Ottawa Septic System Office

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. 

For more information, visit the Ottawa Septic System Office


Contact information:

phone: 613-692-3571 or 1-800-267-3504
fax: 613-692-0831

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

Contact Us

Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

613-692-3571, 1-800-267-3504



Regular Hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.

Member of: conservation ontario