Water Supply Business Overview

With Yokohama-shi water supply business summary, we gather every year to provide customers with information about water supply business of Motoichi including introduction of water supply facilities, financial situation and result of water examination.

Cover PDF data (PDF: 399KB)

The regulations (PDF: 378KB) about setting of Yokohama-shi water supply business and industrial water supply business

Table of Contents (PDF: 761KB)

Chapter 1 Outline of Yokohama Channel (PDF: 2,338KB)
(1)History of Water Supply Business
(2)Water Supply System in Yokohama City
(3)Yokohama City Water Supply Business Overview
(4)Trends in Water Supply Demand
(5)Water sources owned by Yokohama City
(6)Water sources, etc. by business operator in joint development
(7)Water supply by year and month

Chapter 2 Introduction of Water Supply Facilities in Yokohama City (PDF: 2,094KB)
(1)Changes in Water Supply Business
(2)Dam facility
(3)Water intake facilities
(4)Water supply facilities
(5)Water purification facilities
(6)Transmission and distribution facilities
A: Water distribution block diagram
B: Distribution blocks and distribution reservoirs
C: Transmission and distribution pumps
D: Pipe type distribution pipe extension
(7)Water supply facility flow sheet diagram
(8)Doshi Water Source Forest

CHAPTER 3 Major Business of Yokohama Channel (PDF: 1,680KB)
(1)Formulation of Yokohama Water Supply Long-Term Vision and Medium-Term Management Plan
(2)Medium-Term Management Plan (FY2021–5) Fiscal Balance Plan and Results
(3)Core facility maintenance business
(4)Water distribution pipe maintenance business
A: Summary table
B: Measures for pipe network maintenance
C: Measures against aging pipes
D: Water leakage prevention measures
(5)Sagami Reservoir Deposit Protection Project

Chapter 4 Outline of Water Supply Finance (PDF: 1,039KB)
(1)Financial Results Summary Table
(2)Statements of Income
(3)Balance Sheets
(4)Statements of Cash Flows
(5)Personnel expenses and number of staff
(6)Financial Analysis Ratio
(7)Corporate bonds
A: Outline of corporate bonds
B: Unpaid balance of corporate bonds (end of each fiscal year)
C: Breakdown of outstanding balance by interest rate
(8)Income from national treasury subsidies

Chapter 5 Water Charges for Yokohama City (PDF: 1,306KB)
(1)July 2021 rate revision
A: Water charge table
B: Outline of fee revision
(2)Water service subscription unit price table
(3)Number of water supply units by application / year, revenue water volume, fee income
(4)Number of water supply units by application and stage, amount of revenue water, fee income
(5)Receivable water volume by application and basic excess

Chapter 6 Creating a Water Supply Resistant to Disasters (PDF: 2,134KB)
(1)Emergency water supply plan
(2)Breakdown of underground water supply tanks for disasters
(3)Underground water tank, distribution reservoirs, earthquake-resistant hydrants
(4)Emergency water tap installation list
(5)disaster drill Preparing for Disasters
A: disaster drill (Emergency Water Supply Training)
B: Joint disaster drill with private business operators
(6)Efforts to store drinking water
(7)Development of water supply facilities in preparation for disasters
(8)Improvement of aging water pipes
(9)Efforts to secure repair materials in the event of a disaster
(10)Development of emergency power generation facilities
(11)Efforts to secure fuel
(12)Measurement of Radioactive Materials

Chapter 7 To Deliver Safe and High Quality Water (PDF: 3,590KB)
(1)Water quality improvement measures
A: Environmental improvement business and maintenance business related to Sagamiko and Lake Tsukui
B: Installation of Aoko fence at the Sagamiko intake
C: Subsidies for Doshi Village Wastewater Treatment Business
D: Improving water quality by injecting activated carbon
E: Cryptosporidium countermeasures (turbulence management, etc.)
(2)Composition of water quality standards and water quality items
(3)Plan and results of water quality inspection
A: Water quality inspection point of water source
B: City water quality inspection point
C: Water quality aging
D: Water quality overview
(4)Management status of water supply equipment and water tank water supply
A: Improvement of management standards for water tank water supply
B: Management classification based on capacity of receiving tank (Yokohama City)
C: Inspection organization for water receiving tanks
D: Water tank water supply patrol inspection
(5)Promotion of direct water supply

Chapter 8 About industrial water supply business (PDF: 1,197KB)
(1)History of Industrial Water Supply Business
(2)Outline of Business
A: Water Resources (Water Rights)
B: Outline of construction costs and construction funds
C: Water supply capacity
D: Water supply area and distribution pipe extension
E: Water quality standards for industrial water
(3)Financial Conditions
A: Financial Results Summary Table
B: Statements of Income
C: Balance Sheets
(4)Revision of industrial water rates
A: Overview of industrial water rates revision
B: Changes in Industrial Water Rates
C: Medium-Term Management Plan (FY2021–5) Fiscal Balance Plan and Results

Chapter 9 About Kanagawa Prefectural Wide Area Water Supply Corporation (PDF: 1,230KB)
(1)Outline of the Founded Business
(2)Overview of the Sagami River Water System Construction Project (Phase 1)
(3)Breakdown of water supply
(4)Breakdown of Water Supply Price
(5)Breakdown of Water Supply Charges
(6)Breakdown of water received by corporate groups

Reference (PDF: 756KB)
(1)List of Water Works Bureau Organizations
(2)Outline of Water Works Bureau Organization and Division