Public water system · ND3201072
ActiveTri-County Water District
At a glance
Tri-County Water District (PWSID ND3201072) is an active community water system in Nelson County, North Dakota. It reports serving 2,501 people through 995 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in April 1997.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,501
Service connections
995
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Tri-County Water District compare with other water systems in Nelson County?
By EPA's size categories, Tri-County Water District is a small system (501 to 3,300 people). Nelson County has 6 active public water systems, and Tri-County Water District is the largest of them by population served. Its population served is about 3.6 times the county average of 701 people per system, and accounts for 59% of the 4,204 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 Tri-County Water District is about 63% 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 Tri-County Water District?
EPA lists Tri-County Water District as privately owned. 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. 1 of the 6 active systems in Nelson County (17%) are also privately owned.
Does Tri-County Water District have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 1997. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1997-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Tri-County Water District: frequently asked questions
Who runs Tri-County Water District?
Tri-County Water District (PWSID ND3201072) is a community water system privately owned. It is regulated by the ND state drinking water program.
How many people does Tri-County Water District serve?
Tri-County Water District reports serving 2,501 people through 995 service connections in Nelson County, North Dakota.
Where does Tri-County Water District 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 Tri-County Water District have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 1997. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Tri-County Water District'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 records list one violation for this system; it is not health-based, and the most recent began in April 1997. For current results, consult the system's annual water quality report, EPA ECHO, or the ND state drinking water program.
Where can I find Tri-County Water District's water quality report?
As a community water system, Tri-County Water District 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 Nelson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lakota City of | Nelson | 672 | Community | Groundwater |
| Mcville City of | Nelson | 349 | Community | Groundwater |
| Michigan City of | Nelson | 294 | Community | Groundwater |
| Aneta City of | Nelson | 222 | Community | Purchased groundwater |
| Tolna City of | Nelson | 166 | Community | Purchased groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Tri-County Water District, PWSID ND3201072, North Dakota”, https://aquacensus.com/water-systems/north-dakota/tri-county-water-district-nd3201072 (data as of October 1, 2026).