Indoor Radon Exposure in Italian Schools

• Main Authors: Antonio Azara, Marco Dettori, Paolo Castiglia, Andrea Piana, Paolo Durando, Valentina Parodi, Giovanni Salis, Laura Saderi, Giovanni Sotgiu
• Format: Article
• Language: English
• Published: MDPI AG 2018-04-01
• Series: International Journal of Environmental Research and Public Health
• Subjects: radon; school; schoolrooms; indoor air quality; Italy
• Online Access: http://www.mdpi.com/1660-4601/15/4/749

Background: The aim of the study was to assess radon concentration in schoolrooms in a city located in the midwest of Italy. Methods: A two-phase environmental study was carried out in 19 school buildings of 16 primary, secondary, and tertiary schools. Results: Median (interquartile range—IQR) indoor radon concentration in schoolrooms was 91.6 (45.0–140.3) Bq/m3. The highest (median 952.8 Bq/m3) radon concentration was found in one (3.6%) classroom, located in a building of a primary school whose median concentration was 185 Bq/m3. Radon concentration was significantly correlated with the number of students and teachers, foundation wall construction material, and with the absence of underground floors. A geopedological survey was performed close to the building with highest radon level, showing the presence of granite and tonalithic granodiorite in the soil. Conclusions: Radon levels should be routinely assessed where individuals live or work. Schools are susceptible targets, because of childhood stay and the long daily stay of occupants. Low-cost interventions, such as implementation of natural air ventilation and school maintenance, can reduce radon levels, limiting individual exposure.