The Environment supervision supervises the activities of various companies and operators according to the Environmental Protection Act and the Waste Act, for example. Certain activities are subject to permission or declaration according to the above-mentioned acts, decrees adopted thereunder or municipal regulations. The Environment and Building Control Department can be informed about defects causing risk of environmental contamination. These may include unauthorised landfills, harmful emissions observed in water systems or air and other activities against the regulations concerning environmental protection.