Total Trihalomethanes (TTHMs) in Montana Drinking Water
146 public water systems in Montana have historical EPA violation records associated with total trihalomethanes (tthms) in the Q2 2026 snapshot.
480
Historical Records in Montana
146
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
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.