Chandler City Of
Chandler, Arizona · PWSID: AZ0407090
Chandler Water Quality Summary
Chandler City Of supplies drinking water to about 247,328 people in Chandler, Arizona, and draws from surface water (rivers, lakes, or reservoirs), which requires fuller treatment for runoff, sediment, and microbial risk. On the IsWaterSafe scale it earns a poor Water Safety Score of 64 out of 100 (Grade D), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 1 health-based violation for this system. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 77 enforcement actions on file in response.
Among the 8 substances sampled, Total Trihalomethanes is the clearest concern: a reading of 0.085 mg/l against an EPA limit (MCL) of 80 ppb, about 106% of the legal ceiling, sampled April 2019. In total, 1 contaminant exceedance is recorded for this system.
The most recent documented episode is a health-based violation involving PFOS/PFOA (PFAS), beginning July 2017 and marked resolved January 2019.
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Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| Nitrate | 5 ppm | 10 ppm | Within Limit | Jan 1, 2017 |
| PFOS/PFOA (PFAS) | 2 ppt | 4 ppt | Within Limit | Jul 1, 2017 |
| Gross Alpha | 7.5 pCi/L | 15 pCi/L | Within Limit | Jul 1, 2017 |
| Uranium | 15 ppb | 30 ppb | Within Limit | Jul 1, 2017 |
| Gross Beta | 25 pCi/L | 50 pCi/L | Within Limit | Jul 1, 2017 |
| Trichloroethylene | 2.5 ppb | 5 ppb | Within Limit | Jul 1, 2017 |
| Total Trihalomethanes | 0.085 mg/l | 80 mg/l | Exceeds Limit | Apr 1, 2019 |
| Arsenic | 5 ppb | 10 ppb | Within Limit | Apr 1, 2023 |
Violation History
Frequently Asked Questions
Chandler City Of has a Water Safety Score of D (64/100). The system serves 247,328 people and has 1 health violation on record. Check the contaminant table above for specific detected substances.
Chandler City Of has 1 contaminant exceedance above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into 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 (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.