Temecula, CA Water Quality Report

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

Quick Answers

Is Temecula tap water safe to drink? Temecula water has high PFAS contamination. EPA UCMR5 testing detected a peak level of 120 ppt, significantly above the EPA's 4 ppt enforceable limit. A reverse osmosis or certified PFAS filter is strongly recommended.

What contaminants are in Temecula water? Top PFAS compounds detected in Temecula water: PFHxS (120 ppt), PFOS (82 ppt), PFOA (53 ppt). See the full table for all monitored contaminants and comparison to EPA limits.

What filter should I use in Temecula? 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.

Temecula Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in Temecula drinking water. Recent monitoring found a peak level of 120 ppt across 4 water systems, representing an average of 12.91 ppt across 9 detected compounds.

Contamination Level: HIGH – High contamination – multiple PFAS compounds detected at levels significantly above EPA safety thresholds.

Top Detected Compounds

  • PFHxS: 120 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFOS: 82 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFOA: 53 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • lithium: 50 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFHpA: 22 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)

Lead in Temecula Water

EPA Lead and Copper Rule testing has recorded 20 lead samples for Temecula water systems, with a 90th-percentile high of 0.0125 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 Temecula

Temecula public water systems have 1 health-based EPA Safe Drinking Water Act violation on record, including Gross Alpha (excl. radon & uranium). 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 Temecula: approximately 113,828.

ZIP Codes Served

92589, 92590, 92591, 92592, 92593

What Temecula 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