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Plants (including algae) require three macro nutrients to grow: Nitrogen, potassium, and phosphorus. Of these three, phosphorus is the often the "growth-limiting" nutrient. i.e. the local environment may have an abundance of nitrogen and potassium, but algae won't develop unless phosphorus is available too.
Plants (including algae) require three macro nutrients to grow: Nitrogen, potassium, and phosphorus. Of these three, phosphorus is the often the "growth-limiting" nutrient. i.e. the local environment may have an abundance of nitrogen and potassium, but algae won't develop unless phosphorus is available too.
[[Phosphorus]]
[[Phosphorus]]
===Practice-specific Water Quality===
You can find practice-specific water quality results from STEP-associated projects over a 25-year period (1997 - 2021). Additional results will be added to this database on an ongoing basis. Click on any of the LID BMPs below to see how the removal efficiencies of these practices compares to the CWQG requirements for [[Phosphorus]] and [[TSS]]
*[[Bioretention: TSS]]
*[[Bioretention: Total Phosphorus]]
*[[OGS: TSS]]
*[[OGS: Total Phosphorus]]
*[[Permeable pavements: TSS]]
*[[Permeable pavements: Total Phosphorus]]
*[[Infiltration Trench: TSS]]
*[[Infiltration Trench: Total Phosphorus]]
*[[Rainwater Cistern: TSS]]
*[[Rainwater Cistern: Total Phosphorus]]
*[[Green Roof: TSS]]
*[[Green Roof: Total Phosphorus]]
*[[Inlet: TSS]]
*[[Inlet: Total Phosphorus]]
*[[Outlet: TSS]]
*[[Outlet: Total Phosphorus]]
*[[Asphalt: TSS]]
*[[Asphalt: Total Phosphorus]]
<small>'''Note''': The water quality performance data was collected by the Sustainable Technologies Evaluation Program (STEP). '''Disclaimer:''' STEP cannot guarantee the validity of the information found here. While we use reasonable efforts to include accurate and up to date information, we make no guarantees as to the accuracy of the content and assume no liability for an error or omission in the content).</small>
==Heavy metals==
==Heavy metals==
*[https://www.ec.gc.ca/grandslacs-greatlakes/default.asp?lang=En&n=6201FD24-1 Environment Canada on Phosphorus and Excess Algal Growth ]
*[https://www.ec.gc.ca/grandslacs-greatlakes/default.asp?lang=En&n=6201FD24-1 Environment Canada on Phosphorus and Excess Algal Growth ]
*[https://www.ontario.ca/page/lake-simcoe-phosphorus-reduction-strategy Lake Simcoe phosphorus reduction strategy]
*[https://www.ontario.ca/page/lake-simcoe-phosphorus-reduction-strategy Lake Simcoe phosphorus reduction strategy]
*[https://stepapps.shinyapps.io/WQ_Interactive4/ Canadian LID BMP Database]
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