Public water system · CO0346116
ActiveAmphitheater Cg
At a glance
Amphitheater Cg (PWSID CO0346116) is an active transient non-community water system in Ouray County, Colorado. It reports serving 92 people through 14 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
92
Service connections
14
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Amphitheater Cg compare with other water systems in Ouray County?
By EPA's size categories, Amphitheater Cg is a very small system (500 people or fewer). Ouray County has 9 active public water systems. Its population served is well below the county average of 538 people per system, and accounts for 1.9% of the 4,840 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 Amphitheater Cg is about 36% below 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 Amphitheater Cg?
EPA lists Amphitheater Cg as owned by the federal 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. 1 of the 9 active systems in Ouray County (11%) are also owned by the federal government.
Does Amphitheater Cg have drinking water violations?
EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in May 2025. The violations listed here began between January 1993 and May 2025. By type: 7 monitoring and reporting, 1 reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 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 |
|---|---|---|---|---|
| 2025-05-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2017-06-11 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-08-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | 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.
Amphitheater Cg: frequently asked questions
Who runs Amphitheater Cg?
Amphitheater Cg (PWSID CO0346116) is a transient non-community water system owned by the federal government. It is regulated by the CO state drinking water program.
How many people does Amphitheater Cg serve?
Amphitheater Cg reports serving 92 people through 14 service connections in Ouray County, Colorado.
Where does Amphitheater Cg 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 Amphitheater Cg have any drinking water violations?
EPA's records list 10 violations for this system; 2 are 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 Amphitheater Cg'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; 2 are 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 Amphitheater Cg's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Amphitheater Cg 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 Ouray County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ouray City of | Ouray | 1,460 | Community | Groundwater under influence of surface water |
| Dallas Creek Wc | Ouray | 1,059 | Community | Surface water |
| Ridgway Town of | Ouray | 1,000 | Community | Surface water |
| Mountaintop Retreat Ofbc Inc. | Ouray | 587 | Transient non-community | Groundwater |
| Elk Mountain Resort | Ouray | 268 | Transient non-community | Groundwater |
| Elk Meadows Estates | Ouray | 230 | Community | Groundwater under influence of 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, “Amphitheater Cg, PWSID CO0346116, Colorado”, https://aquacensus.com/water-systems/colorado/amphitheater-cg-co0346116 (data as of October 1, 2026).