Montreal, which was the last major city in North America to begin treating its wastewater, will boost its reputation with the launch of $360 million in wastewater treatment upgrades including work to install an ozone wastewater disinfection process at its J.-R.-Marcotte wastewater treatment plant. Pomerleau was awarded a contract of $93.2-million last March to kick off the ozone project. Work will get underway in phases with various shutdowns required. The plant will remain operational at all times, but its treatment capacity will have to be reduced for two periods of six months, the first from the first day of this November to April 30, 2023.