I found this information in the web page of the water company in my area. Im sorry, its in spanish, well...many things can be understood (i guess)...
how do you find the quality..???
Antimonio µg/l <1
Arsénico µg/l <1
Benceno µg/l <0,1
Benzo(a)pireno µg/l <0,0025
Boro mg/l...