Table 2 Local use of cocaine in the River Po basin and medium-size Italian cities, as estimated from BE levels in waters

River Po

0.70 ± 0.13^c

7.0 ± 1.3^c

2.7 ± 0.5^c

27 ± 5^c

WWTPs ^d

Cagliari

0.47

4.7

1.7

17

Cuneo

0.21

2.1

0.9

9

Latina

0.73

7.4

2.6

26

Varese

0.32

3.2

1.4

14

0.44 ± 0.23^c

4.4 ± 2.3^c

1.7 ± 0.7^c

17 ± 7^c