Dunn County, North Dakota — public water systems
At a glance
7 active public water systems are filed under Dunn County, North Dakota in EPA's SDWIS records, together reporting 1,525 people served. The largest is City of Killdeer, which reports serving 939 people. 6 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
7
Population served
1.5K
Community systems
6
Groundwater share
14.3%
How does Dunn County compare with other North Dakota counties?
Dunn County has the 19th-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 1,525 people served in total, the 37th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 218 people, well 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 Dunn County's drinking water come from?
By primary water source, Dunn County's active systems draw on purchased surface water (6, 86%) and groundwater (1, 14%). Overall, 14% rely mainly on groundwater (including purchased groundwater) and 86% on surface water, compared with 74% and 26% across North Dakota. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, City of Killdeer, draws primarily on purchased surface water.
What kinds of water systems operate in Dunn County?
Dunn County's active systems break down as 6 community systems (86%) and 1 transient non-community systems (14%). 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 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 local government (71%) and private (29%).
Water systems in Dunn County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Killdeer City of | Dunn | 939 | Community | Purchased surface water |
| 2 | Halliday City of | Dunn | 188 | Community | Purchased surface water |
| 3 | Dunn Center City of | Dunn | 146 | Community | Purchased surface water |
| 4 | Dodge City of | Dunn | 87 | Community | Purchased surface water |
| 5 | New Hradec Waterworks | Dunn | 60 | Community | Purchased surface water |
| 6 | Manning Water Board | Dunn | 55 | Community | Purchased surface water |
| 7 | Medicine Hole Golf Course | Dunn | 50 | Transient non-community | Groundwater |
Dunn County water systems: frequently asked questions
How many public water systems are in Dunn County, North Dakota?
EPA's SDWIS records file 7 active public water systems under Dunn County, North Dakota: 6 community systems (86%) and 1 transient non-community systems (14%).
Who supplies drinking water in Dunn County, ND?
The largest community water systems filed under Dunn County are City of Killdeer (939 people served), City of Halliday (188 people served) and City of Dunn Center (146 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 Dunn County's drinking water come from groundwater or surface water?
Of the 7 active public water systems in Dunn County, 14% draw mainly on groundwater and 86% on surface water, counting purchased supplies. The largest system, City of Killdeer, uses purchased surface water.
Where can I find a water quality report for Dunn 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. 6 community systems are filed under Dunn 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 Dunn 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
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 Dunn County, North Dakota”, https://aquacensus.com/water-systems/north-dakota/dunn (data as of October 1, 2026).