農村地帯に於ける地表水に関する公衆衛生学的研究

第1報千葉県下の使用水の給水源に関する調査成績

抄録

The author reported the results of a survey which was conducted, for the purpose of studying the actual situation in the household use of water other than tap water an well water, on the 3 rd-grade pupils of all public junior high schools in Chiba Prefecture and the summary of the results is as follows.
1. As a result of a survey which was conducted from September through October 1955 concerning the use of water in each household, with a total of 44, 666 pupils of public junior high schools in Chiba Prefecture as the objects, it was found that the rate of sending in answers in inquiry cards was 82.2%, being equivalent to 8.7% of the whole households in this prefecture.
2. The source of water supply for drinking water exclusive of tap and well waters in Chiba Prefecture was about 3.0% and river water was 0.5% or so.
3. Throughout the prefecture, the rate of utilization of river water as drinking water was 0.75% and broken down by city and county Sawara City located along the Tone River showed such a high rate as 11.8%.
4. Thus it was made known that river water was being used as brinking water with considerable high proportions in certain areas, and as regards water for miscellaneous purposes, the rate of use of river water is, in rural zones (counties), about 10 times as high as that for drinking, indicating that water obtained from rivers still occupies a fairly large proportion in the domestic use of water.