Substances: Fenvalerat (NYPJDWWKZLNGGM-UHFFFAOYSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N) Systems: stream Keywords: stream pyrethroids