Water Quality: Oak Harbor, WA
21 water systems • 27,370 people served
Multiple Health ViolationsWater Quality Summary
Oak Harbor is served by 21 public water systems with a combined service population of 27,370 people, and has 367 EPA Safe Drinking Water Act violations on record. Critically, 81 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Oak Harbor's violation count is 126% above the national average for Washington. Contaminants associated with violations include Barium, TTHM.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Water Systems Serving Oak Harbor
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| OAK HARBOR CITY OF | WA5362650 | Surface Water | 23,767 | 10 |
| ROLLING HILLS-GLENCAIRN | WA5374000 | Groundwater | 872 | 59 |
| NORTH WHIDBEY WATER DISTRICT | WA5361603 | Surface Water | 568 | 21 |
| PENN COVE WATER AND SEWER DISTRICT | WA5366950 | Groundwater | 460 | 65 |
| DUGUALLA COMMUNITY INC | WA5320250 | Groundwater | 459 | 11 |
| BAYVIEW ESTATES WATER COMPANY | WA5304956 | Groundwater | 227 | 1 |
| SUNRISE HILLS COMMUNITY W S | WA5385818 | Groundwater | 186 | 1 |
| BON AIR COMMUNITY CLUB INC. | WA5307630 | Groundwater | 160 | 0 |
| WATERLOO ACRES COMMUNITY WATER SYS | WA5393580 | Groundwater | 125 | 4 |
| SCENIC HEIGHTS W A INC | WA5376520 | Groundwater | 78 | 10 |
| HIGHLAND TRACE WATER CO INC | WA5332840 | Groundwater | 62 | 2 |
| FOREST HILLS PARK COMMUNITY | WA5309871 | Groundwater | 54 | 8 |
| BONNIE VIEW WATER | WA5307700 | Groundwater | 50 | 121 |
| LYON RD COMMUNITY ASSOCIATION | WA5314026 | Groundwater | 50 | 7 |
| SUBURBAN HILLS COMMUNITY ASSOC | WA5337911 | Groundwater | 46 | 8 |
| WESTVIEW COMMUNITY ASSOCIATION | WA5395375 | Groundwater | 43 | 15 |
| EVERGREEN VALLEY VIEW WATER SYSTEM | WA5324170 | Groundwater | 40 | 3 |
| SAN JUAN ESTATES WATER ASSOCIATION | WA5318605 | Groundwater | 36 | 1 |
| BAYVIEW MEADOWS WATER SYSTEM | WA5327849 | Groundwater | 34 | 16 |
| FARANDA WATER ASSOCIATON | WA5324643 | Groundwater | 28 | 4 |
| FROSTAD FARMS WATER ASSN | WA5326648 | Groundwater | 25 | 0 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Washington
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.