It goes by health unit.
Regions with a 28-day lockdown
Brant County Health Unit
Chatham-Kent Public Health
City of Hamilton Public Health Services
Durham Region Health Department
Eastern Ontario Health Unit
Grey Bruce Health Unit
Haldimand-Norfolk Health Unit
Haliburton, Kawartha, Pine Ridge District Health Unit
Halton Region Public Health
Hastings Prince Edward Public Health
Huron Perth Public Health
Kingston, Frontenac and Lennox & Addington Public Health
Lambton Public Health
Leeds, Grenville & Lanark District Health Unit
Middlesex-London Health Unit
Niagara Region Public Health
Ottawa Public Health
Peel Public Health
Peterborough Public Health
Region of Waterloo Public Health
Renfrew County and District Health Unit
Simcoe-Muskoka District Health Unit
Southwestern Public Health
Toronto Public Health
Wellington-Dufferin-Guelph Public Health
Windsor-Essex County Health Unit
York Region Public Health
Regions with a 14-day lockdown
Algoma Public Health
North Bay Parry Sound District
Porcupine Health Unit
Public Health Sudbury and Districts
Timiskaming Health Unit
Thunder Bay District Health Unit
Northwestern Health Unit