The Mississippi Rideau Septic System Office (MRSSO) is a partnership of the Mississippi Valley and Rideau Valley Conservation Authorities. The MRSSO administers Part 8 (sewage systems) of the Ontario Building Code on behalf of the Tay Valley Township.
The MRSSO 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.
MRSSO - Septic Forms & Fees