Public water system · WY5600797
ActiveArng-Camp Guernsey Cantonment
At a glance
Arng-Camp Guernsey Cantonment (PWSID WY5600797) is an active non-transient non-community water system in Platte County, Wyoming. It reports serving 2,000 people through 107 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 April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,000
Service connections
107
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Arng-Camp Guernsey Cantonment compare with other water systems in Platte County?
By EPA's size categories, Arng-Camp Guernsey Cantonment is a small system (501 to 3,300 people). Platte County has 28 active public water systems, and Arng-Camp Guernsey Cantonment is the 2nd-largest of them by population served. Its population served is about 5.6 times the county average of 357 people per system, and accounts for 20% of the 9,999 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 Arng-Camp Guernsey Cantonment is about 4.7 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. 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 Arng-Camp Guernsey Cantonment?
EPA lists Arng-Camp Guernsey Cantonment as owned by the federal government. 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. 1 of the 28 active systems in Platte County (3.6%) are also owned by the federal government.
Does Arng-Camp Guernsey Cantonment have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in April 2025. The violations listed here began between November 2002 and April 2025. By type: 6 monitoring and reporting, 5 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform 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 |
|---|---|---|---|---|
| 2025-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-07-09 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2024-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-11-01 | 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.
Arng-Camp Guernsey Cantonment: frequently asked questions
Who runs Arng-Camp Guernsey Cantonment?
Arng-Camp Guernsey Cantonment (PWSID WY5600797) is a non-transient non-community water system owned by the federal government. It is regulated by the WY state drinking water program.
How many people does Arng-Camp Guernsey Cantonment serve?
Arng-Camp Guernsey Cantonment reports serving 2,000 people through 107 service connections in Platte County, Wyoming.
Where does Arng-Camp Guernsey Cantonment 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 Arng-Camp Guernsey Cantonment 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 April 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 Arng-Camp Guernsey Cantonment'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 April 2025. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Arng-Camp Guernsey Cantonment's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Arng-Camp Guernsey Cantonment 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 Platte County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wheatland, Town of | Platte | 3,659 | Community | Groundwater |
| Guernsey, Town of | Platte | 1,157 | Community | Groundwater |
| Wy Dot-Dwyer Junction Rest Area | Platte | 650 | Transient non-community | Groundwater |
| Basin Electric Power Co-Op | Platte | 310 | Non-transient non-community | Groundwater |
| Arng-Guernsey Training Camp | Platte | 302 | Transient non-community | Groundwater |
| Glendo, Town of | Platte | 289 | 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, “Arng-Camp Guernsey Cantonment, PWSID WY5600797, Wyoming”, https://aquacensus.com/water-systems/wyoming/arng-camp-guernsey-cantonment-wy5600797 (data as of October 1, 2026).