Katy
Is Katy tap water safe to drink?
Mostly yes — Katy scores 98/100. This report aggregates EPA drinking water data across 6 local systems in Katy. We found 138 total violations (5 unresolved).
Real-Time Environment
Live: 09:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Katy.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Katy?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Should you buy a water purifier in Katy? See our analysis.
Baby Formula Safety
Is Katy tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Katy, water quality is a key factor in long-term property maintenance. The high safety score (98/100) 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 Katy
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Katy.
Frequently Asked Questions
Is Katy tap water safe to drink?
Mostly yes — Katy scores 98/100.
How many water systems serve Katy?
Katy is served by 6 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Katy?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Katy.
What is the water quality score for Katy?
The water quality score for Katy is 98 out of 100, based on EPA contaminant data, violation history, and testing results across the 6 systems serving the city.
What are the top contaminants in Katy?
The top contaminants detected in Katy include Lead (90th percentile). View detailed information on our contaminants page.
Katy Water Quality Summary
Katy, TX receives a water quality score of 98/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 6 public water systems serving the area.
Katy'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.
Katy's score of 98 is 22 points above the Texas state average of 76, and above the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Texas water quality rankings report →
Key Contaminants
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Water Systems Serving Katy (6)
Fort Bend County Mud 5
AKaty Isd Mayde Creek School Complex
ALancaster Mud 1
ACity Of Katy
AMason Creek Utility District
AMontgomery County Mud 137
ACheck Your Specific Address
Water quality can vary by neighborhood in Katy.
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Quick compare in Texas
Compare Katy water quality: View all states · Contaminant library · How we score water quality