Fairfield
CA

Is Fairfield, CA Tap Water Safe to Drink?

Fairfield, CA tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Contaminants including lithium have been detected at or below guideline thresholds.

5Water systems
3ZIP codes
0%ZIPs above EPA guideline
Metro areaVallejo, CA
Latest data2025-05-05

Where Does Fairfield Get Its Water?

Water in Fairfield, CA is provided by 5 public water systems: CITY OF FAIRFIELD, CALIFORNIA WATER SERVICE CO.-TRAVIS AFB, CITY OF VALLEJO-LAKES SYSTEM, KOHALA RANCH WATER CO. and SUISUN-SOLANO WATER AUTHORITY.

How Is Fairfield Tap Water Treated?

Treated water is disinfected using free chlorine and ozone. Treatment includes conventional treatment (coagulation, flocculation, and filtration), direct filtration, groundwater disinfection and ion exchange.

What's in Fairfield Tap Water?

The following contaminants were detected most frequently in Fairfield public water systems. All detected levels fall at or below EPA health guidelines in this dataset.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 9 µg/L — 0 ZIPs Within guideline
PFTrDA 0.007 µg/L 0.007 µg/L 1 ZIP Within guideline
6:2 FTS 0.005 µg/L 0.005 µg/L 2 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
PFBA 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Fairfield

Current EPA monitoring data for Fairfield shows contaminant levels within guideline thresholds across all ZIP codes in this dataset. As with all public water systems, sensitive populations may choose to use a certified filter for additional peace of mind.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Fairfield Tap Water

Is Fairfield tap water safe to drink?

Fairfield tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Sensitive populations may still choose to use a certified filter as a precaution.

What contaminants are in Fairfield tap water?

The most commonly detected contaminants in Fairfield water systems include: lithium, PFTrDA, 6:2 FTS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Fairfield get its drinking water?

Fairfield receives water from 5 public water systems, including CITY OF FAIRFIELD.

Do I need a water filter in Fairfield?

Current data does not show guideline exceedances in Fairfield. A certified filter can still reduce trace contaminants and improve taste for households that prefer filtered water.

How often is Fairfield tap water tested?

Public water systems in Fairfield are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-05-05.

Tap water reports by ZIP in Fairfield

Water utilities serving Fairfield, CA

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Also covers / overlaps with