Public water system · CO0149122
ActiveAspen City of
At a glance
City of Aspen (PWSID CO0149122) is an active community water system in Pitkin County, Colorado. It reports serving 31,100 people through 3,875 service connections. Its primary water source is surface water, 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 March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
31,100
Service connections
3,875
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Aspen compare with other water systems in Pitkin County?
By EPA's size categories, City of Aspen is a large system (10,001 to 100,000 people). Pitkin County has 49 active public water systems, and City of Aspen is the largest of them by population served. Its population served is about 29 times the county average of 1,085 people per system, and accounts for 58% of the 53,175 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 City of Aspen is about 4.6 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 228 Colorado systems (10%) list surface water as their primary source.
Who owns and regulates City of Aspen?
EPA lists City of Aspen 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. 9 of the 49 active systems in Pitkin County (18%) are also owned by a local government.
Does City of Aspen have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2025. The violations listed here began between March 2018 and March 2025. By type: 10 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Surface Water Treatment Rule (5 of them). 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 |
|---|---|---|---|---|
| 2025-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-02-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2022-03-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2022-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2020-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2018-11-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2018-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2018-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2018-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
City of Aspen: frequently asked questions
Who runs City of Aspen?
City of Aspen (PWSID CO0149122) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does City of Aspen serve?
City of Aspen reports serving 31,100 people through 3,875 service connections in Pitkin County, Colorado.
Where does City of Aspen get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Aspen 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 March 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 City of Aspen'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 March 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find City of Aspen's water quality report?
As a community water system, City of Aspen 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 Pitkin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Snowmass Village Wsd | Pitkin | 6,353 | Community | Surface water |
| Aspen Ski Corp Hi Alpine L9 | Pitkin | 2,900 | Transient non-community | Surface water |
| Aspen Ski Corp Garrett Gulch | Pitkin | 2,630 | Transient non-community | Surface water |
| Aspen Ski Co Sundeck | Pitkin | 1,801 | Transient non-community | Groundwater under influence of surface water |
| Aspen Ski Corp Elk Camp | Pitkin | 1,380 | Transient non-community | Surface water |
| Aspen Ski Co Cliff House | Pitkin | 1,002 | Transient non-community | Groundwater |
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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, “Aspen City of, PWSID CO0149122, Colorado”, https://aquacensus.com/water-systems/colorado/aspen-city-of-co0149122 (data as of October 1, 2026).