Traill County, North Dakota — public water systems
At a glance
5 active public water systems are filed under Traill County, North Dakota in EPA's SDWIS records, together reporting 7,644 people served. The largest is East Central Regional Wd-Traill, which reports serving 2,800 people. All 5 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
5
Population served
7.6K
Community systems
5
Groundwater share
100%
How does Traill County compare with other North Dakota counties?
Traill County has the 34th-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 7,644 people served in total, the 17th-largest county figure in the state and 1% of the statewide total. The average system here reports serving 1,529 people, about 18% 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 Traill County's drinking water come from?
By primary water source, Traill County's active systems draw on purchased groundwater (3, 60%) and groundwater (2, 40%). Overall, all rely mainly on groundwater (including purchased groundwater) and none 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, East Central Regional Wd-Traill, draws primarily on groundwater.
What kinds of water systems operate in Traill County?
Traill County's active systems break down as 5 community systems (100%). 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. EPA lists their owner types as local government (80%) and private (20%).
Water systems in Traill County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | East Central Regional Wd-Traill | Traill | 2,800 | Community | Groundwater |
| 2 | Mayville City of | Traill | 1,858 | Community | Purchased groundwater |
| 3 | Hillsboro City of | Traill | 1,603 | Community | Groundwater |
| 4 | Hatton City of | Traill | 777 | Community | Purchased groundwater |
| 5 | Portland City of | Traill | 606 | Community | Purchased groundwater |
Traill County water systems: frequently asked questions
How many public water systems are in Traill County, North Dakota?
EPA's SDWIS records file 5 active public water systems under Traill County, North Dakota: 5 community systems (100%).
Who supplies drinking water in Traill County, ND?
The largest community water systems filed under Traill County are East Central Regional Wd-Traill (2,800 people served), City of Mayville (1,858 people served) and City of Hillsboro (1,603 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 Traill County's drinking water come from groundwater or surface water?
Of the 5 active public water systems in Traill County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, East Central Regional Wd-Traill, uses groundwater.
Where can I find a water quality report for Traill 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. 5 community systems are filed under Traill 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 Traill 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 Traill County, North Dakota”, https://aquacensus.com/water-systems/north-dakota/traill (data as of October 1, 2026).