Public water system · OR4194134
ActiveNps John Day Nm/Clarno
At a glance
Nps John Day Nm/Clarno (PWSID OR4194134) is an active transient non-community water system in Wheeler County, Oregon. It reports serving 70 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in April 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
70
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Nps John Day Nm/Clarno compare with other water systems in Wheeler County?
By EPA's size categories, Nps John Day Nm/Clarno is a very small system (500 people or fewer). Wheeler County has 5 active public water systems, and Nps John Day Nm/Clarno is the 5th-largest of them by population served. Its population served is about 63% below the county average of 188 people per system, and accounts for 7.4% of the 942 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Nps John Day Nm/Clarno is about half of that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Oregon has 1,250 active transient non-community water systems, 49% of the state's 2,536 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,175 Oregon systems (86%) list groundwater as their primary source.
Who owns and regulates Nps John Day Nm/Clarno?
EPA lists Nps John Day Nm/Clarno as owned by the federal 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. 2 of the 5 active systems in Wheeler County (40%) are also owned by the federal government.
Does Nps John Day Nm/Clarno have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in April 2021. The violations listed here began between July 1992 and April 2021. By type: 5 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2021-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1992-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Nps John Day Nm/Clarno: frequently asked questions
Who runs Nps John Day Nm/Clarno?
Nps John Day Nm/Clarno (PWSID OR4194134) is a transient non-community water system owned by the federal government. It is regulated by the OR state drinking water program.
How many people does Nps John Day Nm/Clarno serve?
Nps John Day Nm/Clarno reports serving 70 people through 2 service connections in Wheeler County, Oregon.
Where does Nps John Day Nm/Clarno 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 Nps John Day Nm/Clarno have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in April 2021. 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 Nps John Day Nm/Clarno'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 7 violations for this system; none is health-based, and the most recent began in April 2021. For current results, consult EPA ECHO, or the OR state drinking water program.
Where can I find Nps John Day Nm/Clarno's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Nps John Day Nm/Clarno is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Wheeler County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fossil, City of | Wheeler | 470 | Community | Groundwater |
| Spray, City of | Wheeler | 139 | Community | Groundwater |
| Mitchell, City of | Wheeler | 138 | Community | Groundwater |
| Nps John Day Nm/Painted Hills | Wheeler | 125 | 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, “Nps John Day Nm/Clarno, PWSID OR4194134, Oregon”, https://aquacensus.com/water-systems/oregon/nps-john-day-nm-clarno-or4194134 (data as of October 1, 2026).