Our washing up bowl is 6l and I used 2 bowls of water to wash the dishes. The first bowl of water I washed up mainly plates, cutlery and a few bowls, mixing bowl and rice cooker. The second bowl I did the stoneware, no soap used for that and I scrape stoneware clean under running water that goes into the washing up bowl.
I always do dishes by hand, though I was more mindful of how much water I used this time. I was surprised by how little it was in the end. The soap used is Palmolive pure and clear, which meets the OECD 301 test for biodegradability.
Measured out 24 cups (1.5 gallons) for the wash water. Brought it to a boil, and cleaned cast iron while waiting. Poured water into the sink over the silverware to sterilize. Added soap (https://www.mrsmeyers.com/product/dish/dish-soap/liquid-dish-soap-basil/) and a quick squirt of water because I like bubbles. Used the remaining 24 cups to rinse (had 2 cups left over). measured using a measuring cup. After dishes, used the water to soak pans (rice pan was not fun) and scrubbed them out.
"Each of us have a unique and necessary gift to the world. The purpose of life is to express our gifts. We are all here to contribute our gifts toward something greater than ourselves, and will never be content unless we are." - Charles Eisenstein
I did the dishes this morning. Used our new fancy soap (Ecover) which says it is biodegradable. I start with hot water in the biggest bowl of the washing session (3L in this case), then dump it out and rinsed into it to show the accumulated rinse water. In total about a gallon of water used. I stacked the dishes pretty high in the rack but if that isn't enough I can do another round. The bowl I washed and rinsed in was rinsed out and added to the drying rack after the last picture was taken to prove the volume of water used...
"Hundreds of years from now it will not matter what my bank account was, the sort of house I lived in or the type of car I drove... But the world may be different because I did something so bafflingly crazy that it becomes a tourist destination"