Drain all stagnant ponds in 15 miles of coastline.
Force all manufacturing that has left California to leave so this is no pollution in California.
If pollution is from human waste, purification or water run offs, eliminate the source. Have the people join the businesses and leave California or all homes now must have an out house and curb side collection of waste.
All white sharks must attend a political correctness class reprogramming them from otters which are protected to tuna which are not as a food source. Eating otters will be a hate crime punishable by fine and prison time.
There that should do it.
You had me, until I read the rest of your post. :-) LOL!
The hallmark of good sarcasm is that it's just close enough to the truth to be believable.