Public water system · ND4900482
ActiveHillsboro City of
At a glance
City of Hillsboro (PWSID ND4900482) is an active community water system in Traill County, North Dakota. It reports serving 1,603 people through 400 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,603
Service connections
400
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Hillsboro compare with other water systems in Traill County?
By EPA's size categories, City of Hillsboro is a small system (501 to 3,300 people). Traill County has 5 active public water systems, and City of Hillsboro is the 3rd-largest of them by population served. Its population served is roughly in line with the county average of 1,529 people per system, and accounts for 21% of the 7,644 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 Hillsboro 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 Hillsboro?
EPA lists City of Hillsboro 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 5 active systems in Traill County (80%) are also owned by a local government.
Does City of Hillsboro have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2022. The violations listed here began between November 2006 and July 2022. By type: 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Chlorine, Lead and Copper Rule and Total coliform bacteria (TCR). 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 |
|---|---|---|---|---|
| 2022-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2019-11-20 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2006-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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 Hillsboro: frequently asked questions
Who runs City of Hillsboro?
City of Hillsboro (PWSID ND4900482) 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 Hillsboro serve?
City of Hillsboro reports serving 1,603 people through 400 service connections in Traill County, North Dakota.
Where does City of Hillsboro 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 Hillsboro have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2022. 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 Hillsboro'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; 1 is health-based, and the most recent began in July 2022. 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 Hillsboro's water quality report?
As a community water system, City of Hillsboro 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 Traill County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| East Central Regional Wd-Traill | Traill | 2,800 | Community | Groundwater |
| Mayville City of | Traill | 1,858 | Community | Purchased groundwater |
| Hatton City of | Traill | 777 | Community | Purchased groundwater |
| Portland City of | Traill | 606 | 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, “Hillsboro City of, PWSID ND4900482, North Dakota”, https://aquacensus.com/water-systems/north-dakota/hillsboro-city-of-nd4900482 (data as of October 1, 2026).