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The USEPA Clean Water Act (CWA) requires national approval for all methods used for CWA compliance. There are approved methods for the determination of inorganic nitrogen (NO3-N, NO2-N, and NH3-N), and for organic nitrogen (TKN – NH3-N)2. There are no EPA approved methods for the determination of total nitrogen although it is a required parameter in many USEPA permits, including monitoring ...
The spatial and temporal variations in the concentrations of nutrients (NH4+, NO2−, PO43−, SiO4−) and chlorophyll a were monitored simultaneously in a slow-flowing watercourse (Saricay Stream, ...
Since 2010, the U.S. alone has spent over $1.1B to combat the effects of nutrient pollution in its waterways — including eutrophication, harmful algal blooms, and hypoxia.[1] The lack of simple-to-use, affordable technology for nutrient ...
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