Public water system · UTAH26020
ActiveMill Hollow Campground
At a glance
Mill Hollow Campground (PWSID UTAH26020) is an active transient non-community water system in Wasatch County, Utah. It reports serving 110 people through 9 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
110
Service connections
9
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mill Hollow Campground compare with other water systems in Wasatch County?
By EPA's size categories, Mill Hollow Campground is a very small system (500 people or fewer). Wasatch County has 58 active public water systems. Its population served is well below the county average of 959 people per system, and accounts for 0.2% of the 55,608 people reported by systems filed under the county. Across Utah, the 1,133 active systems average 3,458 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Mill Hollow Campground is about 24% below 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. Utah has 509 active transient non-community water systems, 45% of the state's 1,133 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 898 Utah systems (79%) list groundwater as their primary source.
Who owns and regulates Mill Hollow Campground?
EPA lists Mill Hollow Campground as owned by the federal government. 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. 8 of the 58 active systems in Wasatch County (14%) are also owned by the federal government.
Does Mill Hollow Campground have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2018. The violations listed here began between July 2007 and August 2018. By type: 5 monitoring and reporting, 4 required treatment not met, 2 monitoring and 1 reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (6 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 |
|---|---|---|---|---|
| 2018-08-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2017-08-02 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-12-15 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2016-09-22 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-05-16 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2015-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2010-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Mill Hollow Campground: frequently asked questions
Who runs Mill Hollow Campground?
Mill Hollow Campground (PWSID UTAH26020) is a transient non-community water system owned by the federal government. It is regulated by the UT state drinking water program.
How many people does Mill Hollow Campground serve?
Mill Hollow Campground reports serving 110 people through 9 service connections in Wasatch County, Utah.
Where does Mill Hollow Campground 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 Mill Hollow Campground have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2018. 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 Mill Hollow Campground'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, 4 are health-based, and the most recent began in August 2018. For current results, consult EPA ECHO, or the UT state drinking water program.
Where can I find Mill Hollow Campground's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mill Hollow Campground 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 Wasatch County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Heber City Water System | Wasatch | 19,000 | Community | Groundwater |
| Midway City Water System | Wasatch | 7,055 | Community | Groundwater |
| Twin Creeks Ssd | Wasatch | 4,640 | Community | Surface water |
| Jordanelle State Park | Wasatch | 3,010 | Transient non-community | Groundwater |
| Jordanelle Ssd | Wasatch | 2,345 | Community | Surface water |
| Timber Lakes Water Ssd | Wasatch | 1,560 | 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, “Mill Hollow Campground, PWSID UTAH26020, Utah”, https://aquacensus.com/water-systems/utah/mill-hollow-campground-utah26020 (data as of October 1, 2026).