Open AccessThis article presents serious and every day increasing problem – particulate matter air pollution (PM10, PM2.5) and discusses particulate matter effect on humans health and life quality. Research reveals legal acts regulating the limit values of particulate matter. Following the requirements of the EU directives and national legislation, limit values applicable in the assessment of particulate matter concentrations are given. Recent research shows that most of their time people spent indoors, and therefore indoor air pollution may be even higher than that outdoors and this is the reason why indoor air pollution is being investigated. In conclusion, this article gives the means of reducing particulate matter air pollution indoors which are 3 main indoor air quality improvement strategies.