The municipality provides public sewer connections on private property. Is your home or business not connected to the sewer system? Then request a connection from the municipality. You can read more about this here.
Sewage no longer drains properly? If so, you may have a sewer blockage. Often a sewer blockage is caused by improper sewer use. Here you can read what you can do if you suffer from a sewer blockage.
You pay sewerage charges for discharging wastewater or rainwater into the municipal sewer system. From the revenue, the municipality maintains and renews the sewers. You can find more information about the sewerage levy here.
You may only lay cables and pipes in the ground in public areas. You must first report this to the Land Registry. In some cases you need an environmental permit. Here you can find more information about laying cables and pipes in public land.