Public water system · ND2800194

Active

Coleharbor City of

At a glance

City of Coleharbor (PWSID ND2800194) is an active community water system in McLean County, North Dakota. It reports serving 79 people through 47 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

GWP

Purchased groundwater

System type

CWS

Community water system

System record

PWSIDND2800194

System typeCommunity water system

Activity statusActive

Population served79

Service connections47

Primary water sourcePurchased groundwater

Owner typeLocal government

Primacy agencyND state drinking water program

City servedColeharbor

StateNorth Dakota

ZIP—

CountyMcLean County

How does City of Coleharbor compare with other water systems in McLean County?

By EPA's size categories, City of Coleharbor is a very small system (500 people or fewer). McLean County has 13 active public water systems. Its population served is well below the county average of 746 people per system, and accounts for 0.8% of the 9,697 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 Coleharbor 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 114 North Dakota systems (28%) list purchased groundwater as their primary source.

Who owns and regulates City of Coleharbor?

EPA lists City of Coleharbor 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. 9 of the 13 active systems in McLean County (69%) are also owned by a local government.

Does City of Coleharbor have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025. The violations listed here began between January 1999 and November 2025. By type: 10 monitoring and reporting, 1 reporting and 1 monitoring. The contaminant or rule involved most often is Chlorine (4 of them). EPA lists 10 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. 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
2025-11-19	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Resolved
2022-10-19	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2022-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2021-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2021-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2015-11-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2015-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2009-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
1999-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
1999-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived

The 12 most recent violations in EPA's records, newest first. 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.

City of Coleharbor: frequently asked questions

Who runs City of Coleharbor?

City of Coleharbor (PWSID ND2800194) 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 Coleharbor serve?

City of Coleharbor reports serving 79 people through 47 service connections in McLean County, North Dakota.

Where does City of Coleharbor get its water?

EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.

Does City of Coleharbor have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025. 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 City of Coleharbor'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025. 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 Coleharbor's water quality report?

As a community water system, City of Coleharbor 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 McLean County

Water system	County	Population served	Type	Source
Garrison Rural Water District	McLean	1,805	Community	Purchased surface water
Mclean-Sheridan Water District-System 1	McLean	1,800	Community	Groundwater
Garrison City of	McLean	1,453	Community	Surface water
Washburn City of	McLean	1,246	Community	Surface water
Underwood City of	McLean	778	Community	Purchased surface water
Turtle Lake City of	McLean	581	Community	Purchased 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, “Coleharbor City of, PWSID ND2800194, North Dakota”, https://aquacensus.com/water-systems/north-dakota/coleharbor-city-of-nd2800194 (data as of October 1, 2026).