It is commonly recognized that public nuisances are classified to three categories due to their characters; industrial, urban and others. The author will discuss in this paper on the industrial and urban nuisances in Sapporo.
Among these nuisances, urban one may be considered not only as occurring in urban area, but also as results from the unbalance between increasing city population and urban public facilities such as sewerage system or others. The lack of public facilities are main factors of urban nuisance.
The author analyzed air and water pollution in Sapporo as shown in Figs. 1 and 2. Air pollution with high sulphur content is limited to CBD area and it seems to have diminished with the completion of district central heating in a part of the CBD. But residential districts around the city have been gradually polluted with low sulphur content. In order to eliminated air pollution, it is necessary to equip the district central heating adjacent to CBD area and also at residential districts.
Water pollution is most closely related to the lack of sewerage system. At the Shinkawa river which runs through the western parts of the city, extreme pollution is caused by waste water from chemical factories and fish processing ones.
From the above view points, there are many latent factors outside the 6 kilometers sphere where population is increasing much higher than any other districts.
