Public water system · WY5601236
ActiveAmerican Colloid-Colony West
At a glance
American Colloid-Colony West (PWSID WY5601236) is an active non-transient non-community water system in Crook County, Wyoming. It reports serving 60 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
60
Service connections
5
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does American Colloid-Colony West compare with other water systems in Crook County?
By EPA's size categories, American Colloid-Colony West is a very small system (500 people or fewer). Crook County has 27 active public water systems. Its population served is well below the county average of 328 people per system, and accounts for 0.7% of the 8,854 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so American Colloid-Colony West is well below 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. Wyoming has 91 active non-transient non-community water systems, 12% of the state's 775 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 585 Wyoming systems (75%) list groundwater as their primary source.
Who owns and regulates American Colloid-Colony West?
EPA lists American Colloid-Colony West 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. 16 of the 27 active systems in Crook County (59%) are also privately owned.
Does American Colloid-Colony West have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2021. The violations listed here began between January 2008 and February 2021. By type: 10 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Cyanide (3 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 |
|---|---|---|---|---|
| 2021-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2010-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | 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.
American Colloid-Colony West: frequently asked questions
Who runs American Colloid-Colony West?
American Colloid-Colony West (PWSID WY5601236) is a non-transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does American Colloid-Colony West serve?
American Colloid-Colony West reports serving 60 people through 5 service connections in Crook County, Wyoming.
Where does American Colloid-Colony West 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 American Colloid-Colony West have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2021. 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 American Colloid-Colony West'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, none is health-based, and the most recent began in February 2021. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find American Colloid-Colony West's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. American Colloid-Colony West 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 Crook County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Devils Tower National Monument | Crook | 3,071 | Transient non-community | Groundwater |
| Sundance, City of | Crook | 1,279 | Community | Groundwater |
| Moorcroft, Town of | Crook | 1,009 | Community | Groundwater |
| Devils Tower Koa-Campstool | Crook | 516 | Transient non-community | Groundwater |
| Pine Haven, Town of | Crook | 498 | Community | Groundwater |
| Hulett, Town of | Crook | 420 | 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, “American Colloid-Colony West, PWSID WY5601236, Wyoming”, https://aquacensus.com/water-systems/wyoming/american-colloid-colony-west-wy5601236 (data as of October 1, 2026).