McLean County, North Dakota — public water systems
At a glance
13 active public water systems are filed under McLean County, North Dakota in EPA's SDWIS records, together reporting 9,697 people served. The largest is Garrison Rural Water District, which reports serving 1,805 people. 12 are community water systems serving people where they live; the other 1 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
13
Population served
9.7K
Community systems
12
Groundwater share
38.5%
How does McLean County compare with other North Dakota counties?
McLean County has the 6th-most active public water systems among the 61 counties listed for active North Dakota systems in EPA records; among the 49 with 3 or more systems, the median has 6. Its systems report 9,697 people served in total, the 14th-largest county figure in the state and 1.3% of the statewide total. The average system here reports serving 746 people, about 60% below the North Dakota average of 1,864. 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 McLean County's drinking water come from?
By primary water source, McLean County's active systems draw on purchased groundwater (4, 31%), surface water (4, 31%), purchased surface water (4, 31%) and groundwater (1, 7.7%). Overall, 38% rely mainly on groundwater (including purchased groundwater) and 62% on surface water, compared with 74% and 26% across North Dakota. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. The county's largest system, Garrison Rural Water District, draws primarily on purchased surface water.
What kinds of water systems operate in McLean County?
McLean County's active systems break down as 12 community systems (92%) and 1 non-transient non-community systems (7.7%). 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. EPA lists their owner types as local government (69%) and private (31%).
Water systems in McLean County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Garrison Rural Water District | McLean | 1,805 | Community | Purchased surface water |
| 2 | Mclean-Sheridan Water District-System 1 | McLean | 1,800 | Community | Groundwater |
| 3 | Garrison City of | McLean | 1,453 | Community | Surface water |
| 4 | Washburn City of | McLean | 1,246 | Community | Surface water |
| 5 | Underwood City of | McLean | 778 | Community | Purchased surface water |
| 6 | Turtle Lake City of | McLean | 581 | Community | Purchased groundwater |
| 7 | Rainbow Energy Center | McLean | 532 | Non-transient non-community | Surface water |
| 8 | Mclean-Sheridan Water District-System 3 | McLean | 400 | Community | Purchased surface water |
| 9 | Mclean-Sheridan Water District-System 2 | McLean | 390 | Community | Purchased surface water |
| 10 | Max City of | McLean | 334 | Community | Purchased groundwater |
| 11 | Riverdale City of | McLean | 205 | Community | Surface water |
| 12 | Mercer City of | McLean | 94 | Community | Purchased groundwater |
| 13 | Coleharbor City of | McLean | 79 | Community | Purchased groundwater |
McLean County water systems: frequently asked questions
How many public water systems are in McLean County, North Dakota?
EPA's SDWIS records file 13 active public water systems under McLean County, North Dakota: 12 community systems (92%) and 1 non-transient non-community systems (7.7%).
Who supplies drinking water in McLean County, ND?
The largest community water systems filed under McLean County are Garrison Rural Water District (1,805 people served), Mclean-Sheridan Water District-System 1 (1,800 people served) and City of Garrison (1,453 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 McLean County's drinking water come from groundwater or surface water?
Of the 13 active public water systems in McLean County, 38% draw mainly on groundwater and 62% on surface water, counting purchased supplies. The largest system, Garrison Rural Water District, uses purchased surface water.
Where can I find a water quality report for McLean 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. 12 community systems are filed under McLean 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 McLean 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 North Dakota water systems
- All North Dakota public water systems· 403 active
- Bottineau County· 21 systems
- Williams County· 19 systems
- Richland County· 14 systems
- Ward County· 14 systems
- Morton County· 13 systems
- Burleigh County· 12 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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 McLean County, North Dakota”, https://aquacensus.com/water-systems/north-dakota/mclean (data as of October 1, 2026).