DuPage County, Illinois — public water systems

158 active public water systems serve DuPage County, reporting 860.9K people served.

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

Active systems

158

Population served

860.9K

Community systems

Groundwater share

73.4%

Water systems in DuPage County

Active public water systems in DuPage County, Illinois
#	Water system	County	Population served	Type	Source
1	Naperville	DuPage	156,406	Community	Purchased surface water
2	Wheaton	DuPage	53,970	Community	Purchased surface water
3	Downers Grove	DuPage	49,425	Community	Purchased surface water
4	Elmhurst	DuPage	45,000	Community	Purchased surface water
5	Lombard	DuPage	44,476	Community	Purchased surface water
6	Carol Stream	DuPage	39,854	Community	Purchased surface water
7	Addison	DuPage	38,017	Community	Purchased surface water
8	Woodridge	DuPage	33,566	Community	Purchased surface water
9	Glendale Heights	DuPage	33,176	Community	Purchased surface water
10	Glen Ellyn	DuPage	28,850	Community	Purchased surface water
11	West Chicago	DuPage	25,166	Community	Groundwater
12	Lisle	DuPage	24,233	Community	Purchased surface water
13	Westmont	DuPage	24,161	Community	Purchased surface water
14	Roselle	DuPage	22,897	Community	Purchased surface water
15	Villa Park	DuPage	22,263	Community	Purchased surface water
16	Bloomingdale	DuPage	22,018	Community	Purchased surface water
17	Darien	DuPage	21,751	Community	Purchased surface water
18	Bensenville	DuPage	18,537	Community	Purchased surface water
19	Hinsdale	DuPage	17,900	Community	Purchased surface water
20	Wood Dale	DuPage	14,012	Community	Purchased surface water
21	Warrenville	DuPage	12,350	Community	Groundwater
22	Burr Ridge	DuPage	11,192	Community	Purchased surface water
23	Winfield	DuPage	9,835	Community	Purchased surface water
24	Itasca	DuPage	9,506	Community	Purchased surface water
25	Oak Brook	DuPage	9,400	Community	Purchased surface water
26	Willowbrook	DuPage	9,000	Community	Purchased surface water
27	Clarendon Hills	DuPage	8,702	Community	Purchased surface water
28	Southeast Regional Water Facility	DuPage	6,940	Community	Purchased surface water
29	Il American-Valley View	DuPage	6,721	Community	Purchased surface water
30	Il American-Dupage Utility	DuPage	6,613	Community	Purchased surface water
31	Aqua Illinois-Oak Brook	DuPage	5,361	Community	Purchased surface water
32	Il American-Liberty Ridge West	DuPage	3,307	Community	Purchased surface water
33	Glen Ellyn Heights Subdivision	DuPage	1,931	Community	Purchased surface water
34	Steeple Run Sbdv	DuPage	1,931	Community	Purchased surface water
35	Il American-Arrowhead	DuPage	1,581	Community	Purchased surface water
36	Oakbrook Terrace	DuPage	1,440	Community	Purchased surface water
37	York Township Water System	DuPage	1,423	Community	Purchased surface water
38	Il American-Country Club	DuPage	1,014	Community	Purchased surface water
39	Liberty Park Homeowners Association	DuPage	950	Community	Groundwater
40	Prairie Path Water Company-Clarendon	DuPage	850	Community	Groundwater
41	Community Fellowship Church	DuPage	800	Transient non-community	Groundwater
42	North Regional Water Fac	DuPage	770	Community	Groundwater
43	Il American-Lombard Heights	DuPage	679	Community	Purchased surface water
44	Wayne School	DuPage	625	Non-transient non-community	Groundwater
45	Indian Knoll School Dist 33	DuPage	600	Non-transient non-community	Groundwater
46	Marianjoy Rehab Hospital	DuPage	500	Non-transient non-community	Purchased groundwater
47	Hobson Valley Water System	DuPage	400	Community	Purchased surface water
48	Il American-Liberty Ridge East	DuPage	320	Community	Purchased surface water
49	Living Hope Bible Church	DuPage	300	Transient non-community	Groundwater
50	Blackwell Youth Camp Well Dw-002	DuPage	300	Transient non-community	Groundwater