Public water system · OR4100165
ActiveCanyon City Water Department
At a glance
Canyon City Water Department (PWSID OR4100165) is an active community water system in Grant County, Oregon. It reports serving 666 people through 317 service connections. Its primary water source is groundwater under influence of surface water, 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 December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
666
Service connections
317
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does Canyon City Water Department compare with other water systems in Grant County?
By EPA's size categories, Canyon City Water Department is a small system (501 to 3,300 people). Grant County has 15 active public water systems, and Canyon City Water Department is the 3rd-largest of them by population served. Its population served is about twice the county average of 339 people per system, and accounts for 13% of the 5,090 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active community water system reports serving 6,703 people, so Canyon City Water Department 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. Oregon has 940 active community water systems, 37% of the state's 2,536 active systems. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 21 Oregon systems (0.8%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Canyon City Water Department?
EPA lists Canyon City Water Department as owned by a local government. The OR 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 15 active systems in Grant County (53%) are also owned by a local government.
Does Canyon City Water Department have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2025. The violations listed here began between October 2023 and December 2025. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Surface Water Treatment Rule (7 of them). EPA lists 8 as resolved and 4 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 |
|---|---|---|---|---|
| 2025-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Long Term 2 Enhanced Surface Water Treatment Rulecode 0800 | No | Archived |
| 2025-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Long Term 2 Enhanced Surface Water Treatment Rulecode 0800 | No | Archived |
| 2024-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Long Term 2 Enhanced Surface Water Treatment Rulecode 0800 | No | Archived |
| 2023-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Long Term 2 Enhanced Surface Water Treatment Rulecode 0800 | No | Archived |
| 2023-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2023-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | 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.
Canyon City Water Department: frequently asked questions
Who runs Canyon City Water Department?
Canyon City Water Department (PWSID OR4100165) is a community water system owned by a local government. It is regulated by the OR state drinking water program.
How many people does Canyon City Water Department serve?
Canyon City Water Department reports serving 666 people through 317 service connections in Grant County, Oregon.
Where does Canyon City Water Department get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Canyon City Water Department 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 December 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 Canyon City Water Department'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 December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OR state drinking water program.
Where can I find Canyon City Water Department's water quality report?
As a community water system, Canyon City Water Department 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 Grant County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| John Day, City of | Grant | 1,617 | Community | Groundwater |
| Prairie City | Grant | 841 | Community | Groundwater under influence of surface water |
| Mount Vernon, City of | Grant | 510 | Community | Groundwater |
| Oprd Clyde Holliday Wayside | Grant | 450 | Transient non-community | Groundwater |
| Seneca, City of | Grant | 200 | Community | Groundwater |
| Long Creek, City of | Grant | 173 | 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, “Canyon City Water Department, PWSID OR4100165, Oregon”, https://aquacensus.com/water-systems/oregon/canyon-city-water-department-or4100165 (data as of October 1, 2026).