If you want to allow rainwater to seep into the ground on your property, you may need to report this.
Do you want to drain rainwater or discharge it into a surface water body? Then you must apply for a water law permit.
If you want to infiltrate rainwater on your property, you may need a permit. You can find more information here.
If you have a water law permit for the discharge of stormwater and you want to change the discharge, you must apply for a permit change.
A wastewater charge is levied for discharging wastewater into surface water or groundwater. The wastewater charge you pay can be offset against certain investments you have made if certain conditions are met.
If you want to discharge commercial wastewater into a private wastewater plant or sewer system, you usually need to apply for a permit in advance.
A new or additional sewer connection requires approval according to § 7 HmbAbwG.
If you notice that wastewater is not draining properly in the public sewage system, you can report this to the responsible authority.
Do you want to discharge wastewater (sewage or rainwater) into a surface water body? Then you can apply for a water law permit.