Groundwater, temporary discharge (at source)
When you start digging a construction pit or basement, the idea is to discharge excess groundwater into surface water, such as a ditch, puddle or pond. If this is really not possible, you can also discharge to the sewer system. You need permission or a permit to extract and discharge groundwater to surface water or the sewer system.
Instruction text: If you want to extract and/or discharge groundwater, always report it to the Water Board first. You may need a permit.
What is the process like at the municipality?
Do you want to discharge to the sewer? Then - after approval from the water board - contact the municipality. The municipality will then assess where you can discharge.
You submit an application with the following information:
- Name of applicant, actual discharger and contact information
- Withdrawal and discharge data (duration, quantity)
- The approval of the water board
Cost and lead time
We can only process complete applications. The processing time is approximately 2 weeks.
There is no fee for the notification. Depending on the quality of the water you intend to discharge, the municipality may incur additional costs for sewer maintenance. We will pass these costs on to you. If the municipality needs to install pipes to allow you to discharge groundwater, this will also incur costs. The actual costs, including preparation and supervision, will be billed to you by the municipality.
Conditions for contractors when discharging groundwater to sewer system
- You install a sand trap structure with a capacity tailored to the discharge;
- You are placing a high-water alert;
- You use the discharge points specified by the municipality;
- Discharge of groundwater can take place in a well (with a lid) or a gully (grate in the sidewalk). For longer-term discharges or traffic unsafe situations, the municipality, at the applicant's expense, makes a separate connection