Under the Clean Water Act (CWA), water pollutants not listed as conventional pollutants, toxic pollutants, or thermal discharges. These include chloride, iron, ammonia, color, and total phenols.
NONCONVENTIONAL POLLUTANTS
Meaning of NONCONVENTIONAL POLLUTANTS in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012