Public water system · WY5600361
ActiveAntelope Butte Ski Area
At a glance
Antelope Butte Ski Area (PWSID WY5600361) is an active transient non-community water system in Big Horn County, Wyoming. It reports serving 527 people through 1 service connection. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
527
Service connections
1
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Antelope Butte Ski Area compare with other water systems in Big Horn County?
By EPA's size categories, Antelope Butte Ski Area is a small system (501 to 3,300 people). Big Horn County has 28 active public water systems. Its population served is about 42% above the county average of 371 people per system, and accounts for 5.1% of the 10,387 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Antelope Butte Ski Area is about 3.7 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. Wyoming has 352 active transient non-community water systems, 45% of the state's 775 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 50 Wyoming systems (6.5%) list surface water as their primary source.
Who owns and regulates Antelope Butte Ski Area?
EPA lists Antelope Butte Ski Area as privately owned. The WY 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 28 active systems in Big Horn County (32%) are also privately owned.
Does Antelope Butte Ski Area have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2025. The violations listed here began between January 2004 and June 2025. By type: 8 monitoring and reporting, 3 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (5 of them). EPA lists 11 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-02-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2024-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-02-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Antelope Butte Ski Area: frequently asked questions
Who runs Antelope Butte Ski Area?
Antelope Butte Ski Area (PWSID WY5600361) is a transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Antelope Butte Ski Area serve?
Antelope Butte Ski Area reports serving 527 people through 1 service connection in Big Horn County, Wyoming.
Where does Antelope Butte Ski Area 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 Antelope Butte Ski Area 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 June 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 Antelope Butte Ski Area'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 June 2025. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Antelope Butte Ski Area's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Antelope Butte Ski Area 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 Big Horn County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lovell, Town of | Big Horn | 2,250 | Community | Purchased surface water |
| Greybull, Town of | Big Horn | 2,080 | Community | Groundwater |
| Basin, Town of | Big Horn | 1,250 | Community | Purchased groundwater |
| South Big Horn County Jpb | Big Horn | 900 | Community | Groundwater |
| Cowley, Town of | Big Horn | 800 | Community | Groundwater |
| Byron, Town of | Big Horn | 561 | Community | Purchased 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, “Antelope Butte Ski Area, PWSID WY5600361, Wyoming”, https://aquacensus.com/water-systems/wyoming/antelope-butte-ski-area-wy5600361 (data as of October 1, 2026).