Compost is the most widely used organic component. It's use in bioretention facilities is well established and documented. In Ontario, compost should comply with mandatory Ontario Compost Quality Standards for Category 'AA'.<ref>Ontario Ministry of the Environment and Climate Change (OMOECC). 2012. Ontario Compost Quality
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[[Compost]] is the most widely used organic component. It's use in bioretention facilities is well established and documented. In Ontario, compost should comply with mandatory Ontario Compost Quality Standards for Category 'AA'.<ref>Ontario Ministry of the Environment and Climate Change (OMOECC). 2012. Ontario Compost Quality
Standards, July 25, 2012. PIBS 8412. Queen’s Printer of Ontario, Toronto, ON.
Standards, July 25, 2012. PIBS 8412. Queen’s Printer of Ontario, Toronto, ON.
https://www.ontario.ca/page/ontario-compost-quality-standards.</ref> Compost should also be certified to meet quality parameters recommended under the Compost Council of Canada Compost Quality Alliance (CQA) program.<ref>A & L Canada Laboratories. 2004. Compost Management Program. London, ON.
https://www.ontario.ca/page/ontario-compost-quality-standards.</ref> Compost should also be certified to meet quality parameters recommended under the Compost Council of Canada Compost Quality Alliance (CQA) program.<ref>A & L Canada Laboratories. 2004. Compost Management Program. London, ON.