Confirm whether this property is served by municipal sanitary sewer or an onsite system. Use the city-specific municipal connection and records route below, then confirm applicable provincial onsite-wastewater approvals before any work.
Thunder Bay explains that the City maintains the sewer connection from the main to the property line, while property owners are responsible for the connection from the property line to the house. Ask for the property-specific connection and permit record; utility-side maintenance responsibilities do not establish septic eligibility.
A city-area guide cannot tell whether a specific parcel is connected to sewer or has an onsite system.
Use the local authority route below for septic approvals, permits or records. Confirm sewer connection separately with the municipality or utility.
Open local septic / permit page →Find the parcel’s system approvals and verify current rules with the responsible local authority before work.
Start with provincial guidance →Check utility bills and permit records; ask the local authority to confirm current service before planning an onsite inspection or repair.
How to confirm service →Ontario regulates most residential onsite sewage systems under Part 8 of the Building Code. Systems with a daily design flow of 10,000 litres or less are generally administered by a municipality, health unit or conservation authority; larger systems fall under the environmental approval regime.
Confirm the exact Part 8 authority before applying. New systems, replacements, major repairs, additions or changes that increase design flow can require permit review, site/soil information, design calculations and inspections before covering.
