The possible sources for Chromium includes chromeplanting, petroleum refining, electroplanting industry, textile manufacturing, and for Lead – petrol-based materials, and also pesticides and mobile batteries. 

The findings of higher Chromim and Lead and lower Arsenic and Cadmium in the Haifa Bay area fit a pattern of an industrial metropolitan area not as much subjected to traffic-related pollution, as compared to Tel-Aviv area.

These findings have already recieved mass-media attention and led the Knesset to invite Prof' Novack to present the study results. 

Here you can find the links to media coverage of this study.