Public water system · CO0202600
ActiveGreat Sand Dunes Oasis
At a glance
Great Sand Dunes Oasis (PWSID CO0202600) is an active transient non-community water system in Alamosa County, Colorado. It reports serving 33 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
33
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Great Sand Dunes Oasis compare with other water systems in Alamosa County?
By EPA's size categories, Great Sand Dunes Oasis is a very small system (500 people or fewer). Alamosa County has 17 active public water systems. Its population served is well below the county average of 962 people per system, and accounts for 0.2% of the 16,356 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 Great Sand Dunes Oasis is well 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 Great Sand Dunes Oasis?
EPA lists Great Sand Dunes Oasis 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. 11 of the 17 active systems in Alamosa County (65%) are also privately owned.
Does Great Sand Dunes Oasis have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between April 2014 and July 2024. By type: 2 reporting and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2024-07-11 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-07-10 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 3 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.
Great Sand Dunes Oasis: frequently asked questions
Who runs Great Sand Dunes Oasis?
Great Sand Dunes Oasis (PWSID CO0202600) is a transient non-community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Great Sand Dunes Oasis serve?
Great Sand Dunes Oasis reports serving 33 people through 4 service connections in Alamosa County, Colorado.
Where does Great Sand Dunes Oasis 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 Great Sand Dunes Oasis have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. 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 Great Sand Dunes Oasis' 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 3 violations for this system; none is health-based, and the most recent began in July 2024. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Great Sand Dunes Oasis' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Great Sand Dunes Oasis 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 Alamosa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Alamosa City of | Alamosa | 11,271 | Community | Groundwater |
| East Alamosa | Alamosa | 1,453 | Community | Purchased groundwater |
| Great Sand Dunes Hq | Alamosa | 1,400 | Non-transient non-community | Groundwater |
| Ramble Cg | Alamosa | 601 | Transient non-community | Groundwater |
| Sangre De Cristo Lane Seven School | Alamosa | 445 | Non-transient non-community | Groundwater |
| Great Sand Dunes Pinon Flats Cg | Alamosa | 250 | 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, “Great Sand Dunes Oasis, PWSID CO0202600, Colorado”, https://aquacensus.com/water-systems/colorado/great-sand-dunes-oasis-co0202600 (data as of October 1, 2026).