Oak Harbor, Washington: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 35 community water systems serving 29,612+ residents. See violations, PFAS results, lead test results, and safety grades — free.
Is Oak Harbor Tap Water Safe to Drink?
Oak Harbor has 35 community water systems. 34 of 35 graded systems meet all EPA standards (grade A or B), while 1 has recorded violations. No active health-based violations are currently open. Check individual system reports below for specifics.
Oak Harbor Water Quality Overview
Oak Harbor, Washington is served by 35 community water systems providing water to approximately 29,612 residents. These systems draw from groundwater (33), surface water purchased (2) sources. Oak Harbor water systems have recorded 91 health-based violations in their history, though none are currently active. Including monitoring and reporting violations, there are 530 total violations on record.
Find Your Water System
Search by ZIP code to find your exact water provider and see its full EPA report.
All 35 water systems in Oak Harbor
Looking for water quality data across the whole state? See our full Washington tap water safety report covering Washington’s EPA-regulated water systems.
Oak Harbor Drinking Water: Frequently Asked Questions
Is Oak Harbor, Washington tap water safe to drink?
Oak Harbor has 35 community water systems. 34 of 35 graded systems meet all EPA standards (grade A or B), while 1 has recorded violations. No active health-based violations are currently open. Check individual system reports below for specifics.
How many water utilities serve Oak Harbor, Washington?
35 community water systems serve Oak Harbor, Washington, providing water to approximately 29,612 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Oak Harbor tap water have lead?
Lead in drinking water typically enters from old pipes and fixtures inside homes and buildings, not from the treatment plant. The EPA requires water systems to monitor for lead under the Lead and Copper Rule. Click any water system above to see its most recent 90th-percentile lead test results. Homes built before 1986 are most likely to have lead plumbing components.
What contaminants have been found in Oak Harbor drinking water?
EPA violation records for Oak Harbor water systems are listed on each utility's report page. Common regulated contaminants include disinfection byproducts (TTHMs, HAA5), coliform bacteria, nitrates, and lead. Click any utility above to see its full violation history going back 10 years.
How do I find out which water company serves my address in Oak Harbor?
Enter your Oak Harbor ZIP code in the search box at the top of this page. ClearWater will identify the specific water system serving your area and show you its EPA violation history, lead test results, and an overall safety grade. You can also check your water bill or your utility's annual Consumer Confidence Report (CCR).