Lake County, Indiana — public water systems

108 active public water systems serve Lake County, reporting 537K people served.

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

Active systems

108

Population served

537K

Community systems

Groundwater share

88.9%

Water systems in Lake County

Active public water systems in Lake County, Indiana
#	Water system	County	Population served	Type	Source
1	Indiana American Water - Northwest	Lake	210,510	Community	Surface water
2	Hammond Water Works Department	Lake	78,384	Community	Surface water
3	Crown Point Water Works	Lake	30,000	Community	Purchased surface water
4	Schererville Water Department	Lake	30,000	Community	Purchased surface water
5	East Chicago Water Works	Lake	26,370	Community	Surface water
6	St. John Municipal Water Utility	Lake	25,700	Community	Groundwater
7	Highland Water Works	Lake	23,984	Community	Purchased surface water
8	Munster Water Company	Lake	23,894	Community	Purchased surface water
9	Griffith Water Department	Lake	16,893	Community	Purchased surface water
10	Dyer Water Department	Lake	16,800	Community	Purchased surface water
11	Indiana American Water - Lowell	Lake	11,908	Community	Groundwater under influence of surface water
12	Cuii - Twin Lakes	Lake	8,000	Community	Groundwater
13	New Chicago Water Works	Lake	5,500	Community	Purchased surface water
14	Whiting Water Department	Lake	4,900	Community	Purchased surface water
15	Cedar Lake Water Works	Lake	4,600	Community	Groundwater
16	Cuii - Indiana Water Service	Lake	4,200	Community	Purchased surface water
17	Flying J #653	Lake	1,450	Non-transient non-community	Groundwater
18	Lowell Commons	Lake	1,440	Non-transient non-community	Groundwater
19	Aqua Indiana Water Company	Lake	1,350	Community	Purchased groundwater
20	Cedar Lake - Robins Nest	Lake	950	Community	Groundwater
21	Apple Valley Utilities, Inc..	Lake	712	Community	Groundwater
22	Luke Oil #293	Lake	606	Transient non-community	Groundwater
23	Winfield Elementary School	Lake	546	Non-transient non-community	Groundwater
24	Lake Prairie Elementary	Lake	540	Non-transient non-community	Groundwater
25	Little Calumet River Basin-Artesian Well	Lake	500	Transient non-community	Groundwater
26	Bethel Church Cedar Lake	Lake	473	Transient non-community	Groundwater
27	Dyer Indoor Soccer Arena	Lake	302	Transient non-community	Groundwater
28	Lighthouse Restaurant at Paradise Cove	Lake	275	Transient non-community	Groundwater
29	Schneider Water Department	Lake	267	Community	Groundwater
30	Lakeshore Subdivision Association, Inc..	Lake	265	Community	Groundwater
31	Harry Os	Lake	220	Transient non-community	Groundwater
32	Fairway Regional Water District	Lake	210	Community	Groundwater
33	Cedar Lake Mobile Home Park	Lake	200	Community	Groundwater
34	St. Michael the Archangel Church	Lake	200	Transient non-community	Groundwater
35	Northwest Indiana Islamic Center	Lake	199	Non-transient non-community	Groundwater
36	Hillside Community Church	Lake	190	Non-transient non-community	Groundwater
37	Boys and Girls Clubs of Nw in-Cedar Lake	Lake	160	Transient non-community	Groundwater
38	Cedar Lake Bible Conference Grounds	Lake	150	Community	Groundwater
39	Protection of the Virgin Mary Orth Ch	Lake	150	Transient non-community	Groundwater
40	Hanover North Professional Building	Lake	150	Non-transient non-community	Groundwater
41	Grace Evangelical Lutheran Church	Lake	140	Transient non-community	Groundwater
42	Palmira Golf & Country Club	Lake	129	Transient non-community	Groundwater
43	Subway/R.A.K. Holdings LLC	Lake	129	Transient non-community	Groundwater
44	Holy Name Ch./Grand Tots Daycare	Lake	115	Non-transient non-community	Groundwater
45	Town of Cedar Lake - Complex & Pumphouse	Lake	115	Transient non-community	Groundwater
46	Ross Baptist Church	Lake	110	Transient non-community	Groundwater
47	Indian Ridge Golf Course	Lake	106	Transient non-community	Groundwater
48	The Sandbar Grill	Lake	104	Transient non-community	Groundwater
49	Tastee Top	Lake	104	Transient non-community	Groundwater
50	Cedar Lake China House	Lake	103	Transient non-community	Groundwater