'Gaslit': government under fire over algal bloom claims

There are claims the public wasn't warned early enough about the health impacts of an algal bloom. (Matt Turner/AAP PHOTOS)

A government has been accused of "gaslighting" the public over a harmful algal bloom ahead of a state election, sparking calls for an inquiry.

South Australia's opposition says the state government's denials that a harmful algal bloom was toxic have been proven wrong following a revealing report.