Submit the Septic System Decommissioning Form

Complete and submit the Septic System Decommissioning Form along with payment to the Ottawa Septic System Office at least five days prior to starting work.

Locate the Septic Tank

Locate the septic tank and uncover the top of the tank (generally 12–24 inches below ground level). Do not enter the tank.

Note: If you are unsure of the location of your system check your septic records or conduct a Septic System Record Search to obtain a copy.

Pump Tank Out

Have the septic tank wastewater (liquid and sludge) pumped out by a licensed septic hauler. It is important to pump the wastewater, as it contains bacteria and viruses that could make you or your family ill. Keep the pumping receipt as it acts as proof-of-pumping and will be required prior to Ottawa Septic System Office inspection as part of the approval process.

Fill or Crush the Septic Tank

Fill in the septic tank completely with sand or gravel and put the access lid(s) back in place, or demolish the tank and fill in with soil.

Request an Inspection

Request an inspection by fax, email or calling the Ottawa Septic System Office. Please include your name, the address of the decommissioning and file number. An inspection will take place within 48 hours.

OSSO Performs Inspection

OSSO will perform an inspection within 48 hours

Backfill the Septic Tank

Once you receive paperwork approving the decommissioning of your septic tank, backfill the soil around the septic tank slightly higher than ground level to allow for settling.