Public water system · CO0230550
ActiveMt Evans Outdoor Lab
At a glance
Mt Evans Outdoor Lab (PWSID CO0230550) is an active transient non-community water system in Jefferson County, Colorado. It reports serving 172 people through 13 service connections. 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 May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
172
Service connections
13
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mt Evans Outdoor Lab compare with other water systems in Jefferson County?
By EPA's size categories, Mt Evans Outdoor Lab 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 transient non-community water system reports serving 144 people, so Mt Evans Outdoor Lab is about 20% 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. Colorado has 956 active transient non-community water systems, 43% 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 Mt Evans Outdoor Lab?
EPA lists Mt Evans Outdoor Lab 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 Mt Evans Outdoor Lab have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in May 2025. By type: 1 public notice, recordkeeping or other. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2025-05-08 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
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.
Mt Evans Outdoor Lab: frequently asked questions
Who runs Mt Evans Outdoor Lab?
Mt Evans Outdoor Lab (PWSID CO0230550) is a transient non-community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Mt Evans Outdoor Lab serve?
Mt Evans Outdoor Lab reports serving 172 people through 13 service connections in Jefferson County, Colorado.
Where does Mt Evans Outdoor Lab 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 Mt Evans Outdoor Lab 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 May 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 Mt Evans Outdoor Lab'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 May 2025. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Mt Evans Outdoor Lab's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt Evans Outdoor Lab 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 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, “Mt Evans Outdoor Lab, PWSID CO0230550, Colorado”, https://aquacensus.com/water-systems/colorado/mt-evans-outdoor-lab-co0230550 (data as of October 1, 2026).