Fairfield, CA Water Quality Report

Is Fairfield tap water safe? See PFAS and lead contamination levels for Fairfield, California. Compare to EPA limits and get filter recommendations.

Quick Answers

Is Fairfield tap water safe to drink? Fairfield public water systems are not reported as having detected PFAS in the most recent EPA UCMR5 testing cycle. Smaller systems may not be required to test, so private wells and older infrastructure still warrant caution.

What contaminants are in Fairfield water? EPA UCMR5 tests 29 PFAS compounds plus 42+ regulated contaminants (lead, arsenic, nitrate, disinfection byproducts). The detailed table below shows every detection with comparison to EPA limits.

What filter should I use in Fairfield? Reverse osmosis removes 90%+ of PFAS, lead, and arsenic. NSF-53 certified pitcher and faucet filters (ZeroWater, Clearly Filtered, LifeStraw) work for smaller households. Skip standard Brita filters for PFAS removal.

Fairfield Water Quality Summary

Fairfield water systems are not currently reported as having detected PFAS in recent EPA UCMR5 testing. This does not guarantee zero contamination – monitoring is ongoing and smaller systems may not be required to test. Check your specific ZIP code for the most detailed data.

Contamination Level: NONE – No PFAS detected in recent testing.

Lead in Fairfield Water

EPA Lead and Copper Rule testing has recorded 19 lead samples for Fairfield water systems, with a 90th-percentile high of 0.01075 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.

EPA Violations in Fairfield

Fairfield public water systems have 13 health-based EPA Safe Drinking Water Act violations on record, including Surface Water Treatment Rule, Haloacetic Acids (HAA5), Gross Alpha (excl. radon & uranium), Lead. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.

About the Data

These figures come from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR5) testing program, 2023-2025. UCMR5 is the most comprehensive national drinking water survey in US history, covering 66,000+ public water systems. Population of Fairfield: approximately 121,271.

ZIP Codes Served

94533, 94534, 94585

What Fairfield Residents Should Do

  1. Enter your exact ZIP code at knowyourexposure.com for address-level data
  2. Install an NSF/ANSI 58 reverse osmosis filter (removes 94-99% of PFAS)
  3. If you're in a high-exposure group (pregnant, young children), consider a PFAS home test kit
  4. Review your utility's Consumer Confidence Report (CCR) annually