Page 2: Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Ammonia
Part I. Overview and Application
It is not considered necessary to establish a health-based guideline for ammonia, based on its low toxicity at concentrations found in drinking water. Levels of ammonia, either naturally present in the source water or added as part of a disinfection strategy, can affect water quality in the distribution system (e.g., nitrification) and should be monitored.