Utility records
Municipal utility bills or property records can indicate sanitary sewer service.
Permit records
Building and onsite-wastewater files may show the system type and date.
Physical clues
Cleanouts, lids and a field area can be clues but are not proof that the system is active.
When uncertain
Ask the municipality or responsible authority to confirm the parcel’s current service status.
Property-specific rule: septic approvals, filings, permits and qualified-person requirements differ across Canada. Use the province and city-area guides to reach the correct official starting point.
Before you act
Keep the system location, approval records and service history together. For purchases, failures or renovations, use a qualified onsite professional appropriate to your province and the scope of work.