Since July, 141 people have contracted the bacteria, nine of whom have died.
The city's building authority will be joining forces with the city's inspection team to sanitize cooling towers in the Quebec's Lower Town, where most of the infections have happened.
Quebec's health agency also teamed up with the social services authority to create an info-line for people call and find out more information about legionnaires' disease. The services are available from 8 a.m. to 8 p.m. at 1-877-644-4545.
Legionnaires' disease is often found in stagnant water that can be found in cooling towers and fountains. The disease cannot be passed on from person to person.