Oak Harbor Water Quality
Washington
The tap water in Oak Harbor, Washington is served by 21 EPA-regulated water systems covering approximately 27,370 people. 81 health-based violations are on record, most recently for 2950 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Oak Harbor, Washington is delivered through 21 EPA-regulated community water systems serving an estimated 27,370 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Oak Harbor shows 81 total violations across all 21 systems, of which 81 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 2950, 1005. 2 TRI-reporting industrial facilities are also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Washington drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| OAK HARBOR CITY OF | 23,767 | 0 | Clean |
| ROLLING HILLS-GLENCAIRN | 872 | 17 | Health |
| NORTH WHIDBEY WATER DISTRICT | 568 | 0 | Clean |
| PENN COVE WATER AND SEWER DISTRICT | 460 | 30 | Health |
| DUGUALLA COMMUNITY INC | 459 | 0 | Clean |
| BAYVIEW ESTATES WATER COMPANY | 227 | 0 | Clean |
| SUNRISE HILLS COMMUNITY W S | 186 | 0 | Clean |
| BON AIR COMMUNITY CLUB INC. | 160 | 0 | Clean |
| WATERLOO ACRES COMMUNITY WATER SYS | 125 | 0 | Clean |
| SCENIC HEIGHTS W A INC | 78 | 0 | Clean |
| HIGHLAND TRACE WATER CO INC | 62 | 0 | Clean |
| FOREST HILLS PARK COMMUNITY | 54 | 0 | Clean |
| BONNIE VIEW WATER | 50 | 34 | Health |
| LYON RD COMMUNITY ASSOCIATION | 50 | 0 | Clean |
| SUBURBAN HILLS COMMUNITY ASSOC | 46 | 0 | Clean |
| WESTVIEW COMMUNITY ASSOCIATION | 43 | 0 | Clean |
| EVERGREEN VALLEY VIEW WATER SYSTEM | 40 | 0 | Clean |
| SAN JUAN ESTATES WATER ASSOCIATION | 36 | 0 | Clean |
| BAYVIEW MEADOWS WATER SYSTEM | 34 | 0 | Clean |
| FARANDA WATER ASSOCIATON | 28 | 0 | Clean |
| FROSTAD FARMS WATER ASSN | 25 | 0 | Clean |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 2950 | 2025-07-01 |
| 2950 | 2025-04-01 |
| 2950 | 2025-01-01 |
| 2950 | 2025-01-01 |
| 2950 | 2025-01-01 |
| 2950 | 2024-10-01 |
| 2950 | 2024-10-01 |
| 2950 | 2024-10-01 |
| 2950 | 2024-07-01 |
| 2950 | 2024-07-01 |
| 2950 | 2024-07-01 |
| 2950 | 2024-07-01 |
| 2950 | 2024-07-01 |
| 2950 | 2024-04-01 |
| 2950 | 2024-04-01 |
| 2950 | 2024-04-01 |
| 2950 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 2950 | 2024-01-01 |
| 2950 | 2024-01-01 |
| 2950 | 2024-01-01 |
| 2950 | 2024-01-01 |
| 2950 | 2024-01-01 |
| 2950 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 2950 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 2950 | 2023-07-01 |
| 2950 | 2023-07-01 |
| 2950 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 2950 | 2023-04-01 |
| 2950 | 2023-04-01 |
| 2950 | 2023-04-01 |
| 2950 | 2023-04-01 |
| 1005 | 2023-04-01 |
| 1005 | 2023-04-01 |
TRI Facilities in Oak Harbor
| Facility | Total Releases |
|---|---|
| US Navy Nas Whidbey Island Ault Field | 77.3K lbs |
| Technical Services Inc | 0 lbs |
Frequently Asked Questions
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How many water violations does Oak Harbor have? ▼
What contaminants were found in Oak Harbor water? ▼
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About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.