Delaware
Is Delaware tap water safe to drink?
Mostly yes — Delaware scores 95/100. This report aggregates EPA drinking water data across 2 local systems in Delaware. We found 129 total violations (5 unresolved).
Real-Time Environment
Live: 10:15 AM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Delaware.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Delaware?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Evaluation of municipal compliance and household filtration options in Delaware.
Baby Formula Safety
EPA compliance thresholds and pediatric water precautions for Delaware.
Homebuyer's Perspective
Water system history in Delaware informs property maintenance and private filtration requirements. The high safety score (95/100) 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 Delaware
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Delaware.
Frequently Asked Questions
Is Delaware tap water safe to drink?
Mostly yes — Delaware scores 95/100.
How many water systems serve Delaware?
Delaware is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Delaware?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Delaware.
What is the water quality score for Delaware?
The water quality score for Delaware is 95 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 Delaware?
The top contaminants detected in Delaware include Lead (90th percentile). View detailed information on our contaminants page.
Delaware Water Quality Summary
Delaware, OH receives a water quality score of 95/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Delaware'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.
Delaware's score of 95 is 11 points above the Ohio state average of 84, and above the nationwide average of roughly 78/100 across all U.S. states.
For families and prospective homebuyers looking at this mid-size city in Ohio, the local drinking water stands out as exceptionally clean, offering reassurance in a region of the Midwestern industrial Rust Belt. The municipal supply, distributed through a couple of local water systems, consistently meets top-tier safety and quality benchmarks. This reliable access to excellent tap water makes Delaware an appealing option for those prioritizing environmental standards in a community situated near the Great Lakes coastline.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Ohio water quality rankings report →
Key Contaminants
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Water Systems Serving Delaware (2)
Check Your Specific Address
Water quality can vary by neighborhood in Delaware.
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Quick compare in Ohio
Compare Delaware water quality: View all states · Contaminant library · How we score water quality