In the event of a noise issue, the citizen should diagnose the source of the noise and report the situation in detail to the entity(ies) responsible for licensing the activity and/or for oversight, control, and mitigation of the disturbances caused by the noise.

The table below summarizes various typical noise-related situations. It is not intended to be exhaustive but merely indicative.

Noise Source	Applicable Legislation	Where to Complain
Neighbors (noise caused by pets, music, voices, etc.)	General Noise Regulation – Article 24	Police Authorities
Commercial Establishments (restaurants and bars, supermarkets, butcher shops, gaming halls, sports pavilions, bakeries, car repair shops, laundromats, etc.)	General Noise Regulation – Article 13	The entity responsible for licensing or authorizing the activity (municipality) General inspection of Agriculture, Sea, Environment, and Territorial Planning CCDR Police Authorities
Services (banks, post offices, schools, religious activities, etc.)	General Noise Regulation – Article 13	The entity responsible for licensing or authorizing the activity General Inspectorate of Agriculture, the Sea, the Environment, and Territorial Planning CCDR
Industry	General Noise Regulation – Article 13	Licensing entity for the activity (IAPMEI, I.P. – Agency for Competitiveness and Innovation, municipalities) General Inspectorate of Agriculture, the Sea, the Environment, and Territorial Planning CCDR
Quarries	General Noise Regulation – Article 13	Licensing entity for the activity (Directorate-General for Energy and Geology or the respective Municipality) General Inspectorate of Agriculture, the Sea, the Environment, and Territorial Planning CCDR
Wind Farms, Energy Transmission Lines, Power Plants, Substations	General Noise Regulation – Article 13	Licensing entity for the activity (Directorate-General for Energy and Geology) General Inspectorate of the Environment and Territorial Planning CCDR
Transport infrastructure (motorways, main and complementary roads, national and municipal roads, railways, airports, airfields)	General Noise Regulation – Article 19	Licensing entity/responsible for the operation of the infrastructure (Infraestruturas de Portugal S.A., municipalities, ANA – Portuguese Airport Authority, airfield administration) or motorway concessionaires General Inspectorate of Agriculture, the Sea, the Environment, and Territorial Planning CCDR
Festivities, sports events, public entertainment, and noisy activities held on streets, gardens, and other public outdoor areas	Decree-Law No. 204/2012, of 29 August	Police authority Municipality
Renovation, refurbishment, or maintenance works carried out inside residential, commercial, or service buildings	General Noise Regulation – Articles 16 to 18	Police authority Municipal Police
Temporary noisy activities not included in the two items above	General Noise Regulation – Articles 14, 15, and 18	Police authority Municipal Police
Other noise sources (e.g., air conditioning units, bird-scarer devices)	General Noise Regulation – Article 21	Licensing entity
Vehicles	General Noise Regulation – Article 22	Police authority
Alarms installed in buildings	Decree-Law No. 114/2011, of 30 November	Police authority
Collective building equipment (lifts, booster pump systems, centralized mechanical ventilation systems, garage door automation systems, power substations, and drainage systems)	Building Acoustic Requirements Regulation	Municipality
Outdoor-use equipment	Decree-Law No. 221/2006, of 8 November	Food and Economic Safety Authority (ASAE) and General Inspectorate of the Ministry of Labour, Solidarity and Social Security
Acoustic insulation of buildings	Building Acoustic Requirements Regulation	Municipality

Note:
- General Noise Regulation, approved by Decree-Law No. 9/2007, of January 17, rectified by Rectification Declaration No. 18/2007, of March 16, and amended by Decree-Law No. 278/2007, of August 1.
- Regulation of Acoustic Requirements for Buildings, approved by Decree-Law No. 129/2002, of May 11, as amended by Decree-Law No. 96/2008, of June 9