Lake County, Indiana — public water systems

110 active public water systems serve Lake County, reporting 533K people served.

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

Active systems

110

Population served

533K

Community systems

Groundwater share

90%

Water systems in Lake County

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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	Schererville Water Department	Lake	30,000	Community	Purchased surface water
4	Crown Point Water Works	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	Flying J #653	Lake	1,450	Non-transient non-community	Groundwater
17	Lowell Commons	Lake	1,440	Non-transient non-community	Groundwater
18	Aqua Indiana Water Company	Lake	1,350	Community	Purchased groundwater
19	Cedar Lake - Robins Nest	Lake	950	Community	Groundwater
20	Apple Valley Utilities, Inc..	Lake	712	Community	Groundwater
21	Luke Oil #293	Lake	606	Transient non-community	Groundwater
22	Winfield Elementary School	Lake	546	Non-transient non-community	Groundwater
23	Lake Prairie Elementary	Lake	540	Non-transient non-community	Groundwater
24	Little Calumet River Basin-Artesian Well	Lake	500	Transient non-community	Groundwater
25	Bethel Church Cedar Lake	Lake	473	Transient non-community	Groundwater
26	Dyer Indoor Soccer Arena	Lake	302	Transient non-community	Groundwater
27	Lighthouse Restaurant at Paradise Cove	Lake	275	Transient non-community	Groundwater
28	Schneider Water Department	Lake	267	Community	Groundwater
29	Lakeshore Subdivision Association, Inc..	Lake	265	Community	Groundwater
30	Harry Os	Lake	220	Transient non-community	Groundwater
31	Fairway Regional Water District	Lake	210	Community	Groundwater
32	St. Michael the Archangel Church	Lake	200	Transient non-community	Groundwater
33	Cedar Lake Mobile Home Park	Lake	200	Community	Groundwater
34	Northwest Indiana Islamic Center	Lake	199	Non-transient non-community	Groundwater
35	Boys and Girls Clubs of Nw in-Cedar Lake	Lake	160	Transient non-community	Groundwater
36	Hillside Community Church	Lake	155	Transient non-community	Groundwater
37	Hanover North Professional Building	Lake	150	Non-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	Grace Evangelical Lutheran Church	Lake	140	Transient non-community	Groundwater
41	Subway/R.A.K. Holdings LLC	Lake	129	Transient non-community	Groundwater
42	Palmira Golf & Country Club	Lake	129	Transient non-community	Groundwater
43	Apple Valley East	Lake	117	Non-transient non-community	Groundwater
44	Town of Cedar Lake - Complex & Pumphouse	Lake	115	Transient non-community	Groundwater
45	Holy Name Ch./Grand Tots Daycare	Lake	115	Non-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