Composting Toilets

Background Information

In areas where water supply is constrained, composting toilets can be a cost-effective, environmentally friendly addition to conventional on-site septic systems. The use of composting toilets in BC is supported by the Manual of Composting Toilet and Greywater Practice, which was introduced in 2016. The Manual provides a comprehensive set of provisions that support the design, installation and maintenance of composting toilet-based sewerage systems, and aligns with the Sewerage System Regulation (SSR), Environmental Management Act, Municipal Wastewater Regulation and BC Building Code. A composting toilet system can now be filed as part of a SSR filing with the local health authority.

The Manual introduces new standards for the management of composting toilet residual organic matter, and identifies three options to manage composting toilet residuals: off-site discharge; on-site burial; and on-site surface application. Monitoring and processing requirements specified in the Manual now make it more challenging for homeowners with composting toilets to discharge organic residuals on-site. 

Further information on composting toilets in BC can be found in the Composting Toilet and Greywater Guidelines document from the Canadian Onsite Technical Resource Association.

Frequently Asked Questions

Below are some questions and answers about composting toilets. If you have any further questions please email us.