As an experiment, I put a 55 gal plastic drum under the down spout on the house gutters. ONE short southern rain shower filled it up. Just FYI.
Just FYI. I built a diverter that would allow the first dozen gallons to bypass before it overflowed into the drum to allow dirt/debris to mainly bypass the drum. However, I have a creek 50 yds away, so I'm in good shape.
Next experiment, outhouse :-)
I use the creek behind my house as an outhouse.
- Your upstream neighbor
I have a pond in the front, so at least I can flush the toilet if we’re without electricity. So, I’m not going to fuss with any outhouse.
Good luck on that, though.