Arizona

852,018,520,285,203 · Colorado River Salt River Project

Mesa, AZ

Moderate Risk Updated March 2026 504,258 residents
73
Purity Score

Contaminant Levels

Lead
2.2 ppb
Nitrate
0.8 mg/L
Arsenic
0.5 mg/L
Fluoride
0.72 mg/L
Copper
0.32 mg/L
Hardness
12.9 gpg

Values shown in respective units

Health Insights

  • 1
    Hard water (12.9 gpg) can cause scale buildup in pipes and appliances but is generally safe to drink.
  • 2
    PFAS data is limited for this utility. Consider testing or precautionary filtration.
  • 3
    Chlorine levels are within EPA limits but may affect taste and smell.

Current Score

73 / 100
Moderate
"Good" threshold (70)

Mesa tap water is sourced from Colorado River Salt River Project and treated by City of Mesa Water Resources. Water hardness is very hard at 12.9 GPG which may cause scale buildup. TDS is 540 ppm which is above the EPA secondary guideline of 500 ppm. Overall purity score: 73/100 (Moderate). Updated for 2026.

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Frequently Asked Questions

Is Mesa AZ tap water safe to drink in 2026?
Mesa tap water meets EPA federal drinking water standards and scores 73/100 (Moderate) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Mesa AZ use chlorine or chloramine for disinfection?
Mesa uses chloramine as the primary disinfectant with a residual level of 1.5 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.
How hard is Mesa AZ water and what is the TDS level?
Mesa water hardness is 12.9 grains per gallon (very hard) with a TDS of 540 ppm (unacceptable). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.
Has PFAS been found in Mesa AZ drinking water?
PFAS testing data for Mesa is incomplete or pending under EPA UCMR5 monitoring. Check your utility CCR report for the latest results. A certified filter provides precautionary protection.

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Data Sources & Methodology

  • EPA Safe Drinking Water Information System (SDWIS)
  • EWG Tap Water Database
  • City of Mesa Water Resources Consumer Confidence Report (CCR)
  • USGS regional water monitoring data

PurityMap compiles publicly available data and does not perform independent testing.

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