Public water system · AZ0401331
ActiveOutpost Trailer Park
At a glance
Outpost Trailer Park (PWSID AZ0401331) is an active transient non-community water system in Apache County, Arizona. It reports serving 68 people through 34 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
68
Service connections
34
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Outpost Trailer Park compare with other water systems in Apache County?
By EPA's size categories, Outpost Trailer Park is a very small system (500 people or fewer). Apache County has 47 active public water systems. Its population served is well below the county average of 493 people per system, and accounts for 0.3% of the 23,153 people reported by systems filed under the county. Across Arizona, the 1,769 active systems average 4,369 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Outpost Trailer Park is about half of 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. Arizona has 601 active transient non-community water systems, 34% of the state's 1,769 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,612 Arizona systems (91%) list groundwater as their primary source.
Who owns and regulates Outpost Trailer Park?
EPA lists Outpost Trailer Park as under public/private ownership. The AZ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 47 active systems in Apache County (13%) are also under public/private ownership.
Does Outpost Trailer Park have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 2025. The violations listed here began between September 2020 and May 2025. By type: 5 public notice, recordkeeping or other, 3 reporting, 2 monitoring, 1 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (6 of them). EPA lists 10 as resolved and 2 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-05-29 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-04-18 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Unaddressed |
| 2023-05-15 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-05-15 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2021-11-04 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-08-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-07-15 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-07-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-06-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-06-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Outpost Trailer Park: frequently asked questions
Who runs Outpost Trailer Park?
Outpost Trailer Park (PWSID AZ0401331) is a transient non-community water system under public/private ownership. It is regulated by the AZ state drinking water program.
How many people does Outpost Trailer Park serve?
Outpost Trailer Park reports serving 68 people through 34 service connections in Apache County, Arizona.
Where does Outpost Trailer Park 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 Outpost Trailer Park 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 May 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 Outpost Trailer Park'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 May 2025. For current results, consult EPA ECHO, or the AZ state drinking water program.
Where can I find Outpost Trailer Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Outpost Trailer Park 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 Apache County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eagar Town of | Apache | 4,590 | Community | Groundwater |
| St Johns City of | Apache | 3,500 | Community | Groundwater |
| Springerville Town of | Apache | 1,972 | Community | Groundwater |
| Petrified Forest Np | Apache | 1,742 | Community | Purchased groundwater |
| Cedar Grove Water Company | Apache | 1,564 | Community | Groundwater |
| Lord Az Water 2 - Winchester Trails | Apache | 1,304 | 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, “Outpost Trailer Park, PWSID AZ0401331, Arizona”, https://aquacensus.com/water-systems/arizona/outpost-trailer-park-az0401331 (data as of October 1, 2026).