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F.Y.2012

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  • Analysis of PI
  • F.Y.2012

Analysis of PI

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

   

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

No. Performance Indicator (PIs) BW
1001 Resource availability ratio X
1002 Surplus capacity of resources X
1003 Effective raw water ratio X
1004 Self owned resources ratio X
1105 Achievement ratio of comfortable water based on musty odor  
1106 Achievement ratio of comfortable water based on odor of chlorine  
1107 Compliance for TTHM  
1108 Compliance for TOC  
1110 Compliance for heavy metals  
1111 Compliance for inorganic substances  
1112 Compliance for organic substances  
1113 Compliance for chlorinated organic compounds  
1114A Compliance for disinfection by-products  
1114B Compliance for disinfection by-products  
1115 Direct supply from distribution main (Water service system without receiving tank)  
1117 Ratio of lead service lines  
2001 Drinking water storage volume per population supplied  
2002 Transmission input per population supplied  
2003 Surplus capacity of purification X
2004 Service reservoir capacity X
2005 Restricted water supply  
2006 Population served by water supply  
2007 Distribution mains density  
2008 Customer meter density  
2101 Aging of water treatment facilities X
2102 Aging of electric and mechanical equipments X
2103 Aging of mains X
2104 Mains rehabilitation X
2106 Valves replacement X
2107 Newly installed mains X
2201 Accidental water resource pollution X
2202 Trunk mains failures X
2203 Available water volume in an accident  
2204 Population supplied water in an accident  
2205 Water supply points density in emergency  
2207 Ratio of earthquake-resistant treatment facility X
2208 Ratio of earthquake-resistant pumping station X
2209 Ratio of earthquake-resistant service reservoir X
2210A Ratio of earthquake-resistant pipeline X
2210B Ratio of earthquake-resistant pipeline X
2210C Ratio of earthquake-resistant pipeline X
2211 Chemicals stock X
2212 Fuel stock X
2213 Water truck  
2215 Water service tank carried by vehicles  
2216 Ratio of non-utility generation facility X
3001 Operating ratio X
3002 Ratio of current expense to current income X
3003 Rate of total returns X
3004 Ratio of cumulative deficit X
3005 Percentage of money transferred(revenue receipts) X
3006 Percentage of money transferred(capital income) X
3007 Revenue on water sales per personnel X
3008 Ratio of personnel salary costs for revenue on water sales X
3009 Ratio of income bond interest for revenue on water sale X
3010 Ratio of depreciation cost for revenue on water sales X
3011 Ratio of principal redemption on revenue bond for revenue on water sales X
3012 Ratio of unamortized balance on revenue bond for revenue on water sales X
3013 Ratio of tariff to production X
3014 Unit tariff of water supply X
3015 Cost to water supply X
3016 Charge for one month per 10m3 for domestic  
3017 Charge for one month per 20m3 for domestic  
3018 Revenue water ratio  
3019 Rate of facility utilization X
3020 Maximum rate of operation X
3021 Average rate of loading X
3022 Current ratio X
3023 Ratio of net worth to total capital X
3024 Ratio of fixed assets to equity capital X
3025 Ratio of principal redemption cost on revenue bond to depreciation cost X
3026 Turnover of fixed assets, fixed assets turnover X
3027 Efficiency of fixed assets utilization  
3101 Number of employees' qualifications X
3105 Technical employees ratio X
3106 Years of experience for water supply services X
3109 Transmission input per employee X
3110 Number of meters per employee  
4001 Electric power consumption per 1m3 transmission input  
4002 Energy consumption per 1m3 transmission input  
4003 Renewable energy use ratio X
4004 Recycling ratio of generated sludge from purification plants X
4005 Recycling ratio of construction by-products X
4006 Emission of CO2 per 1m3 transmission input  
4101 Underground water ratio X
5009 Outsourced purification plant ratio X
5102 Ratio of ductile iron and steel mains X
5103 Number of pipeline failures X
5106 Number of service pipe failures  
5107 Leakage rate  
5108 Leakage volume per contracted service connection  
5109 Hour of water interruption or water turbidity  
5112 Valve density X
5114 Hydrant density  

"BW" means Bulk Water Supply. 

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