster Business Park	Putnam	300	Non-transient non-community	Groundwater
40	Drewville Mart, Inc..	Putnam	300	Transient non-community	Groundwater
41	Putnam Valley Elementary Sch	Putnam	300	Non-transient non-community	Groundwater
42	Carmel Wd 12	Putnam	300	Community	Groundwater
43	Lakeview Elementary School	Putnam	300	Non-transient non-community	Groundwater
44	Putnam Valley Professional Building	Putnam	300	Transient non-community	Groundwater
45	Austin Road Elementary School	Putnam	300	Non-transient non-community	Groundwater
46	Carmel Wd 7	Putnam	300	Community	Groundwater
47	Fulmar Road Elementary School	Putnam	300	Non-transient non-community	Groundwater
48	Matthew Paterson Elementary School	Putnam	300	Non-transient non-community	Groundwater
49	Starr Ridge Manor	Putnam	295	Community	Groundwater
50	West Branch Acres	Putnam	292	Community	Groundwater