Diomede Joint Utilities

PWSID: AK2340141

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3 active violations (non-health-based)
This system has unresolved violations related to monitoring, reporting, or procedural requirements, but none involve contaminant levels exceeding EPA health limits.

This system has more violations on record than 99% of water systems in Alaska.

Violation trend: 108.8 per year over the last 5 years, up from 63.6 per year in the previous 5.

System Details

Population Served	83
Service Connections	4
Water Source	Surface Water
System Type	Community Water System
Owner	Native American
Status	Active
City	Diomide
EPA ZIP on File	99762

Areas Served

Little Diomede, Nome Census Area

Lead & Copper Testing

Contaminant	Level	EPA Action Level	Status
Copper (90th percentile)	4.1000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	3.6000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	3.6000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	3.2000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	2.5000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	1.9000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	1.5000 mg/L	1.300 mg/L	Exceeds Action Level
Copper (90th percentile)	1.4000 mg/L	1.300 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0206 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0136 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0136 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0114 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0100 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0077 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0060 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0029 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0016 mg/L	0.015 mg/L	Below Action Level

3 Active Violations

Contaminant	Violation	Date	Status
5000	MR	2025-07-01	Open
5000	MR	2025-05-19	Open
5000	MR	2025-03-19	Open

Violation History (1021 total)

Contaminant	Violation	Date	Health-Based	Status
0999	MR	2025-09-01	Major	Acknowledged
0200	MR	2025-09-01	Major	Acknowledged
8000	MON	2025-09-01	Major	Acknowledged
0300	MR	2025-09-01	Major	Acknowledged
0200	MR	2025-09-01	Major	Acknowledged
0999	MR	2025-08-01	Major	Acknowledged
0200	MR	2025-08-01	Major	Acknowledged
8000	MON	2025-08-01	Major	Acknowledged
0300	MR	2025-08-01	Major	Acknowledged
0999	MR	2025-07-01	Major	Acknowledged
0200	MR	2025-07-01	Major	Acknowledged
8000	MON	2025-07-01	Major	Acknowledged
2950	MR	2025-07-01	Major	Acknowledged
2456	MR	2025-07-01	Major	Acknowledged
0300	MR	2025-07-01	Major	Acknowledged
0300	MR	2025-06-01	Major	Acknowledged
0200	MR	2025-06-01	Major	Acknowledged
0999	MR	2025-05-01	Major	Returned to Compliance
0300	MR	2025-05-01	Major	Acknowledged
0200	MR	2025-05-01	Major	Acknowledged
0300	MR	2025-04-01	Major	Acknowledged
0200	MR	2025-04-01	Major	Acknowledged
2950	MR	2025-04-01	Major	Acknowledged
2456	MR	2025-04-01	Major	Acknowledged
1005	MR	2025-04-01	Major	Acknowledged
1005	MCL Measured: 0.0430 MG/L (limit: 0.0100 MG/L)	2025-04-01	Yes	Acknowledged
0300	MR	2025-03-01	Major	Acknowledged
0300	MR	2025-03-01	Major	Acknowledged
0200	MR	2025-03-01	Major	Acknowledged
0999	MR	2025-02-01	Major	Returned to Compliance
0999	MR	2025-02-01	Major	Returned to Compliance
0300	MR	2025-02-01	Major	Acknowledged
0300	MR	2025-02-01	Major	Acknowledged
0200	MR	2025-02-01	Major	Acknowledged
0200	MR	2025-02-01	Major	Acknowledged
0999	MR	2025-01-01	Major	Returned to Compliance
0999	MR	2025-01-01	Major	Returned to Compliance
0200	MR	2025-01-01	Major	Returned to Compliance
0200	MR	2025-01-01	Major	Returned to Compliance
8000	MON	2025-01-01	Major	Returned to Compliance
8000	MON	2025-01-01	Major	Returned to Compliance
0300	MR	2025-01-01	Major	Acknowledged
0300	MR	2025-01-01	Major	Acknowledged
1005	MCL Measured: 0.0430 MG/L (limit: 0.0100 MG/L)	2025-01-01	Yes	Acknowledged
0300	MR	2024-12-01	Major	Acknowledged
0300	MR	2024-12-01	Major	Acknowledged
0200	MR	2024-12-01	Major	Acknowledged
0200	MR	2024-12-01	Major	Acknowledged
0300	MR	2024-11-01	Major	Acknowledged
0300	MR	2024-11-01	Major	Acknowledged

Showing 50 of 1018 historical violations.

Understanding This Water System's Record

Diomede Joint Utilities is a community water system water system that draws from surface water sources and serves a population of 83 in Diomide, Alaska. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.

What Do These Violations Mean?

Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.

What Should You Do?

Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.