According to the United States Centre for Disease Control: “Current studies indicate that using or drinking water with small amounts of monochloramine does not cause harmful health effects and provides protection against waterborne disease outbreaks.”
It is approved by Health Canada, the U.S. Environmental Protection Agency (EPA), and the World Health Organization amongst others. Since the 1930s nearly 100 million North Americans have been enjoying drinking water treated with monochloramine including: Maui, Boston, San Francisco, Portland, Toronto, Ottawa, Washington D.C., Tampa Bay, Pasco, Fort Lauderdale, Waterloo, Edmonton, Saskatoon, Victoria, Abbotsford and Mission, BC.
These studies looked at monochloramine levels of less than 50 milligrams per litre in drinking water. The Canadian standards for monochloramine levels are up to 3 millograms per litre in drinking water and White Rock levels will be around 1 milligrams per litre.