The topic of indoor air quality has attracted great interest since urban dwellers spend over 90% of their time indoors, such as public facilities, public transport and homes. In this study, the changes and current status of indoor air quality management and improvement policies for public facilities in Korea were discussed. Furthermore, we investigated the concentration and contamination status of indoor air pollutants based on the indoor air quality guidance and inspection report from 2007-2017 published by the Ministry of Environment, Korea. As a result, we found that while the PM10 concentration in public facilities decreased consistently, there was no clear change in the CO2 concentration. The HCHO concentrations were high in museums, art galleries, and postpartum centers, etc. The child care centers showed a high concentration of TCB. In conclusion, we suggested that it is necessary to focus on target substances according to the type of facility to manage indoor air quality efficiently. Intensive management and monitoring are particularly needed in child care centers to improve the indoor air quality.

As a result of the increasingly serious air pollution worldwide, there are many social costs in the country. In general, there are legal measures to improve air quality such as investment projects, input of public funds, attraction of private capital, and regulation of air pollution prevention. In this study, we propose future legislative policies through the following analysis on the status of various researches in domestic and foreign countries for the improvement of air quality and related legal system. The domestic indoor air quality is getting better through ongoing management. From a legal perspective, The air quality law, such as indoor air quality law and environmental law, has been continuously revised to improve indoor air quality. However, contrary to the air quality law, indoor air quality management is carried out by various related departments under current law. Due to the different management facilities and management standards of each ministry, the effectiveness of relevant laws is deteriorated in organically managing multi-use facilities. This may lead to confusion and may be an impediment to the effective achievement of the institution's objectives. The pollutants of interior space are one of the main causes not only building materials, but also office equipment such as computers. however, The pollutants to be managed under the current legislation are mainly limited to building materials. In addition, the criteria set for each pollutant have a problem that it depends on the after-regulation standard that is made after the pollutant is released from the pollutant source. There is a need for systematic analysis and research to prevent adverse effects that may occur due to pollution sources through the prevention system. It is time to change the direction of regulation-oriented policies and to make policy changes that can improve air quality through systems such as emission trading system..