Public water system · ND5300425
ActiveGrenora City of
At a glance
City of Grenora (PWSID ND5300425) is an active community water system in Williams County, North Dakota. It reports serving 244 people through 170 service connections. Its primary water source is 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 October 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
244
Service connections
170
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Grenora compare with other water systems in Williams County?
By EPA's size categories, City of Grenora is a very small system (500 people or fewer). Williams County has 19 active public water systems. Its population served is well below the county average of 1,990 people per system, and accounts for 0.6% of the 37,806 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 Grenora 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 Grenora?
EPA lists City of Grenora 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. 8 of the 19 active systems in Williams County (42%) are also owned by a local government.
Does City of Grenora have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2020. The violations listed here began between July 2008 and October 2020. By type: 8 monitoring and reporting and 4 monitoring. The contaminant or rule involved most often is Chlorine (5 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2020-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2019-12-02 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2012-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
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 Grenora: frequently asked questions
Who runs City of Grenora?
City of Grenora (PWSID ND5300425) 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 Grenora serve?
City of Grenora reports serving 244 people through 170 service connections in Williams County, North Dakota.
Where does City of Grenora 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 Grenora 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 October 2020. 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 Grenora'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 October 2020. 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 Grenora's water quality report?
As a community water system, City of Grenora 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 Williams County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Williston City of | Williams | 26,426 | Community | Surface water |
| Northwest Rural Water District | Williams | 5,102 | Community | Purchased surface water |
| Tioga City of | Williams | 2,202 | Community | Purchased surface water |
| R & T Water System | Williams | 1,003 | Community | Purchased surface water |
| Ray City of | Williams | 950 | Community | Purchased surface water |
| Trenton Water Users Assoc | Williams | 840 | Community | Purchased surface water |
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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, “Grenora City of, PWSID ND5300425, North Dakota”, https://aquacensus.com/water-systems/north-dakota/grenora-city-of-nd5300425 (data as of October 1, 2026).