Gresham
Is Gresham tap water safe to drink?
Mostly yes — Gresham scores 90/100. This report aggregates EPA drinking water data across 3 local systems in Gresham. We found 84 total violations (13 unresolved).
Real-Time Environment
Live: 04:15 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Gresham.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Gresham?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Wondering if Gresham tap water needs filtering? We break it down.
Baby Formula Safety
Mixing baby formula with Gresham tap water? Read this first.
Homebuyer's Perspective
If you're house-hunting in Gresham, water quality belongs on your due-diligence checklist alongside schools and crime data. The high safety score (90/100) 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 Gresham
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Gresham.
Frequently Asked Questions
Is Gresham tap water safe to drink?
Mostly yes — Gresham scores 90/100.
How many water systems serve Gresham?
Gresham is served by 3 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Gresham?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Gresham.
What is the water quality score for Gresham?
The water quality score for Gresham is 90 out of 100, based on EPA contaminant data, violation history, and testing results across the 3 systems serving the city.
What are the top contaminants in Gresham?
The top contaminants detected in Gresham include Lead (90th percentile). View detailed information on our contaminants page.
Gresham Water Quality Summary
Gresham, OR receives a water quality score of 90/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 3 public water systems serving the area.
Gresham'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.
Gresham's score of 90 is 7 points above the Oregon state average of 83, and above the nationwide average of roughly 78/100 across all U.S. states.
Nestled in Oregon's Pacific Northwest, the mid-size city of Gresham benefits from a regional landscape of forested mountains and coastline that yields generally clean source water. The municipality's tap water is distributed through a trio of local systems to reach residential properties. While prospective homebuyers can feel confident in a solid and reliable water supply, there is still minor room for quality optimization.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Oregon water quality rankings report →
Key Contaminants
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Water Systems Serving Gresham (3)
Check Your Specific Address
Water quality can vary by neighborhood in Gresham.
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