How many public water systems are in Minnesota?

Minnesota has 6,465 active public water systems in EPA SDWIS records, including 987 community water systems. Together they report serving 5.3M people.

What is the largest water system in Minnesota?

Minneapolis is the largest active public water system in Minnesota, serving a reported 425,300 people.

Does Minnesota rely more on groundwater or surface water?

98.5% of Minnesota's active public water systems draw primarily on groundwater and 1.5% on surface water (including purchased supplies).

Minnesota public water systems

6,465 active systems regulated under the Safe Drinking Water Act, serving a reported 5.3M people across 94 counties.

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

Active systems

6,465

Population served

5.3M

Community systems

987

Groundwater share

98.5%

System types in Minnesota

987

Community water system

470

Non-transient non-community water system

5,008

Transient non-community water system

Largest water systems in Minnesota

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The largest active public water systems in Minnesota by population served
#	Water system	County	Population served	Type	Source
1	Minneapolis	Hennepin	425,300	Community	Surface water
2	Saint Paul Regional Water Services	Ramsey	392,529	Community	Surface water
3	Rochester	Olmsted	123,624	Community	Groundwater
4	Bloomington	Hennepin	91,300	Community	Purchased surface water
5	Brooklyn Park	Hennepin	89,995	Community	Groundwater
6	Duluth	St. Louis	86,859	Community	Surface water
7	Woodbury	Washington	82,643	Community	Groundwater
8	Maple Grove	Hennepin	82,000	Community	Groundwater
9	Plymouth	Hennepin	76,546	Community	Groundwater
10	Saint Cloud	Stearns	71,321	Community	Surface water
11	Blaine	Anoka	70,220	Community	Groundwater
12	Eagan	Dakota	68,223	Community	Groundwater
13	Lakeville	Dakota	67,300	Community	Groundwater
14	Coon Rapids	Anoka	64,000	Community	Groundwater
15	Eden Prairie	Hennepin	63,726	Community	Groundwater
16	Burnsville	Dakota	61,747	Community	Surface water
17	Minnetonka	Hennepin	54,474	Community	Groundwater
18	Edina	Hennepin	53,494	Community	Groundwater
19	Apple Valley	Dakota	50,300	Community	Groundwater
20	Saint Louis Park	Hennepin	50,010	Community	Groundwater
21	Shakopee	Scott	47,000	Community	Groundwater
22	Moorhead	Clay	44,583	Community	Surface water
23	Mankato	Blue Earth	42,803	Community	Groundwater under influence of surface water
24	Cottage Grove	Washington	42,760	Community	Groundwater
25	Richfield	Hennepin	36,899	Community	Groundwater

By county

Crow Wing376 systems St. Louis356 systems Otter Tail270 systems Cass248 systems Anoka241 systems Itasca228 systems Stearns212 systems Hennepin198 systems Washington192 systems Beltrami183 systems Douglas151 systems Hubbard143 systems Becker141 systems Dakota134 systems Wright126 systems Aitkin121 systems Scott111 systems Pine110 systems Chisago104 systems Cook98 systems Morrison96 systems Lake94 systems Mille Lacs91 systems Goodhue90 systems Olmsted81 systems Sherburne78 systems Winona77 systems Carlton75 systems Kandiyohi73 systems Todd72 systems Isanti71 systems Rice70 systems Benton68 systems Carver66 systems Lake of the Woods66 systems Blue Earth63 systems Polk60 systems Fillmore59 systems Freeborn55 systems Pope55 systems Meeker54 systems Mower54 systems Le Sueur50 systems Wabasha49 systems Clay47 systems Houston46 systems Wadena43 systems Ramsey42 systems Roseau41 systems McLeod39 systems Kanabec35 systems Steele35 systems Koochiching33 systems Brown32 systems Clearwater30 systems Redwood30 systems Renville28 systems Waseca28 systems Dodge27 systems Faribault27 systems Murray27 systems Nicollet26 systems Lac qui Parle23 systems Chippewa22 systems Martin22 systems Pennington22 systems Grant21 systems Norman21 systems Stevens21 systems Swift21 systems Sibley20 systems Mahnomen18 systems Big Stone17 systems Marshall17 systems Lyon16 systems Nobles15 systems Jackson13 systems Yellow Medicine13 systems Pipestone12 systems Red Lake12 systems Traverse12 systems Watonwan12 systems Wilkin12 systems Cottonwood11 systems Kittson8 systems Lincoln8 systems Rock8 systems

Carroll1 systems

Chaffee1 systems

Weld1 systems

Luce1 systems

Richland1 systems

Oklahoma1 systems

Burnet1 systems