Total Trihalomethanes (TTHMs) in Arizona Drinking Water
205 public water systems in Arizona have historical EPA violation records associated with total trihalomethanes (tthms) in the Q2 2026 snapshot.
504
Historical Records in Arizona
205
Systems With Records
About Total Trihalomethanes (TTHMs)
- EPA Limit
- 80 ppb
- Category
- Disinfection Byproducts
- Health Effects
- Liver, kidney, nervous system problems; increased cancer risk
- Common Treatment Approaches
- Activated carbon filters
Arizona Systems With the Most Total Trihalomethanes (TTHMs) Records
SEMINOLE UTILITIES HOLLYWOOD
9,300 served5 historical records
A
SEMINOLE - BRIGHTON RESERVATION
6,538 served5 historical records
A
SEMINOLE - BIG CYPRESS
2,132 served1 historical record
A
CHOCTAW - CONEHATTA
1,201 served1 historical record
A
CHOCTAW - TUCKER
1,114 served1 historical record
A
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.