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→Catchments
*The [https://www.ontario.ca/laws/regulation/120332 Ontario Building Code (OBC)] regulates the use of harvested rainwater as one of many non-potable water sources. <em>"Rainwater means storm sewage runoff that is collected from a roof or the ground, but not from accessible patios and driveways."</em>
*The [https://www.ontario.ca/laws/regulation/120332 Ontario Building Code (OBC)] regulates the use of harvested rainwater as one of many non-potable water sources. <em>"Rainwater means storm sewage runoff that is collected from a roof or the ground, but not from accessible patios and driveways."</em>
*The [https://www.csagroup.org/store CSA standard B805-18/ICC805-2018] separates <em>"roof runoff"</em> from all other sources, including landscaped areas and green roofs. Collectively green roofs, landscaped and paved areas result in <em>"stormwater runoff."</em>
*The [https://www.csagroup.org/store CSA standard B805-18/ICC805-2018] separates <em>"roof runoff"</em> from all other sources, including landscaped areas and green roofs. Collectively green roofs, landscaped and paved areas result in <em>"stormwater runoff."</em>
The current disparity between these two definitions affects all vegetated landscapes including green roofs. Confusion over terminology and regulation has been identified as a significant barrier to implementation of RWH since 2010[http://www.ryerson.ca/content/dam/water/education%20and%20outreach/GreenInfraTO/Identifying%20Barriers%20to%20Widespread%20Implementation%20of%20Rainwater%20Harvesting%20for%20Urban%20Household%20Use%20in%20Ontario.pdf].
The current disparity between these two definitions affects all vegetated landscapes including green roofs. Confusion over terminology and regulation has been identified as a significant barrier to implementation of RWH since 2010 <ref> Leidl, C., Farahbakhsh, K., FitzGibbon, J. 2010. Identifying Barriers to Widespread Implementation of Rainwater Harvesting for Urban Household Use in Ontario. Canadian Water Resources Journal. Vol. 35 (1): 93-104. https://www.tandfonline.com/doi/pdf/10.4296/cwrj3501093].
===Cistern and Pipework===
===Cistern and Pipework===