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During the 1980s, whole effluent toxicity testing was incorporated into the regulatory control program for municipal and industrial effluents in the USA, as a complement to chemical-specific limitations. While regulating effluent toxicity offered several advantages, it also required the development of means to identify and control sources of toxicity within effluents, which could include toxicants...
A toxicity identification evaluation (TIE) was conducted on effluent from a major industrial discharger. Although initial monitoring typically showed only slight, intermittent, chronic toxicity to Ceriodaphnia dubia, a later sample showed substantial acute toxicity to C. dubia (48-h lc 50 =9%). Acute phase I toxicity characterization tests were conducted on this acutely toxic sample;...
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