Keywords: toxicity stream pesticides Insecticides Systems: stream Substances: Chlorpyrifos (SBPBAQFWLVIOKP-UHFFFAOYSA-N) Cyfluthrin (OFHFONYRMVKULH-WNYJFNBPSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N)