Frederick
Is Frederick tap water safe to drink?
Mostly yes — Frederick scores 95/100. This report aggregates EPA drinking water data across 8 local systems in Frederick. We found 176 total violations (15 unresolved).
Real-Time Environment
Live: 04:15 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Frederick.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Frederick?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Wondering if Frederick tap water needs filtering? We break it down.
Baby Formula Safety
Mixing baby formula with Frederick tap water? Read this first.
Homebuyer's Perspective
If you're house-hunting in Frederick, water quality belongs on your due-diligence checklist alongside schools and crime data. 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 Frederick
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Frederick.
Frequently Asked Questions
Is Frederick tap water safe to drink?
Mostly yes — Frederick scores 95/100.
How many water systems serve Frederick?
Frederick is served by 8 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Frederick?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Frederick.
What is the water quality score for Frederick?
The water quality score for Frederick is 95 out of 100, based on EPA contaminant data, violation history, and testing results across the 8 systems serving the city.
What are the top contaminants in Frederick?
The top contaminants detected in Frederick include Lead (90th percentile). View detailed information on our contaminants page.
Frederick Water Quality Summary
Frederick, MD receives a water quality score of 95/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 8 public water systems serving the area.
Frederick'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.
Frederick's score of 95 is 5 points above the Maryland state average of 90, and above the nationwide average of roughly 78/100 across all U.S. states.
Homeowners and prospective buyers in this Mid-Atlantic mid-size city can take comfort in the outstanding quality of their local tap water. Situated in the dense Baltimore/DC urban corridor and the environmentally sensitive Chesapeake Bay coastal region, the area's multiple supply systems consistently deliver clean, well-managed water. This track record of excellent performance across the local distribution network ensures that Frederick residents enjoy highly reliable and safe drinking water for their daily household needs.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Maryland water quality rankings report →
Key Contaminants
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Water Systems Serving Frederick (8)
Linganore High School
ACity Of Frederick
AFountaindale South
AWaterside
ASam Hill Estates
AKnolls Of Windsor
AFort Detrick
BNew Design - Frederick County
BCheck Your Specific Address
Water quality can vary by neighborhood in Frederick.
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Quick compare in Maryland
Compare Frederick water quality: View all states · Contaminant library · How we score water quality