For what it's worth, not all of these areas are totally unsafe. I am familiar with some of the central valley lakes that are highlighted and I grabbed the current consumption flyer for one: https://oehha.ca.gov/media/downloads/advisories/millertonlak...

The situation is not great but it's not quite so bad as it might seem if you look at that map and think it indicates only areas where fish are completely unsafe to eat.