Waukesha County, Wisconsin — public water systems

589 active public water systems serve Waukesha County, reporting 322.7K people served.

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

Active systems

589

Population served

322.7K

Community systems

Groundwater share

99.3%

Water systems in Waukesha County

Active public water systems in Waukesha County, Wisconsin
#	Water system	County	Population served	Type	Source
1	Waukesha Water Utility	Waukesha	70,718	Community	Purchased surface water
2	Brookfield Water Utility	Waukesha	29,070	Community	Groundwater
3	New Berlin Water Utility	Waukesha	27,899	Community	Purchased surface water
4	Menomonee Falls Ww - Surface Water	Waukesha	23,867	Community	Purchased surface water
5	Oconomowoc Waterworks	Waukesha	15,805	Community	Groundwater
6	Sussex Village Hall & Water Utility	Waukesha	11,750	Community	Groundwater
7	Hartland Waterworks	Waukesha	9,212	Community	Groundwater
8	Pewaukee City Water and Sewer Utility	Waukesha	8,671	Community	Groundwater
9	Mukwonago Waterworks	Waukesha	8,190	Community	Groundwater
10	Pewaukee Village Waterworks	Waukesha	8,166	Community	Groundwater
11	Muskego Water Utility	Waukesha	8,150	Community	Groundwater
12	Town of Brookfield San Dist 4	Waukesha	6,419	Community	Groundwater
13	Dousman Water Utility	Waukesha	2,350	Community	Groundwater
14	Butler Waterworks	Waukesha	2,181	Community	Purchased surface water
15	Prairie Village Water Trust	Waukesha	2,100	Community	Groundwater
16	Eagle Waterworks	Waukesha	1,950	Community	Groundwater
17	Wales Pick N Save	Waukesha	1,900	Non-transient non-community	Groundwater
18	Kwik Trip #1108	Waukesha	1,810	Transient non-community	Groundwater
19	Menomonee Falls Ww - Groundwater	Waukesha	1,796	Community	Groundwater
20	Kettle Moraine High School & Wales Elem School	Waukesha	1,670	Non-transient non-community	Groundwater
21	Fleet Farm Muskego Main Store	Waukesha	1,585	Non-transient non-community	Groundwater
22	Kwik Trip #973	Waukesha	1,404	Transient non-community	Groundwater
23	New Berlin West Middle High School	Waukesha	1,380	Non-transient non-community	Groundwater
24	Elmbrook Memorial Hospital	Waukesha	1,250	Non-transient non-community	Groundwater
25	Mcdonalds Vernon	Waukesha	1,250	Non-transient non-community	Groundwater
26	Merton Intermediate & Primary School	Waukesha	1,130	Non-transient non-community	Groundwater
27	Pilgrim Park Middle School	Waukesha	950	Non-transient non-community	Groundwater
28	Kwik Trip 360 Oconomowoc	Waukesha	906	Transient non-community	Groundwater
29	Mill Creek Academy	Waukesha	886	Non-transient non-community	Groundwater
30	Generac Power Systems Inc.	Waukesha	875	Non-transient non-community	Groundwater
31	Lake Denoon Middle School	Waukesha	825	Non-transient non-community	Groundwater
32	Cross Point Community Church	Waukesha	764	Transient non-community	Groundwater
33	Lake Meadows Water Trust	Waukesha	750	Community	Groundwater
34	Hale Park Meadows	Waukesha	720	Community	Groundwater
35	Christ Lutheran School and Church	Waukesha	704	Non-transient non-community	Groundwater
36	Durham Meadows Water Trust	Waukesha	700	Community	Groundwater
37	Rolling Hills Elementary Schl	Waukesha	666	Non-transient non-community	Groundwater
38	Waukesha Bible Church	Waukesha	654	Transient non-community	Groundwater
39	Rose Glen Elementary	Waukesha	652	Non-transient non-community	Groundwater
40	Dayspring Baptist Church Inc.	Waukesha	636	Non-transient non-community	Groundwater
41	Lake Country School	Waukesha	623	Non-transient non-community	Groundwater
42	St Marys School & St Marys Parish	Waukesha	606	Non-transient non-community	Groundwater
43	Elmbrook- Lake Country	Waukesha	600	Non-transient non-community	Groundwater
44	Delafield Square	Waukesha	587	Community	Groundwater
45	Nrf Viii - Autumn Grove LLC	Waukesha	578	Non-transient non-community	Groundwater
46	Dotties Home Bakery & Liquor	Waukesha	567	Transient non-community	Groundwater
47	Prairie View Elementary School	Waukesha	565	Non-transient non-community	Groundwater
48	Abundant Life Apostolic Church	Waukesha	543	Non-transient non-community	Groundwater
49	Section Elementary School	Waukesha	540	Non-transient non-community	Groundwater
50	Richmond School	Waukesha	533	Non-transient non-community	Groundwater