Gray water, wastewater, cyanobacteria, legionella and other contaminants

This document presents the preventive measures to be applied by employers and workers in drinking water and wastewater treatment plants to protect the health of employees and those who frequent the workplace. These measures apply when sustained community transmission is confirmed by public health authorities.

This notice responds to a request from the ministère de la Santé et des Services sociaux (department of health) of Québec. It is the result of the concerted efforts of two teams within the Institut national de santé publique du Québec (national institute of public health): the “Biohazard, environmental and occupational risks” team wrote the “legionellosis” section, and the “Safety and injury prevention” team wrote the “scalding” section.

Based on an analysis of the scientific…