About management and the quality of the water about waterworks from cistern to receive in apartment buildings to faucet, it was jurisdiction of Health and Social Welfare Bureau. However, because sanitary problem by incompleteness of management occurs, the water supply method is revised in June, 2001, and even Water Works Bureau supplying water to will participate about management of water tank Channel.
In Yokohama-shi, it revises the water supply regulations in December, 2002 and gives following response.
(1) Depending on request from user (inhabitants) for water tank water supply, Water Works Bureau performs examination of water with faucet of each house free and tells about the result.
(2) When we jointly carry out examination of water with cistern to receive and check in cooperation with Health and Social Welfare Bureau when safety of the quality of the water has a problem as a result of examination of water with faucet, and it is admitted that it is necessary about management of water tank Channel, instruction advises for installer of water tank Channel and urges. Examination of water is not included in the water supply method enforcement regulations,
(i) Thing that user for the quality of the water is highly concerned with
(ii) Plan equalization of user and services such as single-family houses
(iii) In consideration of examination of water being necessary, we became the regulations as Motoichi original correspondence to judge the management situation of water tank water supply.
In addition, there is no change in contents of managerial responsibility of water tank water supply installer based on the regulations ("the regulations about securing of drinking water which is hygienic by security in Yokohama-shi simple water supply water supply and small scale tray water tank water supply") of the water supply method and Health and Social Welfare Bureau jurisdiction.