The marker of oxidative DNA damage 8-oxodeoxyguanosine (8-oxodG) was investigated in the urine of 894 children aged 6–10 years. 8-oxodG was determined by ELISA. The exposure to PM10 and PM2.5 as measured by stationary monitors during a 7-day period as well as to c-PAHs as measured during 3-day periods 1–3 and 7–9 days were identified as factors affecting 8-oxodG levels in collected urine according to multivariate models. Short-term exposure to fine particles and c-PAHs also induced oxidative stress, and therefore may be a starting point for respiratory and allergic morbidity in children (Svecova et al., 2009).