2.3.3. Nutrients
Although phosphorus, ammonium, nitrate, and particulate nitrogen
are not definitive contaminants of wastewater
(Sankararamakrishnan and Guo, 2005), some researchers have
used these markers as indicators of wastewater in stormwater. For
example, Pitt (2004) suggested ammonia as a good indicator of
illicit discharges of wastewater, particularly when ammonianitrogen
concentrations exceed a benchmark value of 0.3 mg/l.