I've just been through all this with my water supplier and I tell you what there's some god awful advice out there when it comes to what you can and can't reclaim.
I was lucky enough to be put through to operations and had a lengthy chat with him. He was impressed with my knowledge as normally they don't take calls from the public.
From my supplier you're looking at claiming a 100% waste IF it goes to a soak away in the ground. You can install one with proof of photos but