Public water system · ND0300587
ActiveMaddock City of
At a glance
City of Maddock (PWSID ND0300587) is an active community water system in Benson County, North Dakota. It reports serving 382 people through 250 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; all are health-based, and the most recent began in April 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
382
Service connections
250
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Maddock compare with other water systems in Benson County?
By EPA's size categories, City of Maddock is a very small system (500 people or fewer). Benson County has 6 active public water systems, and City of Maddock is the 2nd-largest of them by population served. Its population served is about 49% above the county average of 256 people per system, and accounts for 25% of the 1,538 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 Maddock 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 Maddock?
EPA lists City of Maddock 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. 4 of the 6 active systems in Benson County (67%) are also owned by a local government.
Does City of Maddock have drinking water violations?
EPA's records list 6 violations for this system; all are health-based, and the most recent began in April 2005. The violations listed here began between July 1994 and April 2005. By type: 5 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 6 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2005-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2004-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 1994-07-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
All 6 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 Maddock: frequently asked questions
Who runs City of Maddock?
City of Maddock (PWSID ND0300587) 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 Maddock serve?
City of Maddock reports serving 382 people through 250 service connections in Benson County, North Dakota.
Where does City of Maddock 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 Maddock have any drinking water violations?
EPA's records list 6 violations for this system; all are health-based, and the most recent began in April 2005. 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 Maddock'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 6 violations for this system; all are health-based, and the most recent began in April 2005. 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 Maddock's water quality report?
As a community water system, City of Maddock 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 Benson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Leeds City of | Benson | 427 | Community | Groundwater |
| White Horse Hill Natl Game Preserve | Benson | 300 | Transient non-community | Groundwater |
| Minnewaukan City of | Benson | 224 | Community | Groundwater |
| Oberon City of | Benson | 105 | Community | Groundwater |
| Southend R & R | Benson | 100 | Transient non-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, “Maddock City of, PWSID ND0300587, North Dakota”, https://aquacensus.com/water-systems/north-dakota/maddock-city-of-nd0300587 (data as of October 1, 2026).