Public water system · ND0900166
ActiveCasselton City of
At a glance
City of Casselton (PWSID ND0900166) is an active community water system in Cass County, North Dakota. It reports serving 2,513 people through 575 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in April 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,513
Service connections
575
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does City of Casselton compare with other water systems in Cass County?
By EPA's size categories, City of Casselton is a small system (501 to 3,300 people). Cass County has 27 active public water systems, and City of Casselton is the 5th-largest of them by population served. Its population served is about 62% below the county average of 6,547 people per system, and accounts for 1.4% of the 176,764 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 Casselton 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. 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 Casselton?
EPA lists City of Casselton 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. 19 of the 27 active systems in Cass County (70%) are also owned by a local government.
Does City of Casselton have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in April 2012. The violations listed here began between July 1991 and April 2012. By type: 3 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as resolved and 1 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 |
|---|---|---|---|---|
| 2012-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1991-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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 Casselton: frequently asked questions
Who runs City of Casselton?
City of Casselton (PWSID ND0900166) 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 Casselton serve?
City of Casselton reports serving 2,513 people through 575 service connections in Cass County, North Dakota.
Where does City of Casselton 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 Casselton have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in April 2012. 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 Casselton'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 3 violations for this system; none is health-based, and the most recent began in April 2012. 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 Casselton's water quality report?
As a community water system, City of Casselton 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 Cass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fargo City of | Cass | 120,762 | Community | Surface water |
| West Fargo City of | Cass | 34,858 | Community | Purchased surface water |
| Cass Rural Water District Fargo | Cass | 4,242 | Community | Purchased surface water |
| Cass Rural Water District-Phase I | Cass | 3,658 | Community | Groundwater |
| Cass Rural Water District-Phase Ii | Cass | 1,700 | Community | Groundwater |
| Cass Rural Water District-Phase Iii | Cass | 1,682 | 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, “Casselton City of, PWSID ND0900166, North Dakota”, https://aquacensus.com/water-systems/north-dakota/casselton-city-of-nd0900166 (data as of October 1, 2026).