What are Trihalomethanes (TTHMs)?

Trihalomethanes are a by-product of the disinfection process. They are formed when chlorine breaks down organic material in the water. Research showed that the chloramine disinfection process would slow the formation of total Trihalomethanes. Both Alberta Environment and Parks, and EPCOR approved the utilization of the chloramination disinfection method.

Trihalomethanes present problems over a long period of time. Long term exposure to levels of Trihalomethanes that exceed the maximum contaminant level is a health concern (The 2014 Canadian Drinking Water Quality Guidelines for TTHM limits is 0.1mg/L or 100ug/L). 

The levels of Trihalomethanes fluctuate seasonally.  By utilizing the chloraminated regional water system, we are able to keep the levels of Trihalomethanes low.


Show All Answers

1. UPDATE From the Town of Bonnyville - January 28, 2021
2. UPDATED When will the project be completed?
3. What is the UPDATED total cost of the project and how is it being funded?
4. Will I notice a difference in the water?
5. Why is Chloramine disinfection used?
6. What is a Chloramine disinfection and What are Chloramines?
7. What are Trihalomethanes (TTHMs)?
8. Is Chloraminated water safe to use?
9. Is Chloraminated water safe for my plastic or copper pipes?
10. Is Chloraminated water safe to use for plants, both indoor and outdoor?