Analysis of PI in F.Y.2012

Analysis of Performance Indicators (PI) in Guidelines for the Management and Assessment of Drinking Water Services in F.Y.2012

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Abstract

Water Utilities and PI Calculation

 PIs were calculated for drinking water utilities and bulk water suppliers. Small-scale water utilities and private water suppliers were not included. The data of water utilities are as of March 31, 2013.

Analysis of PI

 PIs are calculated based on "Drinking Water Statistics 2012", which were published by JWWA. The equations in histograms are taken from the Guidelines for Drinking Water Services. Please refer to the Guidelines to know the definition of each term in the equations.

Work

  1. Creation of 2012 PIs histograms of water utilities in Japan
     Drinking water utilities: 91 PIs
     Bulk water suppliers: 55 PIs
     
  2. Calculation of percentiles


Note
 The average exchange rate in F.Y.2012 (From April 2012 to March 2013) between JPY (Japanese Yen) and USD (U.S. Dollar) was 1,000 to 12.37.

Histograms of Utilities in all over Japan

How to read histograms
Reference

No.Performance Indicator (PIs)BW
1001Resource availability ratioX
1002Surplus capacity of resourcesX
1003Effective raw water ratioX
1004Self owned resources ratioX
1105Achievement ratio of comfortable water based on musty odor
1106Achievement ratio of comfortable water based on odor of chlorine
1107Compliance for TTHM
1108Compliance for TOC
1110Compliance for heavy metals
1111Compliance for inorganic substances
1112Compliance for organic substances
1113Compliance for chlorinated organic compounds
1114ACompliance for disinfection by-products
1114BCompliance for disinfection by-products
1115Direct supply from distribution main (Water service system without receiving tank)
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 accident
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
2210ARatio of earthquake-resistant pipelineX
2210BRatio of earthquake-resistant pipelineX
2210CRatio 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 utilization
3101Number of employees' qualificationsX
3105Technical employees ratioX
3106Years of experience for water supply servicesX
3109Transmission input per employeeX
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 input
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

"BW" means Bulk Water Supply.           

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