You must notify the responsible authority under certain conditions of any change in the location, condition or operation of a wastewater treatment plant.
A team of experts from the environmental agency and Hamburg Water provides information on heavy rain prevention. The aim is to keep the damage that could be caused by heavy rain events in the city as low as possible.
Do you want to allow rainwater to seep into the ground on your property? Under certain conditions, rainwater infiltration is permitted without a permit and only needs to be reported/notified.