Mesa, AZ Water Quality
Mesa, AZ has 1 public water system serving 466,000 people. The average Water Safety Score is 75/100 (C). No health violations are on record.
Water Systems in Mesa
Contaminants Detected in Mesa Water
| Contaminant | Systems Detected | Exceeding MCL |
|---|---|---|
| Chlorine | 1 | 0 |
| Combined Radium | 1 | 0 |
| Nitrate | 1 | 0 |
| Gross Alpha | 1 | 0 |
| Uranium | 1 | 0 |
| Gross Beta | 1 | 0 |
| Trichloroethylene | 1 | 0 |
| PFOS/PFOA (PFAS) | 1 | 0 |
| Turbidity | 1 | 0 |
| E. coli | 1 | 0 |
Frequently Asked Questions
Mesa has 1 public water system serving 466,000 people. The average Water Safety Score is 75/100. No health violations are currently on record. Check individual systems below for details.
Mesa water systems have detected 11 contaminants, including Chlorine, Combined Radium, Nitrate. No contaminant exceedances above EPA limits are currently recorded.
The Water Safety Score (0-100, grades A through F) weighs health-based violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Scores are based on EPA SDWIS data from the last 10 years.
Request your utility's Consumer Confidence Report (CCR), consider an independent water test from a certified lab, and look into NSF-certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System. City data aggregates all public water systems serving the municipality.
this entity is one of the data points covered by this site’s U.S. public drinking-water safety dataset. The detail above comes directly from the EPA Safe Drinking Water Information System (SDWIS); the context that follows situates the headline numbers against the broader distribution across U.S. public water systems.
Every number on this page links back to the EPA Safe Drinking Water Information System (SDWIS); the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. public water systems. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: EPA Ground Water and Drinking Water, 2026.