Mount Vernon, Washington: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 14 community water systems serving 139,220+ residents. See violations, PFAS results, lead test results, and safety grades — free.
EPA data last updated: 2026-06-22
Is Mount Vernon Tap Water Safe to Drink?
Mount Vernon has 14 community water systems. 13 of 14 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.
Mount Vernon Water Quality Overview
Mount Vernon, Washington is served by 14 community water systems providing water to approximately 139,220 residents. These systems draw from groundwater (8), surface water (6) sources. Mount Vernon water systems have recorded 20 health-based violations in their history, though none are currently active. Including monitoring and reporting violations, there are 91 total violations on record.
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All 14 water systems in Mount Vernon
Looking for water quality data across the whole state? See our full Washington tap water safety report covering Washington’s EPA-regulated water systems.
Mount Vernon Drinking Water: Frequently Asked Questions
Is Mount Vernon, Washington tap water safe to drink?
Mount Vernon has 14 community water systems. 13 of 14 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 Mount Vernon, Washington?
14 community water systems serve Mount Vernon, Washington, providing water to approximately 139,220 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Mount Vernon 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 Mount Vernon drinking water?
EPA violation records for Mount Vernon 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 Mount Vernon?
Enter your Mount Vernon 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).