Fairfield Drinking Water Quality
What's Really in Your Tap Water?
Good news for Fairfield residents — your tap water meets all current EPA drinking water standards. At 183 ppm (10.7 gpg), the water is quite hard — you may notice mineral buildup on fixtures. Lead levels test well below the EPA action level. No violations have been recorded in the past 3 years.
Safe to Drink
Meets all EPA standards
10.7 GPG hardness
Lead
Below EPA action level
EPA action level: 15 ppb
Hardness
Very Hard water
US Average: 100 ppm
Is Fairfield Tap Water Safe to Drink?
Fairfield tap water meets all current EPA drinking water standards.
Lead — Lead (0 ppb) is well below the EPA action level of 15 ppb.
The data below shows test results from 1 water utility serving 120K people in the Fairfield area.
Based on publicly available data from EPA Water Quality Portal (Various). Water quality can vary by location, building plumbing, and over time. This assessment reflects compliance with federal EPA standards and is not medical advice.
Do I Need a Water Filter?
With very hard water (183 ppm), a water softener can reduce scale buildup in pipes, appliances, and water heaters.
How Hard is Fairfield Water?
183 ppm
10.7 grains per gallon
Very hard water causes significant mineral buildup. A water softener is recommended.
Impact on Your Home
Shower
Dries out skin & hair
Kitchen
Heavy mineral deposits
Laundry
Stiff, dingy clothes
Appliances
Significant scale
Regional Comparison
Values in ppm (mg/L as CaCO₃)
Do I Need a Water Softener?
At 183 ppm, Fairfield has very hard water. A water softener can help prevent scale buildup in water heaters, dishwashers, and pipes. According to the Water Quality Research Foundation, hard water can reduce appliance efficiency and increase energy costs. A whole-house water softener or salt-free conditioner can help.
Based on 3 water samples from Solano County
Your pipes tell a different story
The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Fairfield tap water.
Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.
Lead & Contaminants
Understanding lead levels and water quality violations in Fairfield
Lead Test Results
90th Percentile Lead Level
0 ppb
Fairfield lead levels are well below the EPA action level.
Regular testing is still recommended, as lead can enter water through household plumbing.
Last sampled: 2023-12-31
About Lead in Drinking Water
What is Lead in Water?
According to the EPA, lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb and states there is no safe level of lead exposure.
Potential Health Effects
According to the CDC: developmental delays, learning difficulties, lower IQ, behavioral issues
According to the EPA: high blood pressure, kidney damage, reproductive issues
How to Reduce Exposure
- •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
- •Use cold water for cooking and drinking (hot water dissolves more lead)
- •Install a NSF-certified filter designed to remove lead
- •Test your water, especially if your home was built before 1986
EPA Compliance History
Excellent Record
No violations in past 3 yearsThis utility has maintained full EPA compliance. No action needed, but regular home testing is still recommended.
3-Year Violation Summary
0
Total Violations
0
Health-Related
0
Administrative
Health-Related Violations
Contaminant exceeded EPA maximum contaminant levels. The EPA recommends considering certified filtration.
Administrative Violations
Missed testing deadlines or reporting. Does not indicate water quality issues.
Who Provides Fairfield's Water?
Utility Name
CITY OF FAIRFIELD
EPA System ID (PWSID)
CA4810003
Primary Water Source
Surface Water
Population Served
120K
Frequently Asked Questions
Common questions about Fairfield tap water quality
Nearby Cities in California
Los Angeles
Hard water
East Bay
Very Hard water
San Diego
Very Hard water
San Jose
Very Hard water
California
Hard water
Eastern Municipal Wd
Very Hard water
This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology
Data source: EPA Water Quality Portal (environmental samples, not verified tap water)