Page 76 - AirSelangor_Sustainability_Report_2021
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Performance Data
DESCRIPTION 2018 2019 2020 2021
OPERATIONS
Total number of accounts 2,334,224 2,412,735 2,491,888 2,557,248
Number of accounts by type
• Domestic 2,014,227 2,091,711 2,166,925 2,230,180
• Commercial 306,496 307,401 311,237 313,256
• Others 13,501 13,623 13,726 13,812
Total number of consumers 8,056,908 8,366,844 8,400,500 1 8,418,100
Total number of dams 7 7 8 2,3 8 2,3
Total number of WTPs 33 34 34 34 4
Average water demand (MLD) 4,857 4,932 4,965 4,991
Total number of pump houses 653 731 732 728
Total number of service reservoirs 1,574 1,601 1,610 1,599
Total number of HORAS - - 1 1
Total number of ORS 2 2 3 3
Total length of pipes (mapped using GIS) (km) 28,641 29,044 29,540 30,008
Water reserve margin (%) 5.87 10.98 11.87 13.63
Average water quality compliance (%) 99.69 99.80 99.74 99.80
Average NRW rate (m method) (%) 31.69 29.66 28.53 27.93
3
Pipe burst index (no./100 km/year) 13.52 9.61 8.87 6.37
Total number of pipe leak cases 104,033 108,759 124,614 135,413
Length of pipes laid per year (km) 113.89 259.85 85.60 96.80
Total number of pipe cleaning works 6,511 7,960 8,853 9,027
Total number of reservoir cleaning works 106 153 122 265
Total number of active water quality sampling stations 1,121 1,121 1,117 1,122
Overall Asset Condition Score - 2.24 2.14 2.00
1 The number of consumers was revised according to the published information by the Department of Statistics Malaysia for the year 2020.
2 Kelau Dam was handed over to Air Selangor in 2020.
3 Seven dams are under the supervision of Air Selangor, whereas Batu Dam is under the supervision of the Department of Irrigation and
Drainage.
4 Thirty-one WTPs are operated by Air Selangor, and three WTPs are under appointed parties.
