COVID-19 Update:

MVCA’s offices are open to the public. The wearing of masks by employees and visitors in MVCA buildings is optional except where two meter physical distancing cannot be maintained.

Please note that the Planning & Regulations department is receiving a higher than normal volume of planning applications and is working as quickly as possible to respond to them all.

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Septic System Office

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The Mississippi Rideau Septic System Office (MRSSO) provides septic system approvals in Tay Valley Township on behalf of the Mississippi Valley and Rideau Valley Conservation Authorities.

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 MRSSO for application information.

Re-Inspection Programs

Voluntary versus Mandatory

In 2012, the decision was made to modify the voluntary septic system re-inspection program to include a discretionary program with mandatory inspections.

The steps taken for the septic re-inspection program are exactly the same for the voluntary and mandatory programs. The only difference is that property owners under the mandatory component will be required to participate in the program when their property has been identified, whereas property owners under the voluntary component can choose whether or not to participate.


The mandatory re-inspection program applies to all properties located on the following:

Water bodies:

  • Adam Lake
  • Bennett Lake
  • Bob’s Lake
  • Farren Lake
  • Long Lake
  • Otty Lake
  • Pike Lake


  • Rideau Lakes
  • Central Frontenac


The voluntary re-inspection program encompasses properties located on over 70 lakes in the following townships:

  • Tay Valley
  • North Frontenac
  • Drummond/North Elmsley