Drinking water quality · 2024
· Verified
· PWSID AZ0407090
What's in Chandler, AZ tap water
1 contaminant in Chandler, AZ's water sat at or above a federal limit, led by Bromate at 1.4x the limit.
- !1 contaminant at or above a federal limit — worst is Bromate at 1.4x
- !2 contaminants within 20% of a limit
- !18 of 27 core regulated contaminants reported — 9 never appear in this report
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −18 contaminants at or above a federal limit
- −8 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −2 health-based violations resolved in the last 5 years
- −1 core regulated contaminants never reported (18/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Bromate1.4× the federal limit1.1–14 ug/L · limit 10 ug/L
Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
higher than 95% of U.S. systems
- Arsenic86% of the federal limit8.6 ug/L · limit 10 ug/L
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
higher than 90% of U.S. systems
- TTHM81% of the federal limit65 ug/L · limit 80 ug/L
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
higher than 85% of U.S. systems
+51 contaminants were measured and came in below the limitShow all
What this report doesn't tell you
9 of the 27 contaminants a community water system normally reports do not appear anywhere in Chandler, AZ's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
PFAS — EPA UCMR5 (2023–2025)
4 PFAS compounds detected in Chandler, AZ
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)PFBS
● Detected (no federal limit)PFPeA
● Detected (no federal limit)PFHxA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Chandler, AZ's drinking water comes from ground water, drawn from 33 sources.
Source
- IN-U077900SI
- WL-55-506732 - RURAL WELL
- WL-55-506754 - BROOKS CROSSING WELL
- WL-55-509868 - MONTEREY WELL
- + 29 more
Treatment
- TP001 - SURFACE WATER
- TP005 - CL2
- TP002 - CL2
- + 9 more
Distribution
Also buys water from TEMPE CITY OF.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based8 violations on record · most recent Apr 2019resolved
- Other1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗