The situation is untenable, especially given the fact that the EU has set strict norms on the cleanliness of our waterways that must be met by 2027.
Figures from the Flemish environment company show that 13% of Flemish homes are not connected to the sewerage system. That's an average. In Horebeke in East Flanders only 13% of houses are connected. In Voeren (Limburg) and in Pepingen (Flemish Brabant) only a quarter of houses are connected. Worst offenders are rural municipalities, but in a city like Aarschot less than two-thirds of houses are connected!
Municipalities with the best connectivity include Antwerp, Mortsel and Edegem but also Drogenbos outside Brussels. The Building federation believes the number of houses not connected to the sewerage system needs to fall to 5% if Flemish waterways are to meet EU cleanliness norms. Connecting homes to the sewerage system isn't the only solution. Individual treatment of refuse water is possible, but there is a realisation that given the cost of building a sewer - 1,000 euros a metre - the expansion of the network is proceeding too slowly.