- Compagnie Intercommunale des Eaux Source les Avins - Groupe Clavier - Compagnie Intercommunale Liégeoise des Eaux in Liège IDEN - Intercommunale de Distribution d'eau de Nandrin-Tinlot et environs IECBW - INASEP - Intercommunale Namuroise de Services Publics The towns of Chimay, Burg-Reuland, Trois-Ponts and St-Vith have their own municipal utilities. There are also six intermunicipal sanitation utilities: AIDE - AIVE - Association Intercommunale pour la Valorisation de l'eau pour la Province de Luxembourg IBW - Intercommunale du Brabant Wallon IGRETEC - INASEP - Intercommunale Namuroise de Services Publics IPALLE - Intercommunale de Propreté Publique du Hainaut Occidental There is also one intermunicipal water and sanitation utility: IDEA - Intercommunale de Développement Economique et d'Aménagement de la Région Mons-Borinage-Centre. The seats in the boards of directors of the intercommunales are distributed according to political majorities in the communes. "Most intercommunales are controlled by coalitions between the (Walloon) Socialist Party and the (Walloon) Christian Democrats Party." Brussels region The Intercommunale bruxelloise de distribution d'eau (IBDE) is in charge of water distribution and billing for 19 municipalities in the Brussels region. Previously the Intercommunale Bruxelloise d'Assainissement (IBRA) had been in charge of stormwater drainage and sanitary sewers in the Brusels region, which had only been created in 2000 to replace four Intercommunales for Sanitation. The former Compagnie Intercommunale Bruxelloise des Eaux (CIBE), renamed Vivaqua in 2006, sells bulk water to the city of Brussels. It also operates its sewer network and the Brussels-South wastewater treatment plant on behalf of IBDE. Vivaqua also provides services to other municipalities and intermunicipal associations in both Flanders and Wallonia with a total of 309,000 connections and 2.1 million direct and indirect clients. Associations BELGAQUA is the Belgian federation for the water and sanitation sector representing its member utilities. It regroups three regional trade associations: AQUABRU for the Region of Brussels-Capital AQUAWAL for the Walloon Region AQUA FLANDERS for the Flemish Region. Aquawal is the trade association of public water and sanitation service providers in Wallonia. Financial aspects Tariffs Water tariffs throughout Belgium are increasing-block tariffs with higher unit prices for higher consumption. The number and size of blocks as well as tariff levels for each block vary between regions and service providers. Although PIDPA (in the Flemisch Region, the Antwerp Campine (de Kempen in Dutch)) has changed this in 2009. The unit price has risen for those who have a low consumption (<250 Cu meter/year), and