Public water system · CO0130321
ActiveGreen Mountain Wsd
At a glance
Green Mountain Wsd (PWSID CO0130321) is an active community water system in Jefferson County, Colorado. It reports serving 49,400 people through 11,286 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in June 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
49,400
Service connections
11,286
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Green Mountain Wsd compare with other water systems in Jefferson County?
By EPA's size categories, Green Mountain Wsd is a large system (10,001 to 100,000 people). Jefferson County has 112 active public water systems, and Green Mountain Wsd is the 3rd-largest of them by population served. Its population served is about 9.6 times the county average of 5,159 people per system, and accounts for 8.5% 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 community water system reports serving 6,703 people, so Green Mountain Wsd is about 7.4 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Colorado has 1,068 active community water systems, 48% of the state's 2,207 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 337 Colorado systems (15%) list purchased surface water as their primary source.
Who owns and regulates Green Mountain Wsd?
EPA lists Green Mountain Wsd as owned by a local government. 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. 39 of the 112 active systems in Jefferson County (35%) are also owned by a local government.
Does Green Mountain Wsd have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in June 2021. The violations listed here began between February 2017 and June 2021. By type: 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminants or rules involved are Public Notice and Stage 1 Disinfectants and Disinfection Byproducts Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2021-06-17 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2017-02-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
All 2 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.
Green Mountain Wsd: frequently asked questions
Who runs Green Mountain Wsd?
Green Mountain Wsd (PWSID CO0130321) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does Green Mountain Wsd serve?
Green Mountain Wsd reports serving 49,400 people through 11,286 service connections in Jefferson County, Colorado.
Where does Green Mountain Wsd get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Green Mountain Wsd have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in June 2021. 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 Green Mountain Wsd'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 2 violations for this system; 1 is health-based, and the most recent began in June 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find Green Mountain Wsd's water quality report?
As a community water system, Green Mountain Wsd must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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 |
| 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 |
| Wheat Ridge Water District | Jefferson | 20,000 | 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, “Green Mountain Wsd, PWSID CO0130321, Colorado”, https://aquacensus.com/water-systems/colorado/green-mountain-wsd-co0130321 (data as of October 1, 2026).