Brown County, Wisconsin — public water systems

At a glance

148 active public water systems are filed under Brown County, Wisconsin in EPA's SDWIS records, together reporting 246,537 people served. The largest is Green Bay Waterworks, which reports serving 107,369 people. 22 are community water systems serving people where they live; the other 126 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

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

Active systems

148

Population served

246.5K

Community systems

Groundwater share

88.5%

How does Brown County compare with other Wisconsin counties?

Brown County has the 32nd-most active public water systems among the 90 counties listed for active Wisconsin systems in EPA records; among the 74 with 3 or more systems, the median has 140. Its systems report 246,537 people served in total, the 4th-largest county figure in the state and 4.8% of the statewide total. The average system here reports serving 1,666 people, about 3.6 times the Wisconsin average of 469. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Brown County's drinking water come from?

By primary water source, Brown County's active systems draw on groundwater (131, 89%), purchased surface water (16, 11%) and surface water (1, 0.7%). Overall, 89% rely mainly on groundwater (including purchased groundwater) and 11% on surface water, compared with 99% and 0.6% across Wisconsin. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Green Bay Waterworks, draws primarily on surface water.

What kinds of water systems operate in Brown County?

Brown County's active systems break down as 22 community systems (15%), 21 non-transient non-community systems (14%) and 105 transient non-community systems (71%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (72%), local government (28%) and public/private partnership (0.7%).

The 50 largest water systems in Brown County

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Active public water systems in Brown County, Wisconsin
#	Water system	County	Population served	Type	Source
1	Green Bay Waterworks	Brown	107,369	Community	Surface water
2	De Pere Waterworks Sa 1	Brown	25,660	Community	Purchased surface water
3	Howard Waterworks	Brown	21,133	Community	Purchased surface water
4	Ashwaubenon Waterworks	Brown	17,730	Community	Purchased surface water
5	Bellevue Waterworks	Brown	16,715	Community	Purchased surface water
6	Allouez Waterworks	Brown	13,923	Community	Purchased surface water
7	Ledgeview Tn Sanitary Dist 2	Brown	7,602	Community	Purchased surface water
8	Lawrence Waterworks	Brown	5,398	Community	Purchased surface water
9	Suamico Waterworks	Brown	4,697	Community	Groundwater
10	Pulaski Waterworks	Brown	4,040	Community	Groundwater
11	Wrightstown Waterworks	Brown	3,815	Community	Purchased surface water
12	Hobart Waterworks S A 1	Brown	3,670	Community	Purchased surface water
13	Denmark Waterworks	Brown	2,684	Community	Purchased surface water
14	Scott Water Utility Dist	Brown	1,875	Community	Purchased surface water
15	Hobart Waterworks S A 3	Brown	658	Community	Purchased surface water
16	Greenleaf Waterworks	Brown	650	Community	Groundwater
17	Marq, the	Brown	550	Transient non-community	Groundwater
18	Eddie Whipps Banquet Hall	Brown	550	Transient non-community	Groundwater
19	Holland Tn Sanitary Dist	Brown	495	Community	Groundwater
20	Hobart Waterworks S A 2	Brown	450	Community	Purchased surface water
21	Peace Lutheran Church	Brown	411	Transient non-community	Groundwater
22	Lannoye Elementary School	Brown	330	Non-transient non-community	Groundwater
23	Nlc Energy Denmark	Brown	270	Non-transient non-community	Groundwater
24	Beverly Gardens Banquet Hall	Brown	220	Transient non-community	Groundwater
25	Nwtc Universal Driving Facility	Brown	160	Non-transient non-community	Groundwater
26	Zion Lutheran Sch Wayside	Brown	150	Non-transient non-community	Groundwater
27	Dental Health Products Inc.	Brown	130	Non-transient non-community	Groundwater
28	Day By Day Discoveries Child Care	Brown	124	Non-transient non-community	Groundwater
29	Belgioioso New Denmark	Brown	120	Non-transient non-community	Groundwater
30	De Pere Waterworks Sa 2	Brown	118	Community	Purchased surface water
31	Zion Lutheran Sch Morrison	Brown	115	Non-transient non-community	Groundwater
32	Sweet Seasons Restr	Brown	110	Transient non-community	Groundwater
33	Club Chalet Supper Club	Brown	110	Transient non-community	Groundwater
34	Khaptad Mini Mart	Brown	110	Transient non-community	Groundwater
35	Kropps Supper Club	Brown	110	Transient non-community	Groundwater
36	Depreys Frosty Tip	Brown	110	Transient non-community	Groundwater
37	True North 821	Brown	110	Transient non-community	Groundwater
38	Wouters Front Bar & Grill	Brown	110	Transient non-community	Groundwater
39	Barleys Deerfield Diner	Brown	110	Transient non-community	Groundwater
40	Royal Scot Golf Course	Brown	110	Transient non-community	Groundwater
41	Brown Co Golf Clubhouse	Brown	110	Transient non-community	Groundwater
42	Brown Co Golf Maintenance	Brown	110	Transient non-community	Groundwater
43	Maplewood Shell Mini Mart Arbys	Brown	110	Transient non-community	Groundwater
44	Davisters Bar & Restaurant LLC	Brown	110	Transient non-community	Groundwater
45	Humboldt Haus Banquet Hall	Brown	100	Transient non-community	Groundwater
46	Maplewood Meats	Brown	100	Non-transient non-community	Groundwater
47	S & L Motors	Brown	85	Non-transient non-community	Groundwater
48	Belgioioso Glenmore	Brown	82	Non-transient non-community	Groundwater
49	Alleluia Lutheran Ch	Brown	59	Non-transient non-community	Groundwater
50	Dairyland Farm LLC	Brown	54	Non-transient non-community	Groundwater

All other water systems in Brown County (98)

The remaining active systems filed under Brown County, largest first, with the population each reports serving.

Brown County water systems: frequently asked questions

How many public water systems are in Brown County, Wisconsin?

EPA's SDWIS records file 148 active public water systems under Brown County, Wisconsin: 22 community systems (15%), 21 non-transient non-community systems (14%) and 105 transient non-community systems (71%).

Who supplies drinking water in Brown County, WI?

The largest community water systems filed under Brown County are Green Bay Waterworks (107,369 people served), De Pere Waterworks Sa 1 (25,660 people served) and Howard Waterworks (21,133 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Brown County's drinking water come from groundwater or surface water?

Of the 148 active public water systems in Brown County, 89% draw mainly on groundwater and 11% on surface water, counting purchased supplies. The largest system, Green Bay Waterworks, uses surface water.

Where can I find a water quality report for Brown County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 22 community systems are filed under Brown County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Brown County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Wisconsin water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Brown County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/brown (data as of October 1, 2026).