Oh, that. If you read the article, you’ll see that the “toxic waste” was really just used water from the deluge system. Think of it like rinsing off your car and the runoff getting into a river. A good chunk of the water was collected too, so the actual discharge was much less. On top of that, it was later clarified that SpaceX could continue the operations while the permit process was sorted out, which happened a few months after that article IIRC. It was basically a nothingburger that a few commentators tried to blow up.