Among statins, only simvastatin (up to 7.5 ng/L) and pravastatin (up to 40.4 ng/L) were identified in the raw water being these concentrations substantially higher than those found in the literature, 1 ng/L for pravastatin (Miao and Metcalfe, 2003) and 1.4 ng/L for atorvastatin and 1.0 ng/L for its metabolites o- and p-hydroxy atorvastatin in surface waters (Benotti et al., 2009).
Source: wiktionary