Mount Vernon
Is Mount Vernon tap water safe to drink?
Mostly yes — Mount Vernon scores 91/100. This report aggregates EPA drinking water data across 2 local systems in Mount Vernon. We found 155 total violations (26 unresolved).
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Mount Vernon?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter or no filter for Mount Vernon water? Here's what the data says.
Baby Formula Safety
What new parents in Mount Vernon should know about tap water safety.
Homebuyer's Perspective
Water quality is easy to overlook when evaluating a move to Mount Vernon, but it can affect plumbing longevity and appliance lifespan. The high safety score (91/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Mount Vernon
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Mount Vernon.
Frequently Asked Questions
Is Mount Vernon tap water safe to drink?
Mostly yes — Mount Vernon scores 91/100.
How many water systems serve Mount Vernon?
Mount Vernon is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Mount Vernon?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Mount Vernon.
What is the water quality score for Mount Vernon?
The water quality score for Mount Vernon is 91 out of 100, based on EPA contaminant data, violation history, and testing results across the 2 systems serving the city.
What are the top contaminants in Mount Vernon?
The top contaminants detected in Mount Vernon include Lead (90th percentile). View detailed information on our contaminants page.
Mount Vernon Water Quality Summary
Mount Vernon, WA receives a water quality score of 91/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Mount Vernon's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Mount Vernon's score of 91 is 3 points below the Washington state average of 94, and above the nationwide average of roughly 78/100 across all U.S. states.
Tucked into the Pacific Northwest near forested mountains and the Puget Sound coastline, Mount Vernon benefits from generally clean natural source water. For homebuyers and current residents of this mid-size city, the municipal tap water achieves an excellent overall rating, reflecting robust quality control across the area's multiple water systems. This strong performance means households can confidently rely on their daily water supply for peace of mind.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Washington water quality rankings report →
Key Contaminants
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Water Systems Serving Mount Vernon (2)
Check Your Specific Address
Water quality can vary by neighborhood in Mount Vernon.
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