Nutrient Pollution Monitoring

Articles & Whitepapers

Introducing a New ASTM Method for the Determination of Total Nitrogen, and TKN by Calculation, in Water Samples

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 ...

Monitoring of phytoplankton biomass and nutrients in a polluted stream

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, ...

YSI Delivers Breakthrough Technology to Help Scientists Battle Nutrient Pollution

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 ...