it’s mainly to avoid polluting the groundwater, environmental laws are strict and people tend to stick to the rules (and will call the police on you if you don’t)
Annex 49 of the decree about the requirements to evacuate used water in waterways
(Abwasserverordnung - AbwV)
Requirements described by DIN EN 858 parts 1 and 2, DIN 1999-100, DIN 1999-101, DIN 1986-3, DIN
1986-30, DIN EN 1610 and codes of practice DWA-M 167 parts 1 and 2 and ATV-M 143 part 6
Meanwhile in Germany, you can’t clean your car in your own driveway because it could pollute the soil, with a fine up to €50k
Faith in humanity restored
Whaaaat
it’s mainly to avoid polluting the groundwater, environmental laws are strict and people tend to stick to the rules (and will call the police on you if you don’t)
Do they require car wash stations to have a water treatment plant on site?
of course!