This dataset corresponds to the three aircraft noise restriction zones defined by the order of the Government of the Brussels-Capital Region of 27 May 1999 on the fight against the noise generated by air traffic. It's made of one geometric clas.

This dataset corresponds to the nitrate-vulnerable zone in accordance with the prescriptions of the European Directive 91/676/EEC, by the Ministerial Order of 25 May 1999. It is made of one geometric classe : the nitrate-vulnerable zone.

Brussels-Capital Region: Monitoring network of the nitrate content in surface waters and groundwater. It was designated in accordance with the prescriptions of the European Directive 91/676/EEC concerning the protection of waters against pollution caused by nitrates from agricultural sources, by the Ministerial Order of 25 May 1999.