San Francisco challenged that permit term, arguing (1) it's too vague and (2) EPA can't hold the city responsible for water quality in the ocean, only for the contents of its own discharges

If San Francisco wins, it will have huge consequences. This permit language is included in thousands of other permits across the country and is an important backstop in cases where the permitting agency doesn't know about or can't craft specific limits for every single pollutant in the discharge