KPIX CBS 5 Eyewitness News At 6PM December 22, 2010
some locations? buy did not expect it to find in this many locations. this is a nationwide problem. >> reporter: santa clara valley water district official contented environmental working group's study isn't scientific because only one sample was taken from san jose and they are not sure where it came from. >> our laboratory has been monitoring our drinking water from our treatment plants since 2001 and we have not had a detection of chromium vi. >> reporter: he says he hopes the report will lead to regulations for the chemical. >> we at water agencies were not health experts, public...