There is a direct correlation between breathing air and dying from cancer. Conversely, no one who has never breathed air has died from cancer.
The bad actor regarding chromium is hexavalent chromium (Cr VI). It is a highly oxidized form of chromium which is also highly reactive. Chromium became a poster child when Erin Brockovich sued Pacific Gas & Electric for contaminating wastewater with Cr VI. Julia Roberts made the case notorious in her depiction of Brockovich and the lawsuit in the film of the same name.
It has since been assumed (erroneously, IMO) that all forms of chromium are carcinogenic. I take 90 micrograms of chromium every day in my multivitamin tablets which is considered to be 76% of my minimum daily requirement. I've been doing so for thirty years.