Public water system · AZ0414082
ActiveUsmc Yuma Main System
At a glance
Usmc Yuma Main System (PWSID AZ0414082) is an active community water system in Yuma County, Arizona. It reports serving 8,353 people through 1,000 service connections. Its primary water source is surface water, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,353
Service connections
1,000
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Usmc Yuma Main System compare with other water systems in Yuma County?
By EPA's size categories, Usmc Yuma Main System is a medium system (3,301 to 10,000 people). Yuma County has 50 active public water systems, and Usmc Yuma Main System is the 5th-largest of them by population served. Its population served is about twice the county average of 4,392 people per system, and accounts for 3.8% of the 219,583 people reported by systems filed under the county. Across Arizona, the 1,769 active systems average 4,369 people each. Nationally, the average active community water system reports serving 6,703 people, so Usmc Yuma Main System is about 25% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Arizona has 936 active community water systems, 53% of the state's 1,769 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 61 Arizona systems (3.4%) list surface water as their primary source.
Who owns and regulates Usmc Yuma Main System?
EPA lists Usmc Yuma Main System as owned by the federal government. 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 50 active systems in Yuma County (12%) are also owned by the federal government.
Does Usmc Yuma Main System have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2025. The violations listed here began between January 2023 and October 2025. By type: 7 monitoring and reporting, 2 reporting, 2 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (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 |
|---|---|---|---|---|
| 2025-10-02 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2025-07-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-04-01 | Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2025-03-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-06-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2024-05-12 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2024-05-12 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | 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.
Usmc Yuma Main System: frequently asked questions
Who runs Usmc Yuma Main System?
Usmc Yuma Main System (PWSID AZ0414082) is a community water system owned by the federal government. It is regulated by the AZ state drinking water program.
How many people does Usmc Yuma Main System serve?
Usmc Yuma Main System reports serving 8,353 people through 1,000 service connections in Yuma County, Arizona.
Where does Usmc Yuma Main System 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 Usmc Yuma Main System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 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 Usmc Yuma Main System'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, 2 are health-based, and the most recent began in October 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the AZ state drinking water program.
Where can I find Usmc Yuma Main System's water quality report?
As a community water system, Usmc Yuma Main System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Yuma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Yuma | Yuma | 103,264 | Community | Surface water |
| San Luis City of | Yuma | 39,705 | Community | Groundwater |
| Foothills Water and Sewer LLC | Yuma | 32,425 | Community | Surface water |
| Somerton City of | Yuma | 14,197 | Community | Groundwater |
| Aspc Yuma | Yuma | 4,197 | Community | Groundwater |
| Wellton Town of | Yuma | 3,000 | Community | 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, “Usmc Yuma Main System, PWSID AZ0414082, Arizona”, https://aquacensus.com/water-systems/arizona/usmc-yuma-main-system-az0414082 (data as of October 1, 2026).