Substances: fipronil (ZOCSXAVNDGMNBV-UHFFFAOYSA-N) clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N) diuron (XMTQQYYKAHVGBJ-UHFFFAOYSA-N) benzotriazole (QRUDEWIWKLJBPS-UHFFFAOYSA-N) Keywords: pharmaceutical sewer overflows monitoring