3. Groups of trace pollutants and ECs
A review of the literature showed that trace pollutants and ECs
receiving the most attention by researchers and regulators
generally belong to one of three broad groups 1) industrials, 2)
pesticides, or 3) pharmaceuticals and personal care products
(PPCPs) (as shown in Tables 1e3). These broad groups are further
subdivided by chemical type, and common uses with occurrence
and toxicity data provided for specific compounds within each subgroup
(Tables 1e3).