Public water system · UTAH27107
ActiveZion Under Canvas
At a glance
Zion Under Canvas (PWSID UTAH27107) is an active transient non-community water system in Washington County, Montana. It reports serving 165 people through 52 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
165
Service connections
52
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Zion Under Canvas compare with other water systems in Washington County?
By EPA's size categories, Zion Under Canvas is a very small system (500 people or fewer). Washington County has 1 active public water system, and Zion Under Canvas is the largest of them by population served. Its population served is roughly in line with the county average of 165 people per system, and accounts for 100% of the 165 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Zion Under Canvas is about 15% above 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. Montana has 1,206 active transient non-community water systems, 51% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Zion Under Canvas?
EPA lists Zion Under Canvas as privately owned. The UT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 1 active systems in Washington County (100%) are also privately owned.
Does Zion Under Canvas have drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 2025. The violations listed here began between November 2017 and August 2025. By type: 8 monitoring, 2 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (9 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2021-08-03 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2021-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-03-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | E. colicode 3014 | No | Resolved |
| 2018-02-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2018-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
All 11 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.
Zion Under Canvas: frequently asked questions
Who runs Zion Under Canvas?
Zion Under Canvas (PWSID UTAH27107) is a transient non-community water system privately owned. It is regulated by the UT state drinking water program.
How many people does Zion Under Canvas serve?
Zion Under Canvas reports serving 165 people through 52 service connections in Washington County, Montana.
Where does Zion Under Canvas 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 Zion Under Canvas have any drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 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 Zion Under Canvas' 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 11 violations for this system; 1 is health-based, and the most recent began in August 2025. For current results, consult EPA ECHO, or the UT state drinking water program.
Where can I find Zion Under Canvas' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Zion Under Canvas 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.
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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, “Zion Under Canvas, PWSID UTAH27107, Montana”, https://aquacensus.com/water-systems/montana/zion-under-canvas-utah27107 (data as of October 1, 2026).