Public water system · CO0202300
ActiveGreat Sand Dunes Hq
At a glance
Great Sand Dunes Hq (PWSID CO0202300) is an active non-transient non-community water system in Alamosa County, Colorado. It reports serving 1,400 people through 16 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,400
Service connections
16
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Great Sand Dunes Hq compare with other water systems in Alamosa County?
By EPA's size categories, Great Sand Dunes Hq is a small system (501 to 3,300 people). Alamosa County has 17 active public water systems, and Great Sand Dunes Hq is the 3rd-largest of them by population served. Its population served is about 46% above the county average of 962 people per system, and accounts for 8.6% 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 non-transient non-community water system reports serving 430 people, so Great Sand Dunes Hq is about 3.3 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Colorado has 183 active non-transient non-community water systems, 8.3% 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 Hq?
EPA lists Great Sand Dunes Hq 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. 2 of the 17 active systems in Alamosa County (12%) are also owned by the federal government.
Does Great Sand Dunes Hq have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2024. The violations listed here began between December 2008 and November 2024. By type: 8 monitoring and reporting, 2 monitoring, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (2 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 |
|---|---|---|---|---|
| 2024-11-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) phthalatecode 2039 | No | Resolved |
| 2021-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-10-23 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2020-07-08 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2019-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2018-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 2008-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Great Sand Dunes Hq: frequently asked questions
Who runs Great Sand Dunes Hq?
Great Sand Dunes Hq (PWSID CO0202300) is a non-transient non-community water system owned by the federal government. It is regulated by the CO state drinking water program.
How many people does Great Sand Dunes Hq serve?
Great Sand Dunes Hq reports serving 1,400 people through 16 service connections in Alamosa County, Colorado.
Where does Great Sand Dunes Hq 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 Hq have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 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 Hq'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, one is health-based, and the most recent began in November 2024. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Great Sand Dunes Hq's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Great Sand Dunes Hq is a non-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 |
| 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 |
| Wagon Wheel MHP | Alamosa | 160 | 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 Hq, PWSID CO0202300, Colorado”, https://aquacensus.com/water-systems/colorado/great-sand-dunes-hq-co0202300 (data as of October 1, 2026).