The Ottawa Septic System Office (OSSO) is a partnership of the Mississippi Valley Conservation Authority, South Nation Conservation and the RVCA. The OSSO administers Part 8 (sewage systems) of the Ontario Building Code on behalf of the City of Ottawa.
The OSSO is responsible for reviewing septic designs and plans, issuing Building Permits for new and replacement sewage systems and inspections for installations to ensure compliance with approvals. Before building or renovating your home or cottage, contact the OSSO for application information.
phone: 613-692-3571 or 1-800-267-3504
Where to find us:
The Ottawa Septic System Office is located at the RVCA's Conservation Centre
Box 599, 3889 Rideau Valley Drive
(at the corner of Rideau Valley Drive and Prince of Wales Drive)
Manotick ON K4M 1A5
8:30 AM to 4:30 PM, Monday to Friday