Public water system · UTAH03123
ActiveGreenfield Milling
At a glance
Greenfield Milling (PWSID UTAH03123) is an active non-transient non-community water system in Cache County, Colorado. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Greenfield Milling compare with other water systems in Cache County?
By EPA's size categories, Greenfield Milling is a very small system (500 people or fewer). Cache County has 1 active public water system, and Greenfield Milling is the largest of them by population served. Its population served is roughly in line with the county average of 25 people per system, and accounts for 100% of the 25 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Greenfield Milling is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Colorado has 183 active non-transient non-community water systems, 8.3% of the state's 2,207 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,437 Colorado systems (65%) list groundwater as their primary source.
Who owns and regulates Greenfield Milling?
EPA lists Greenfield Milling 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 Cache County (100%) are also privately owned.
Does Greenfield Milling have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2025. By type: 1 monitoring. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 as archived. 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 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
The one violation in EPA's records.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.
Greenfield Milling: frequently asked questions
Who runs Greenfield Milling?
Greenfield Milling (PWSID UTAH03123) is a non-transient non-community water system privately owned. It is regulated by the UT state drinking water program.
How many people does Greenfield Milling serve?
Greenfield Milling reports serving 25 people through 1 service connection in Cache County, Colorado.
Where does Greenfield Milling 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 Greenfield Milling have any drinking water violations?
EPA's records list one violation for this system; it is not 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 Greenfield Milling'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 one violation for this system; it is not health-based, and the most recent began in December 2025. For current results, consult EPA ECHO, or the UT state drinking water program.
Where can I find Greenfield Milling's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Greenfield Milling is a non-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, “Greenfield Milling, PWSID UTAH03123, Colorado”, https://aquacensus.com/water-systems/colorado/greenfield-milling-utah03123 (data as of October 1, 2026).