I do know treated waste is dumped into the Sacramento River and the thought of that still grosses me out. I will probably just use the Delta waters for day cruising and not fishing, skiing or swimming and restrict my freshwater fishing to clear-running rivers, streams, lakes and reservoirs. The non-navigable shallow rivers of significant current will require waders or expensive jet boats, not prop-driven power boats, for angling. Because I, a flat lander, am prone to altitude sickness, I want to be no higher than 3,000 feet elevation in northern California for outdoor recreation.
I suspect California fishing this coming season will be poor due to the record drought.