Sonora
Is Sonora tap water safe to drink?
Mostly yes — Sonora scores 91/100. This report aggregates EPA drinking water data across 7 local systems in Sonora. We found 110 total violations (26 unresolved).
Real-Time Environment
Live: 02:45 AM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Sonora.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Sonora?
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 Sonora.
Baby Formula Safety
EPA compliance thresholds and pediatric water precautions for Sonora.
Homebuyer's Perspective
Water system history in Sonora informs property maintenance and private filtration requirements. 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 Sonora
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Sonora.
Frequently Asked Questions
Is Sonora tap water safe to drink?
Mostly yes — Sonora scores 91/100.
How many water systems serve Sonora?
Sonora is served by 7 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Sonora?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Sonora.
What is the water quality score for Sonora?
The water quality score for Sonora is 91 out of 100, based on EPA contaminant data, violation history, and testing results across the 7 systems serving the city.
What are the top contaminants in Sonora?
The top contaminants detected in Sonora include Lead (90th percentile). View detailed information on our contaminants page.
Sonora Water Quality Summary
Sonora, CA receives a water quality score of 91/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 7 public water systems serving the area.
Sonora'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.
Sonora's score of 91 is 2 points above the California state average of 89, 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 California water quality rankings report →
Key Contaminants
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Water Systems Serving Sonora (7)
Phoenix Lake Estates Cc Mwc
ASonora Meadows Mutual Wtr Co
BTud - Upper Basin Water System
ATud - Columbia Water System
ATud - Sonora/Jamestown Water System
ATud - Ponderosa
CTud - Tuolumne Water System
ACheck Your Specific Address
Water quality can vary by neighborhood in Sonora.
Related
Quick compare in California
Compare Sonora water quality: View all states · Contaminant library · How we score water quality