Public water system · CO0126189
ActiveCrested Butte South
At a glance
Crested Butte South (PWSID CO0126189) is an active community water system in Gunnison County, Colorado. It reports serving 2,000 people through 553 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,000
Service connections
553
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Crested Butte South compare with other water systems in Gunnison County?
By EPA's size categories, Crested Butte South is a small system (501 to 3,300 people). Gunnison County has 71 active public water systems, and Crested Butte South is the 4th-largest of them by population served. Its population served is about 5.2 times the county average of 383 people per system, and accounts for 7.4% of the 27,176 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 Crested Butte South is well below 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. 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 Crested Butte South?
EPA lists Crested Butte South 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. 7 of the 71 active systems in Gunnison County (9.9%) are also owned by a local government.
Does Crested Butte South have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022. The violations listed here began between January 2011 and July 2022. By type: 10 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminants or rules involved are Revised Total Coliform Rule, Consumer Confidence Rule, Beryllium and Chromium. 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 |
|---|---|---|---|---|
| 2022-07-14 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorocyclopentadienecode 2042 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | 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.
Crested Butte South: frequently asked questions
Who runs Crested Butte South?
Crested Butte South (PWSID CO0126189) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does Crested Butte South serve?
Crested Butte South reports serving 2,000 people through 553 service connections in Gunnison County, Colorado.
Where does Crested Butte South 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 Crested Butte South have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022. 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 Crested Butte South'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, none is health-based, and the most recent began in July 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find Crested Butte South's water quality report?
As a community water system, Crested Butte South 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 Gunnison County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gunnison City of | Gunnison | 9,610 | Community | Groundwater |
| Mount Crested Butte Wsd | Gunnison | 3,296 | Community | Surface water |
| Crested Butte Town of | Gunnison | 2,440 | Community | Surface water |
| Cbmr Paradise Warming House | Gunnison | 1,530 | Transient non-community | Groundwater |
| Gunnison County Wsd | Gunnison | 800 | Community | Surface water |
| Evergreen Lake Company | Gunnison | 431 | Community | 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, “Crested Butte South, PWSID CO0126189, Colorado”, https://aquacensus.com/water-systems/colorado/crested-butte-south-co0126189 (data as of October 1, 2026).