Mesa, AZ Water Quality Report

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

Quick Answers

Is Mesa tap water safe to drink? Mesa water has high PFAS contamination. EPA UCMR5 testing detected a peak level of 525 ppt, significantly above the EPA's 4 ppt enforceable limit. A reverse osmosis or certified PFAS filter is strongly recommended.

What contaminants are in Mesa water? Top PFAS compounds detected in Mesa water: lithium (525 ppt), PFBS (0.01 ppt), PFHxS (0.01 ppt). See the full table for all monitored contaminants and comparison to EPA limits.

What filter should I use in Mesa? 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.

Mesa Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in Mesa drinking water. Recent monitoring found a peak level of 525 ppt across 1 water system, representing an average of 117.03 ppt across 4 detected compounds.

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

Top Detected Compounds

  • lithium: 525 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFBS: 0.01 ppt
  • PFHxS: 0.01 ppt
  • PFHxA: 0 ppt

Lead in Mesa Water

EPA Lead and Copper Rule testing has recorded 3 lead samples for Mesa water systems, with a 90th-percentile high of 0.00501 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.

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 Mesa: approximately 504,258.

ZIP Codes Served

85201, 85202, 85203, 85204, 85205

Compare Mesa to Other Cities

Side-by-side PFAS contamination comparisons with same-state, regional, and national peers.

What Mesa 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