Public water system · CO0203023
ActiveArapahoe Park Horsetrack
At a glance
Arapahoe Park Horsetrack (PWSID CO0203023) is an active transient non-community water system in Arapahoe County, Colorado. It reports serving 482 people through 35 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
482
Service connections
35
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Arapahoe Park Horsetrack compare with other water systems in Arapahoe County?
By EPA's size categories, Arapahoe Park Horsetrack is a very small system (500 people or fewer). Arapahoe County has 39 active public water systems. Its population served is well below the county average of 22,146 people per system, and accounts for less than 0.1% of the 863,682 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 Arapahoe Park Horsetrack is about 3.3 times 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 Arapahoe Park Horsetrack?
EPA lists Arapahoe Park Horsetrack 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. 22 of the 39 active systems in Arapahoe County (56%) are also privately owned.
Does Arapahoe Park Horsetrack have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2022. The violations listed here began between January 2006 and January 2022. By type: 2 public notice, recordkeeping or other, 1 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2022-01-10 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-09-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-07-11 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 4 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.
Arapahoe Park Horsetrack: frequently asked questions
Who runs Arapahoe Park Horsetrack?
Arapahoe Park Horsetrack (PWSID CO0203023) is a transient non-community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Arapahoe Park Horsetrack serve?
Arapahoe Park Horsetrack reports serving 482 people through 35 service connections in Arapahoe County, Colorado.
Where does Arapahoe Park Horsetrack 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 Arapahoe Park Horsetrack have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 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 Arapahoe Park Horsetrack'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 4 violations for this system; 1 is health-based, and the most recent began in January 2022. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Arapahoe Park Horsetrack's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Arapahoe Park Horsetrack 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 Arapahoe County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aurora City of | Arapahoe | 533,407 | Community | Surface water |
| East Cherry Creek Valley Wsd | Arapahoe | 66,130 | Community | Purchased surface water |
| Englewood City of | Arapahoe | 57,332 | Community | Surface water |
| Southgate Wsd | Arapahoe | 55,000 | Community | Purchased surface water |
| Southwest Metropolitan Wsd | Arapahoe | 48,648 | Community | Purchased surface water |
| Arapahoe Cnty Wwwa | Arapahoe | 31,000 | 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, “Arapahoe Park Horsetrack, PWSID CO0203023, Colorado”, https://aquacensus.com/water-systems/colorado/arapahoe-park-horsetrack-co0203023 (data as of October 1, 2026).