Public water system · ND4100428
ActiveGwinner City of
At a glance
City of Gwinner (PWSID ND4100428) is an active community water system in Sargent County, North Dakota. It reports serving 753 people through 230 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
753
Service connections
230
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Gwinner compare with other water systems in Sargent County?
By EPA's size categories, City of Gwinner is a small system (501 to 3,300 people). Sargent County has 5 active public water systems, and City of Gwinner is the largest of them by population served. Its population served is about 72% above the county average of 437 people per system, and accounts for 34% of the 2,183 people reported by systems filed under the county. Across North Dakota, the 403 active systems average 1,864 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Gwinner is well below that figure.
What does “community water system” mean?
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. North Dakota has 317 active community water systems, 79% of the state's 403 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 177 North Dakota systems (44%) list groundwater as their primary source.
Who owns and regulates City of Gwinner?
EPA lists City of Gwinner as owned by a local government. The ND state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 5 active systems in Sargent County (100%) are also owned by a local government.
Does City of Gwinner have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for City of Gwinner. For the latest compliance status, check EPA ECHO for current compliance history.
City of Gwinner: frequently asked questions
Who runs City of Gwinner?
City of Gwinner (PWSID ND4100428) is a community water system owned by a local government. It is regulated by the ND state drinking water program.
How many people does City of Gwinner serve?
City of Gwinner reports serving 753 people through 230 service connections in Sargent County, North Dakota.
Where does City of Gwinner get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does City of Gwinner have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is City of Gwinner's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the ND state drinking water program.
Where can I find City of Gwinner's water quality report?
As a community water system, City of Gwinner must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Sargent County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Milnor City of | Sargent | 653 | Community | Purchased groundwater |
| Forman City of | Sargent | 504 | Community | Groundwater |
| Rutland City of | Sargent | 163 | Community | Purchased groundwater |
| Sundale Hutterian Association | Sargent | 110 | Community | Groundwater |
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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, “Gwinner City of, PWSID ND4100428, North Dakota”, https://aquacensus.com/water-systems/north-dakota/gwinner-city-of-nd4100428 (data as of October 1, 2026).