7. Peeing in the shower is banned at Concordia.
All the fresh water at Concordia is made of snow. They need a lot of fuel to melt it which is why they work hard to save water: after being used in the showers, the water is properly cleaned and delivered for reuse. This is why people can’t use their own soap and shower gel there: everyone is provided with a 3-in-1 shampoo that is compatible with the cleaning system. You also can’t pee in the shower because the system doesn’t cope with the recycling of human waste. If maintenance workers find an increased level of ammonium in the water, they make an announcement about it at a general meeting.
Here you can watch a short video tour of Concordia.
Source brightside