Public water system · CO0230192
ActiveYellow Barn Limited
At a glance
Yellow Barn Limited (PWSID CO0230192) is an active non-transient non-community water system in Jefferson County, Colorado. It reports serving 75 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in October 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
75
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Yellow Barn Limited compare with other water systems in Jefferson County?
By EPA's size categories, Yellow Barn Limited is a very small system (500 people or fewer). Jefferson County has 112 active public water systems. Its population served is well below the county average of 5,159 people per system, and accounts for less than 0.1% of the 577,783 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 Yellow Barn Limited 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 Yellow Barn Limited?
EPA lists Yellow Barn Limited as privately owned. The CO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 69 of the 112 active systems in Jefferson County (62%) are also privately owned.
Does Yellow Barn Limited have drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in October 2012. The violations listed here began between April 1999 and October 2012. By type: 7 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2012-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2011-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 10 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.
Yellow Barn Limited: frequently asked questions
Who runs Yellow Barn Limited?
Yellow Barn Limited (PWSID CO0230192) is a non-transient non-community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Yellow Barn Limited serve?
Yellow Barn Limited reports serving 75 people through 3 service connections in Jefferson County, Colorado.
Where does Yellow Barn Limited 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 Yellow Barn Limited have any drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in October 2012. 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 Yellow Barn Limited'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 10 violations for this system; 3 are health-based, and the most recent began in October 2012. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Yellow Barn Limited's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Yellow Barn Limited 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.
Other water systems in Jefferson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Arvada City of | Jefferson | 171,610 | Community | Surface water |
| Consolidated Mutual Maple Grove | Jefferson | 81,400 | Community | Surface water |
| Green Mountain Wsd | Jefferson | 49,400 | Community | Purchased surface water |
| Bancroft Clover Wsd | Jefferson | 44,000 | Community | Purchased surface water |
| Golden City of | Jefferson | 38,288 | Community | Surface water |
| Bear Creek Wsd | Jefferson | 30,000 | Community | Purchased surface water |
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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, “Yellow Barn Limited, PWSID CO0230192, Colorado”, https://aquacensus.com/water-systems/colorado/yellow-barn-limited-co0230192 (data as of October 1, 2026).