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British Columbia onsite wastewater

British Columbia: know the system, the records and the authority.

A province-level starting point for owners, buyers and renovators, plus 23 city-area guides that keep the sewer-versus-onsite question front and centre.

Regulatory starting point

BC Sewerage System Regulation

British Columbia’s Sewerage System Regulation requires an authorized person to plan, construct or supervise most onsite sewerage-system work covered by the regulation, with filings made to the health authority before construction and certification after completion.

What the provincial framework changes

British Columbia’s Sewerage System Regulation requires an authorized person to plan, construct or supervise most onsite sewerage-system work covered by the regulation, with filings made to the health authority before construction and certification after completion.

The practical result is that a septic decision cannot be separated from the property record. The applicable authority may need a permit, registration, filing, notification, approval or certified professional depending on the province and project.

Three files worth building

System fileDesign, permit/approval or filing, as-built plan, tank and field location.
Maintenance filePumping, service, alarms, repairs and treatment-unit maintenance.
Property fileWater supply, easements, setbacks, lot changes and future construction plans.
Transaction fileInspection findings, seller disclosures and unresolved defects before closing.

Official source

BC Sewerage System Regulation

Reviewed 2026-09-14. Check the local authority for parcel-specific permit and record access.

23 British Columbia city-area guides