I would check with your sewage treatment people. Our community publishes a pamphlet on this as well as recycling, places to take for processing. I agree we have far more dangerous chemicals in our homes than what we do with our photography. How about the chemicals in your garage? Or used outdoors for lawns, gardens, insect control. Realizing what I have and I make a conscious effort to not used chemicals and when I do I'm careful with application quantities and frequency of use. It's how we live in the 21st Century. If we eliminated all chemicals we would have other problems.