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And I’ll bet they are washing untreated sewage through their storm drains.

Correct, and SF Mayor London Breed has already started the lying and misdirection campaign, she states:

“To be clear, San Francisco has a combined sewer system, one of the best and most effective in the country, that ensures that all debris that flow into storm drains are filtered out at the city’s wastewater treatment plants, no debris flow out into the bay or the ocean.”

Filtering (which is overwhelmed during heavy rain) does NOT remove or neutralize pathogens, drugs or chemical pollutants, only a proper full treatment of all effluent through a modern sewage treatment facility makes the discharge safe for the Bay, Ocean or waterways.

The critical danger to public health and the environment persists.

That’s funny. I live in a town that is on lake Huron. The EPA mandated that our storm drains and residential sewers be separated at great cost some years ago. The stated reason was to reduce pollution from the storm drains getting into the lake. When atorms hit the system was overwhelmed, resulting in raw sewage being dumped into the lake. San Fran is still sending storm sewage into the bay? How the hell do they get away with that?

If you ever visit San Fran, you've noticed that the "aromas" wafting up from the city street grates stinks like sewage. That's because San Francisco uses a "Combined Sewer," the only coastal city in California to do so. A combined sewer system collects and treats both wastewater and stormwater in the same network of pipes. Water flows through most of the sewers using gravity. Stormwater enters the combined sewer system through building roof drains or the catch basins along the street and gets treated at city plants just like the wastewater that goes down your household drain.

When I first moved to SF in the summer of 1973, the stench arising from city street grates just sickened me. It is so gross.

See San Francisco Water, Power, and Sewer Our Combined Sewer.

Here's a cute little cartoon that shows how innocent and simple this design approach is...in theory:

What it doesn't show is those pedestrians gagging and passing out from the noxious fumes arising from the city street grates.