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Table 1 Levels and loads of cocaine and its metabolite (benzoylecgonine, BE) in the River Po and WWTPs.

From: Cocaine in surface waters: a new evidence-based tool to monitor community drug abuse

  Levelsa Loads
  Cocaine (ng/liter) BE (ng/liter) Cocaine equivalentsb (g/day)
River Po 1.2 ± 0.2c 25 ± 5c 3800 ± 720c
WWTPs d    
Cagliari 83 640 130
Cuneo 76 420 30
Latina 120 750 33
Varese 42 390 36
  1. aCocaine and BE were analyzed by HPLC-MS/MS
  2. bCocaine loads were estimated from BE concentrations in the waters (see Methods)
  3. cMean ± SD
  4. dWaste water treatment plant locations