observation. The following information was additionally recorded:(a) date and time; (b) weather data including precipitation, winddirection, wind speed, and temperature; and (c) other comments(Nimmermark et al., 2005).200 participants were divided to 50 groups. Each groupincluded 1 participant from each age period. A total of 33,600questionnaires were gathered, except on rainy days, and odor observationswere recorded together with a professional odorpanelist. Monitoring was conducted at the same sites as the measurements(A-1eA-6 and B-1eB-3). Various odor samples weretested for 2 months to judge the OI of odorants before monitoring