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