I don’t know the situation in the UK but some countries have separate drains depending on if it’s waste water or just a regular rain water drainage. Rain water drainages are often not treated in any way (because why, it’s rainwater anyway) but waste water is processed in treatment plants.
There is not. Obviously I can’t speak for every city in the world but any I’m familiar with either flow back to natural water sources, or to storm ponds to slowly evaporate/become ground water
I don’t know the situation in the UK but some countries have separate drains depending on if it’s waste water or just a regular rain water drainage. Rain water drainages are often not treated in any way (because why, it’s rainwater anyway) but waste water is processed in treatment plants.
It’s not just rainwater once it’s made it’s way from the streets and into the gutter though… i would hope there’s some sort of treatment
There is not. Obviously I can’t speak for every city in the world but any I’m familiar with either flow back to natural water sources, or to storm ponds to slowly evaporate/become ground water