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Analysis of PI in F.Y.2006

Analysis of Performance Indicators (PI) in Guidelines for the Management and Assessment of Drinking Water Services in F.Y.2006

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Purpose

 "Guidelines for the management and assessment of drinking water services" was established as a standard of the Japan Water Works Association in January 17, 2005. Moreover, "Description - Guidelines for the management and assessment of drinking water services" was established in October in the same year. Using "Guidelines for the management and assessment of drinking water services", drinking water utilities have been able to evaluate their own situation objectively, analyze their issues, try to make a solution, and consequently, develop their water service activities. It is required that "Guidelines for the management and assessment of drinking water services" is widely understood and used among drinking water utilities.
 Because of the requirement mentioned above, Japan Water Research Center (JWRC) made Performance Indicators (PIs) histograms of drinking water utilities in all over Japan based on FY2003 data.

Abstract

Type of drinking water utilities for PI calculation

 Drinking Water Utilities and Bulk Water Supply Services in all over Japan are included, exemption of Small-Scale Water Utilities and Private Water Supply as of March 31, 2007.

Analysis of PI

 81 PIs are able to be calculated based on "Statistics on water supply" (F.Y.2006) published by the Japan Water Works Association (JWWA). PIs can be calculated formulas from "Guidelines for the management and Assessment of Drinking Water Services (JWWA Q100)" published by the JWWA. Please refer to "Guidelines for the management and assessment of drinking water services" about the definition of each term in the formulas.

Work

  1. Making F.Y.2006 PIs histograms of utilities in all over Japan
     Drinking Water Utilities in all over Japan: 81PIs
     Bulk Water Supply Services in all over Japan: 57PIs
     
  2. Calculating Percentiles
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Histograms of Utilities in all over Japan

 Files below are PDFs. Please close PDFs when you open many windows for avoiding PC trouble.
 

How to read histograms

No.Performance Indicator (PIs)BW
1001Resource availability ratioX
1002Surplus capacity of resourcesX
1003Effective raw water ratioX
1004Self owned resources ratioX
1117Ratio of lead service lines
2001Drinking water storage volume per population supplied
2002Transmission input per population supplied
2003Surplus capacity of purificationX
2004Service reservoir capacityX
2005Restricted water supply
2006Population served by water supply
2007Distribution mains density
2008Customer meter density
2101Aging of water treatment facilitiesX
2102Aging of electric and mechanical equipmentsX
2103Aging of mainsX
2104Mains rehabilitationX
2106Valves replacementX
2107Newly installed mainsX
2201Accidental water resource pollutionX
2202Trunk mains failuresX
2203Available water volume in an accidentX
2204Population supplied water in an accident
2205Water supply points density in emergency
2207Ratio of earthquake-resistant treatment facilityX
2208Ratio of earthquake-resistant pumping stationX
2209Ratio of earthquake-resistant service reservoirX
2210Ratio of earthquake-resistant pipelineX
2211Chemicals stockX
2212Fuel stockX
2213Water truck
2215Water service tank carried by vehicles
2216Ratio of non-utility generation facilityX
3001Operating ratioX
3002Ratio of current expense to current incomeX
3003Rate of total returnsX
3004Ratio of cumulative deficitX
3005Percentage of money transferred(revenue receipts)X
3006Percentage of money transferred(capital income)X
3007Revenue on water sales per personnelX
3008Ratio of personnel salary costs for revenue on water salesX
3009Ratio of income bond interest for revenue on water saleX
3010Ratio of depreciation cost for revenue on water salesX
3011Ratio of principal redemption on revenue bond for revenue on water salesX
3012Ratio of unamortized balance on revenue bond for revenue on water salesX
3013Ratio of tariff to productionX
3014Unit tariff of water supplyX
3015Cost to water supplyX
3016Charge for one month per 10m3 for domestic
3017Charge for one month per 20m3 for domestic
3018Revenue water ratio
3019Rate of facility utilizationX
3020Maximum rate of operationX
3021Average rate of loadingX
3022Current ratioX
3023Ratio of net worth to total capitalX
3024Ratio of fixed assets to equity capitalX
3025Ratio of principal redemption cost on revenue bond to depreciation costX
3026Turnover of fixed assets, fixed assets turnoverX
3027Efficiency of fixed assets utilizationX
3101Number of employees' qualificationsX
3105Technical employees ratioX
3106Years of experience for water supply servicesX
3109Transmission input per employee
3110Number of meters per employee
4001Electric power consumption per 1m3 transmission input
4002Energy consumption per 1m3 transmission input
4003Renewable energy use ratioX
4004Recycling ratio of generated sludge from purification plantsX
4005Recycling ratio of construction by-productsX
4006Emission of CO2 per 1m3 transmission inputX
4101Underground water ratioX
5009Outsourced purification plant ratioX
5102Ratio of ductile iron and steel mainsX
5103Number of pipeline failuresX
5106Number of service pipe failures
5107Leakage rate
5108Leakage volume per contracted service connection
5109Hour of water interruption or water turbidity
5112Valve densityX
5114Hydrant density
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