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Drainage Services Department - Sustainability Report 2018-19

Key Statistics and Data

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Key Statistics and Data

Environmental Performance

Energy Consumption

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
By DSD
Electricity Purchased1 GJ (Million kWh) 943,308
(262.03)		 992,808
(275.78)		 1,024,092
(284.47)		 1,082,376
(300.66)		 1,054,656
(292.96)
Total Equivalent Electricity Generated from Renewable Energy Sources2 Million kWh 29.34 34.68 21.70 28.15 28.50
Gasoline
Pool cars GJ (Litre) 893
(27,048)		 825
(24,974)		 627
(18,995)		 599
(18,155)		 379
(11,474)
AM cars GJ (Litre) 3,799
(115,060)		 3,497
(105,901)		 3,173
(96,097)		 3,422
(103,615)		 2,874
(87,045)
Biogas3 million m3 10 10 7 9 8
Purchased Electricity Consumption per Unit Volume of Sewage Treated kWh 0.26 0.27 0.28 0.30 0.28
By DSD's contractors (302-2)
Electricity GJ (Million kWh) 23,328
(6.48)		 97,798
(27.17)		 56,616
(15.73)		 16,480
(4.58)		 22,693
(6.30)
Gasoline GJ (Litre) 10,438
(316,101)		 6,834
(187,239)		 4,473
(135,461)		 4,525
(137,045)		 4,035
(122,186)
Diesel GJ (Million kWh) 27,451
(752,080)		 42,601
(1,167,162)		 12,540
(343,571)		 16,586
(454,411)		 39,106
(1,071,408)
1 The total electricity consumption includes the office at Revenue Tower, Kowloon Government offices and Western Magistracy, and DSD’s flood prevention and sewage treatment facilities (including sewage treatment works, sewage pumping stations and stormwater pumping stations).
2 The renewable energy sources harnessed by DSD include hydropower, solar power, and biogas.
3 Generated from sewage treatment works.

Greenhouse Gas (GHG) Emissions4

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
By DSD
Electricity purchased (Scope 2)5 Tonnes CO2e 183,421 193,046 199,129 210,462 205,072
Gasoline combustion (Scope 1)
Pool cars Tonnes CO2e 63.83 65.90 44.83 42.85 27.08
AM cars Tonnes CO2e 271.54 249.93 226.79 244.53 205.43
By DSD's contractors (305-3)
Electricity purchased (Scope 3) Tonnes CO2e 4,536 19,016 11,009 19,019 4,412
Fuel consumption (Scope 3)6 Tonnes CO2e 2,824 3,561 1,218 1,511 3,089
4 GHG emission were calculated based on the Guidelines to Account for and Report on Greenhouse Gas Emissions and Removals for buildings (Commercial, Residential or Institutional Purpose) in Hong Kong issued by the Environmental Protection Department and Electrical and Mechanical Services Department, HKSAR in February 2010.
5 2018 Scope 2 emissions were calculated based on the default factors provided by electricity providers in Hong Kong, Power Assets (0.79 CO2e kilogram/kilowatthours), CLP (0.51 CO2e kilogram/kilowatt-hours) and The Hong Kong and China Gas Company Limited (0.592 CO2e kilogram/unit).
6 Generated from stationary combustion of diesel and mobile combustion of petrol i.e. vehicle consumption

Water Consumption

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Freshwater consumption at flood prevention and sewage treatment facilities m3 2,085,560 2,050,936 2,433,500 2,191,991 2,436,440
Daily reclaimed water produced at STWs m3 1,565 1,512 1,332 1,340 1,861
Percentage of water reclaimed % 0.08 0.07 0.05 0.05 0.05

Sewage Treatment

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Volume of sewage treated Million m3 1,011 1,007 1,015 1,007 1,028
Biochemical oxygen demand (BOD) removed from sewage Tonnes 115,681 124,569 151,406 146,159 132,797
Suspended solids (SS) removed from sewage 207,738 242,933 277,232 223,165 194,751
Nitrogen removed from sewage 6,820 6,551 6,683 7,106 7,388
Dewatered sludge removed from sewage 355,220 392,396 410,526 386,137 392,140
Screenings removed from sewage 15,817 15,172 14,823 14,970 14,292
Grits removed from sewage 5,429 6,631 6,513 4,996 5,721

Waste Management (306-2)

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Construction & demolition materials5
C&D waste disposed of to landfills 000kg 6,420 6,998 5,801 2,273 2,235
C&D waste disposed of to public fill areas 000kg 238,662 235,735 170,162 155,469 151,918
Recyclable waste collected
Waste paper8 kg 28,918 19,360 20,587 15,954 20,087
Aluminium cans9 kg 30.70 19.73 29.51 32.23 92.21
Plastic bottles9 kg 43.70 20.71 18.76 22.72 52.66
7 C&D waste includes metals, paper/cardboard packaging waste, chemical waste and other wastes such as general refuse.
8 The amount of waste paper collected did not include those collected from project sites.
9 The amount of aluminium cans and plastic bottles collected did not include those collected from the Kowloon Government Offices and Western Magistracy as the data were not available.

Material consumption (301-1)

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
By DSD
Total paper consumption Reams 10,012 9,608 9,285 9,231 9,223
A4 paper Reams 9,452 9,357 8,992 8,854 8,817
A3 paper Reams 470 251 293 377 406
Purchased A4/A3 paper with recycle content Reams (% of total paper purchased) 10,012
(100%)		 9,608
(100%)		 9,285
(100%)		 9,231
(100%)		 9,223
(100%)
Paper consumed per staff (By establishment) Reams 5.3 5.0 4.8 4.8 4.6
By DSD's contractors
Rebar Tonnes Figures not available 7,165 10,643 13,325 11,811
Steel Tonnes 3,171 3,402 5,042 4,159
Bricks m3 30 5,817 1,993 126
Cement Tonnes 2,406 2,248 3,500 763
Cement mortar m3 263 640 1,946 873
Concrete m3 50,616 73,175 74,651 52,150
Sand Tonnes 12,586 24,117 23,111 2,602
Stones Tonnes 9,617 31,898 26,775 8,762
Office paper Tonnes 27 40 74 20

Greening

  Unit 2013-14 2014-15 2015-16 2016-17 2018-19
Trees Planted No. 570 2,300 10,000 1,300 64
Area of Green Roof Added m2 6,051 4,015 4,150 2,028

Social Performance

Staff

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Staff establishment (102-7) No. 1,883 1,914 1,937 1,940 1,986
Directorate No. 18 18 18 18 18
Professional No. 306 310 310 307 327
Technical & Site Supervisory No. 838 865 884 888 908
General & Common Grades No. 524 526 531 533 538
Model Scale I No. 197 195 194 194 195
Training
Training courses10 No. 624 654 674 638 681
Trainees No. 7,159 8,019 9,042 8,033 10,011
Training hours received) Hours 57,600 58,520 57,737 60,524 66,110
Average Training Hours per Staff (based on the staff strength Hours 31.8 33.0 33.4 35.0 38.4
Total expenditure on training (includes local training only)10 HK$ 4,201,000 3,585,011 3,046,283 2,929,551 2,701,879
Injury
Staff injury cases11 (403-2) No. 11 13 7 5 8
No. of sick leave for officers injured on duty Days 914.5 870.5 800.5 305.5 358.012
10 It includes internal and external seminars/workshops/training courses/visits and training courses held by CSTDI and staff-initiated external courses.
11 The definition of staff injury cases is the reported cases of occupational injuries, under Employee’s Compensation Ordinance, resulting in death or incapacity for work over 3 days.
12 The number includes sick leave days granted in 2016-17 but enjoyed in 2017-18.

Staff Breakdown in 2018-19

  Unit By Strength
No. of Staff No. 1,723
By Post
Directorate % (No.) 1.22 (21)
Professional % (No.) 17.41 (299)
Technical & Site Supervisory % (No.) 49.62 (854)
General & Common Grades % (No.) 24.84 (427)
Model Scale I % (No.) 6.91 (119)
By Employment Type
Full-time % (No.) 100 (1,723)
Part-time % 0
By Employment Contract
Permanent (Male) % (No.) 81.72 (1,408)
Permanent (Female) % (No.) 18.28 (315)
By Age
Age 20-29 % (No.) 10.8 (186)
Age 30-39 % (No.) 23.68 (408)
Age 40-49 % (No.) 26.81 (462)
Age 50-59 % (No.) 35.29 (608)
Age 60 or above % (No.) 3.42 (69)
By Ethnicity
Local % (No.) 100 (1,723)
Non-local % 0
By Gender
Male % (No.) 81.72 (1,408)
Female % (No.) 18.28 (315)

Senior Management Breakdown in 2017-18

  Unit By Strength
No. of Staff No. 8
By Age
Age 20-29 % (No.) 0
Age 30-39 % (No.) 0
Age 40-49 % (No.) 0
Age 50-59 % (No.) 62.5 (5)
Age 60 or above % (No.) 37.5 (3)
By Ethnicity
Local % (No.) 100 (8)
Non-local % (No.) 0
By Gender
Male % (No.) 100 (8)
Female % (No.) 0

Training Hours Breakdown in 2018-1913

Type of Staff No. of Staff Training Hours Received (Hours) Training Hours Per Staff (Hours)
Directorate Staff 21 1,724 82
Professional Grade Staff 299 29,493 99
Technical, Site Supervisory, General Grade and Model Scale I Staff 1,403 34,893 25
13 As there is no distinct requirement regarding receiving training in terms of gender, therefore we do not report the data broken down by gender.

Staff Turnover in 2018-1914

  Unit Male Female
Age 20-29 No. 0 0
Age 30-39 No. 2 1
Age 40-49 No. 2 0
Age 50-59 No. 6 5
Age 60 or above No. 68 6
14 The staff turnover figures exclude those General/Common Grades’ staff on inter-department transfer.

New Employee Hires in 2018-1913

  Unit Male Female
No. of New Employee Hires No. 100 27
By Age
Age 20-29 No. 36 10
Age 30-39 No. 39 13
Age 40-49 No. 15 2
Age 50-59 No. 10 2
Age 60 or above No. 0 0
15 The above figures involve staff with their 1st appointment date falling within the period from 1 April 2018 to 31 March 2019

Accident Rate (403-2)

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Number of fatalities
No. of fatalities No. 0 1 0 1 0
Construction and maintenance works carried out directly by DSD's staff No. 0 0 0 0 0
Construction and maintenance works undertaken by DSD's contractors No. 0 1 (Male) 0 1 (Male) 0
Fatal accident rate per 100,000 man-hours
Construction and maintenance works carried out directly by DSD's staff16 - 0 0 0 0 0
Construction and maintenance works undertaken by DSD's contractors16 - 0 0.011 0 0.01 0
Number of non-fatal accidents
Construction and maintenance works carried out directly by DSD's staff16 No. 11 13 7 5 8
Construction and maintenance works undertaken by DSD's contractors16 No. 18 14 8 15 6
Non-fatal accident rate per 100,000 man-hours
Construction and maintenance works carried out directly by DSD's staff16 - 0.17 0.20 0.10 0.08 0.12
Construction and maintenance works undertaken by DSD's contractors16 - 0.13 0.16 0.11 0.22 0.07
16 We currently do not collect these figures by gender.

Community Work and Charitable Contributions (203-1)

  Unit 2014-15 2015-16 2016-17 2017-18 2013-14
Total number of voluntary work hours carried out by our staff Hours 1,000 1,200 1,115 1,795 1,200
Number of voluntary projects completed No. 25 27 20 41 40
Employee fundraising HK$ thousands 73 65 53 49 40

Economic Performance

The two major types of expenses in DSD are operational expenses and public works project expenses. Our dayto-day departmental operation is financed by the General Revenue Account of the Government, while funding for public works projects are approved on a project-by-project basis by the Finance Committee of the Legislative Council. To ensure public funds are used effectively, we strive to enhance operation efficiency by adopting new technologies and management practices.

Operating Expenditure (201-1)

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Recurrent Expenditure Personal Emoluments $M 839.76 882.31 917.19 916.87 958.68
Departmental Expenses17 $M 1,286.48 1,487.83 1,646.92 1,692.80 1,774.93
Capital Account Expenditure $M 22.63 23.23 30.04 37.26 94.99
Total $M 2,148.87 2,393.37 2,594.15 2,646.93 2,828.60
17 It included expenses on Mandatory Provident Fund & Civil Service Provident Fund.

Capital Works Project Expenditure

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Value of drainage projects under planning, design and construction $M 12,975 13,983 14,445 26,876 31,935
Value of sewerage projects under planning, design and construction $M 80,483 72,402 70,093 73,175 89,220
No. of drainage projects under planning, design and construction No. 17 18 18 24 24
No. of sewerage projects under planning, design and construction No. 81 73 69 66 63

Sewage Services Operating Accounts

  Unit 2014-15 2015-16 2016-17 2017-18 2018-1918
Sewage Charge Revenue $M 955.1 1,047.0 1,161.1 1,296.2 1,323.1
Trade Effluent Surcharge Revenue $M 226.6 221.5 231.8 243.5 241.0
Other Revenue $M 45.4 48.3 45.5 45.9 50.6
Overall Revenue $M 1,227.1 1,316.8 1,438.4 1,585.6 1,614.7
Expenditure (excluding depreciation) $M (1,759.3) (2,149.2) (2,340.6) (2,334.2) (2,515.4)
Depreciation $M (839.9) (1,042.3) (1,518.2) (1,546.1) (1,547.0)
Overall Expenditure $M (2,599.2) (3,191.5) (3,858.8) (3,880.3) (4,062.4)
(Deficit) $M (1,372.1) (1,874.7) (2,420.4) (2,294.7) (2,447.7)
16 The 2018-19 figures are provisional and subject to endorsement by the Sewage Services Accounts Committee.

Sewage Services Operating Cost Recovery Rate19

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Revenue of Sewage Charge and Trade Effluent Surcharge $M 1,181.7 1,268.5 1,392.9 1,539.7 1,564.1
Expenditure (excluding depreciation) of Sewage Charge and Trade Effluent Surcharge20 $M 1,714.6 2,101.4 2,295.7 2,288.9 2,465.5
Operating Cost Recovery Rate % 68.9 60.4 60.7 67.3 63.4
19 “Miscellaneous services” are excluded from the revenues and expenditure in this table.
20 Depreciation is not recovered through the Sewage Charge and Trade Effluent Surcharge at present.

Sewage Service Charge Consumption and Payment Statistics

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Number of water accounts No.(in thousand) 2,881 2,907 2,955 2,989 3,043
Number of water accounts liable to pay sewage charge No.(in thousand) 2,663 2,689 2,735 2,765 2,818
Number of Accounts - Trade Effluent Surcharge (TES) No.(in thousand) 24 25 27 28 29

Routine Services

Number of Enquiries Received for the Past Five Years

Number of Enquiries about Sewage Services Received for the Past Five Years

Business Reclassification Applications Handled for the Past Five Years

Business Reclassification Applications Handled for the Past Five Years

Number of New TES Accounts Identified for the Past Five Years

Number of New TES Accounts Identified for the Past Five Years

Water consumption of Sewered Accounts (565 Million m3) - Customers Pattern in 2018-19

Water consumption of Sewered Accounts (565 Million m3) - Customers Pattern in 2018-19

Domestic Accounts - Sewage Charge Payment Pattern in 2018-19 (HK$/month)

Domestic Accounts - Sewage Charge Payment Pattern in 2018-19 (HK$/month)

TES Accounts - TES Payment Pattern in 2018-19 (HK$/month)

TES Accounts - TES Payment Pattern in 2018-19 (HK$/month)

Sewage Charge ($1,323 M) - Revenue Pattern by Type in 2018-19

Sewage Charge ($1,323 M) - Revenue Pattern by Type in 2018-19

Trade Effluent Surcharge ($241 M) - Revenue Pattern by Type in 2018-19

Trade Effluent Surcharge ($241 M) - Revenue Pattern by Type in 2018-19

Sewage Charge and Trade Effluent Surcharge ($1,564 M) - Revenue Pattern by Type in 2018-19

Sewage Charge and Trade Effluent Surcharge ($1,564 M) - Revenue Pattern by Type in 2018-19

Other Key Statistics

  Unit 2014-15 2015-16 2016-17 2017-18 2018-19
Flood Prevention
Total Number of Flooding Blackspots No. 10 8 7 6 6
Total Length of Stormwater Drains km 2,385 2,385 2,386 2,388 2,427
Total Length of Engineered Channels km 360 361 363 363 363
Total Length of Drainage Tunnels km 21 21 21 21 21
Total No. of Stormwater Pumping Stations No. 35 36 36 36 36
Sewage Treatment
Coverage of public sewerage (population percentage)21 93.4% 93.4% 93.5% 93.5% 93.5% 93.6%
Total length of sewerage network km 1,710 1,727 1,755 1,770 1,832
Total Length of Sewerage Network No. 42 42 63 63 63
Total no. of sewage treatment facilities No. 297 300 304 314 319
Volume of Sewage Treated Million m3 1,011 1,007 1,015 1,007 1,028
By Preliminary Treatment 228 138 45 58 75
By Primary Treatment 5 5 5 5 6
By Chemically Enhanced Primary Treatment (CEPT) 606 690 779 757 751
By Secondary Treatment 172 174 186 187 196
By Tertiary Treatment 0.14 0.14 0.17 0.17 0.16
Total Sewage Sludge Generated Daily Tonnes 958 1,048 1,121 1,043 1,075
Emission factor of GHG emissions due to electricity used for processing sewage - 0.18 0.19 0.20 0.21 0.20
21 Based on the number of domestic water bill accounts with sewage charges levied.
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[Executive Summary] [Traditional Chinese Version] [Simplified Chinese Version] [Graphical Version] [Verification Statement] [Feedback Form] [Meeting the Targets] [Key Statistics and Data] [GRI Content Index] [Sitemap]

Home | Director’s Statement | About this Report | Energy Saving and Emission Reduction Promoting Sustainable Development of Hong Kong | Highlights of the Year | Governance Approach | Our Core Responsibilities | Environmental Management | Caring for Our Staff | Stakeholder Engagement Activities | Verification Statement | Meeting the Targets | Key Statistics and Data | Feedback Form |

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