For the water supply of crops, generally greenhouse horticulture businesses initially use rain water. The rainwater is stored in basins. In addition to rainwater as good irrigation water, groundwater (after treatment) is also a good option. Surface water and tap water are clearly a lesser alternative.
Particularly in the western part of the Netherlands, the groundwater in the water carrying levels is salty. The salt water can pass through a (reversed) osmosis installation. Through this, approximately 50% of the extracted water can be made suitable for crops. In the other 50% of the water, the chloride content has roughly doubled.
For both the extraction as the discharge permission is required. The application for these permissions including the necessary documentation is often prepared by Mos Grondmechanica.