What's in the Water in Chandler, AZ?
Monitoring data for Chandler, Arizona shows 8 distinct contaminants detected in the public water supply — Total Trihalomethanes, Nitrate, PFOS/PFOA (PFAS), Gross Alpha, Uranium, and others. Of these, 1 exceeded the EPA Maximum Contaminant Level.
Contaminants Detected in Chandler
| Contaminant | Detected | EPA Limit (MCL) | Status |
|---|---|---|---|
| Total Trihalomethanes | 0.085 mg/l | 80 mg/l | Exceeds limit |
| Nitrate | 5 ppm | 10 ppm | Within limit |
| PFOS/PFOA (PFAS) | 2 ppt | 4 ppt | Within limit |
| Gross Alpha | 7.5 pCi/L | 15 pCi/L | Within limit |
| Uranium | 15 ppb | 30 ppb | Within limit |
| Gross Beta | 25 pCi/L | 50 pCi/L | Within limit |
| Trichloroethylene | 2.5 ppb | 5 ppb | Within limit |
| Arsenic | 5 ppb | 10 ppb | Within limit |
Detected levels are the highest reported across Chandler systems for each contaminant. MCL = EPA Maximum Contaminant Level, the legal safety ceiling. Source: EPA SDWIS monitoring data.
Safety & Violations
| Metric | Value |
|---|---|
| Average Safety Score | 64/100 (D worst) |
| Public Water Systems | 1 |
| Population Served | 247,328 |
| Health Violations | 1 |
| Monitoring Violations | 0 |
| Contaminant Exceedances | 1 |
| Enforcement Actions | 77 |
Frequently Asked Questions
Monitoring data for Chandler, Arizona shows 8 distinct contaminants detected in the public water supply — Total Trihalomethanes, Nitrate, PFOS/PFOA (PFAS), Gross Alpha, Uranium, and others. Of these, 1 exceeded the EPA Maximum Contaminant Level.
The 1 public water system serving Chandler, Arizona (population 247,328) average a Water Safety Score of 64/100, with a worst grade of D. These systems have 1 health-based violation and 1 contaminant exceedance on record.
Chandler, Arizona is served by 1 public water system, together supplying water to roughly 247,328 people. The worst safety grade among them is D.
Yes. 1 contaminant exceeded the EPA Maximum Contaminant Level (MCL) in Chandler: Total Trihalomethanes. An exceedance means a detected level was higher than the legal safety limit at least once during monitoring.
The Water Safety Score (0-100, graded A-F) weighs health-based violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%), using EPA Safe Drinking Water Information System (SDWIS) data from the last 10 years.
Request your utility's annual Consumer Confidence Report (CCR), consider an independent test from a state-certified lab, and use an NSF-certified filter targeting any contaminant of concern. For lead specifically, run cold water 30 seconds before drinking.
More about Chandler
Monitoring data for Chandler, Arizona shows 8 distinct contaminants detected in the public water supply — Total Trihalomethanes, Nitrate, PFOS/PFOA (PFAS), Gross Alpha, Uranium, and others. Of these, 1 exceeded the EPA Maximum Contaminant Level.
This answer pulls from the EPA Safe Drinking Water Information System (SDWIS), the authoritative federal source for U.S. public drinking-water safety. The headline number above is the direct answer; what follows is the additional context most readers need to use the answer for a real decision rather than just a fact lookup.
For readers turning this answer into action: cross-reference against the underlying the EPA Safe Drinking Water Information System (SDWIS) record before acting on time-sensitive decisions. The site renders the data as it was published; subsequent revisions can shift the picture, and the live federal data is always the authoritative current reference.
Source: EPA Ground Water and Drinking Water, 2026.