Fairfield
Is Fairfield tap water safe to drink?
Mostly yes — Fairfield scores 84/100. This report aggregates EPA drinking water data across 1 local system in Fairfield. We found 8 total violations (5 unresolved).
Real-Time Environment
Live: 07:00 AM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Fairfield.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Fairfield?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Wondering if Fairfield tap water needs filtering? We break it down.
Baby Formula Safety
Mixing baby formula with Fairfield tap water? Read this first.
Homebuyer's Perspective
If you're house-hunting in Fairfield, water quality belongs on your due-diligence checklist alongside schools and crime data. The high safety score (84/100) 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 Fairfield
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Fairfield.
Frequently Asked Questions
Is Fairfield tap water safe to drink?
Mostly yes — Fairfield scores 84/100.
How many water systems serve Fairfield?
Fairfield is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Fairfield?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Fairfield.
What is the water quality score for Fairfield?
The water quality score for Fairfield is 84 out of 100, based on EPA contaminant data, violation history, and testing results across the 1 system serving the city.
What are the top contaminants in Fairfield?
The top contaminants detected in Fairfield include Lead (90th percentile). View detailed information on our contaminants page.
Fairfield Water Quality Summary
Fairfield, CA receives a water quality score of 84/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Fairfield'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.
Fairfield's score of 84 is 5 points below the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
For homebuyers considering this mid-size California city, Fairfield's centralized water infrastructure delivers a level of quality that is generally solid and respectable for the West Coast. The local water supply is directly influenced by its geographic position, where the diverse geology of the region meets the runoff challenges from nearby Central Valley agricultural lands and large urban centers. While residents can expect tap water that performs well overall, these environmental and agricultural factors mean that mineral content and other regional characteristics can vary.
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 Fairfield (1)
Check Your Specific Address
Water quality can vary by neighborhood in Fairfield.
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Compare Fairfield water quality: View all states · Contaminant library · How we score water quality