*Review* **Indoor Air Quality: A Focus on the European Legislation and State-of-the-Art Research in Italy**

**Gaetano Settimo 1, Maurizio Manigrasso <sup>2</sup> and Pasquale Avino 3,\***


Received: 1 March 2020; Accepted: 8 April 2020; Published: 10 April 2020

**Abstract:** The World Health Organization (WHO) has always stressed the importance of indoor air quality (IAQ) and the potential danger of pollutants emitted from indoor sources; thus, it has become one of the main determinants for health. In recent years, reference documents and guidelines have been produced on many pollutants in order to: i) decrease their impact on human health (as well as the number of pollutants present in indoor environments), and ii) regulate the relevant levels of chemicals that can be emitted from the various materials. The aim of this paper is to discuss and compare the different legislations present in the European Union (EU). Furthermore, a focus of this paper will be dedicated at Italian legislation, where there is currently no specific reference to IAQ. Although initiatives in the pre-regulatory sector have multiplied, a comprehensive and integrated policy on the issue is lacking. Pending framework law for indoor air quality, which takes into account WHO indications, the National Study Group (GdS) on Indoor Air Pollution by the Italian Institute of Health (IIS) is committed to providing shared technical-scientific documents in order to allow actions harmonized at a national level. An outlook of the main Italian papers published during these last five years will be reported and discussed.

**Keywords:** indoor air quality; legislation; Europe; focus; residential; pollutants; TLV; health; workers; school
