New London County, Connecticut — public water systems

395 active public water systems serve New London County, reporting 209K people served.

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

Active systems

395

Population served

209K

Community systems

Groundwater share

96.2%

Water systems in New London County

Active public water systems in New London County, Connecticut
#	Water system	County	Population served	Type	Source
1	Norwich Public Utilities	New London	36,163	Community	Surface water
2	Groton Utilities	New London	30,200	Community	Surface water
3	New London Dept. of Public Utilities	New London	27,620	Community	Surface water
4	Waterford Wpca	New London	16,578	Community	Purchased surface water
5	East Lyme Water & Sewer Commission	New London	15,245	Community	Purchased surface water
6	Aquarion-Mystic	New London	10,788	Community	Surface water
7	Jewett City Water Company	New London	6,840	Community	Surface water
8	Colchester Sewer & Water Commission	New London	4,020	Community	Groundwater
9	Ledyard Wpca - Ledyard Center	New London	3,294	Community	Purchased surface water
10	Ctwc - Shoreline Region-Sound View	New London	3,028	Community	Groundwater
11	Scwa, Montville Division (Mtv)	New London	2,570	Community	Groundwater
12	Scwa, Tower-Ferry View Division	New London	2,567	Community	Groundwater
13	Groton Long Point Association	New London	2,400	Community	Purchased surface water
14	Ledyard Wpca, Gales Ferry System	New London	2,369	Community	Purchased surface water
15	Noank Fire District	New London	1,947	Community	Purchased surface water
16	Scwa, North Stonington Division (Nst)	New London	1,860	Community	Groundwater
17	Leonard J.Tyl Middle School&High School	New London	1,466	Non-transient non-community	Groundwater
18	Scwa, Mohegan Division	New London	1,428	Community	Groundwater
19	Montville Water Supply	New London	1,300	Community	Purchased surface water
20	Region 18 Schools - Lyme Street	New London	1,102	Non-transient non-community	Groundwater
21	Ctwc - Shoreline Region-Point O Woods	New London	1,068	Community	Groundwater
22	Sprague Water & Sewer Authority	New London	1,058	Community	Groundwater
23	Strawberry Park	New London	1,047	Non-transient non-community	Groundwater
24	St. Bernard School	New London	950	Non-transient non-community	Groundwater
25	Scwa, Oakdale Heights Division	New London	876	Community	Groundwater
26	Hopeville Pond S.P./Beach-Well #2	New London	800	Transient non-community	Groundwater
27	Indian Field Coop Campground Assn., Inc..	New London	685	Non-transient non-community	Groundwater
28	Salem Elementary School	New London	675	Non-transient non-community	Groundwater
29	Scwa, Ledyard Center Division	New London	652	Community	Groundwater
30	Lisbon Central School	New London	620	Non-transient non-community	Groundwater
31	Preston Plains Water Company	New London	550	Community	Groundwater
32	Lebanon Elementary School	New London	525	Non-transient non-community	Groundwater
33	Scwa, Chesterfield Division	New London	524	Community	Groundwater
34	C E Murphy School	New London	520	Non-transient non-community	Groundwater
35	Preston Veterans Memorial School	New London	500	Non-transient non-community	Groundwater
36	Kitemaug Orchard Association, Inc..	New London	490	Community	Groundwater
37	Scwa, Hillcrest Division (Hlc)	New London	450	Community	Purchased surface water
38	Ctwc - Shoreline Region-Masons Island	New London	445	Community	Purchased surface water
39	Ctwc - Bay Mountain	New London	440	Community	Groundwater
40	Lebanon Middle School	New London	415	Non-transient non-community	Groundwater
41	Lyman Memorial High School	New London	412	Non-transient non-community	Groundwater
42	Aquarion-Arlington Acres	New London	392	Community	Groundwater
43	Scwa, Robin Hill Division (Rbn)	New London	388	Community	Groundwater
44	Scwa, Cedar Ridge Division	New London	370	Community	Groundwater
45	Voluntown Elementary School	New London	365	Non-transient non-community	Groundwater
46	Aquarion-Pleasure Valley	New London	328	Community	Groundwater
47	Jewett City Water Co., S & W System	New London	320	Community	Groundwater
48	Classee Water System - Latimer Point	New London	316	Non-transient non-community	Purchased surface water
49	Pachaug Marina Campground	New London	310	Non-transient non-community	Groundwater
50	Church of Christ the King	New London	305	Transient non-community	Groundwater