Guidelines for Canadian Drinking Water Quality: Guideline Technical Document - Haloacetic Acids

1.0 Guideline

The maximum acceptable concentration (MAC) for total haloacetic acids* in drinking water is 0.08 mg/L (80 µg/L) based on a locational running annual average of a minimum of quarterly samples taken in the distribution system.

Utilities should make every effort to maintain concentrations as low as reasonably achievable (or ALARA) without compromising the effectiveness of disinfection.