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DSD Sustainability Report 2019-20: Innovation for Sustainability of Water Purification and Flood Protection

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Appendix II   Key Statistics and Data

Environmental Performance

Energy Consumption

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

By the DSD (302-1)

Gasoline

Pool cars

GJ 1
(Litre)

825
(24,974)

627
(18,995)

599
(18,155)

379
(11,474)

533
(16,132)

AM cars

GJ 1
(Litre)

3,497
(105,901)

3,173
(96,097)

3,422
(103,615)

2,874
(87,045)

2,837
(85,928)

Electricity purchased 2

GJ 1
(Million kWh)

992,808
(275.78)

1,024,092
(284.47)

1,082,376
(300.66)

1,054,656
(292.96)

1,081,184
(300.33)

Purchased electricity consumption per unit volume of sewage treated

kWh

0.27

0.28

0.30

0.28

0.29

Total equivalent electricity generated from renewable energy sources 3

Million kWh

34.68

21.70

28.15

28.50

27.96

Biogas 4

Million m3

10

7

9

8

9

By the DSD's Contractors (302-2)

Gasoline

GJ 1
(Litre)

6,834
(187,239)

4,473
(135,461)

4,525
(137,045)

4,035
(122,186)

5,191
(157,208)

Diesel

GJ 1
(Litre)

42,601
(1,167,162)

12,540
(343,571)

16,566
(454,411)

39,106
(1,071,408)

67,626
(1,855,021)

Electricity

GJ 1
(Million kWh)

97,798
(27.17)

56,616
(15.73)

16,480
(4.58)

22,693
(6.30)

14,808
(4.11)

1. Conversion factors for standardising units to GJ are gasoline (0.033 GJ/L), diesel (0.036 GJ/L), electricity (0.0036 GJ/kWh). Since different conversion factors are adopted in estimation methods, the significant figure of energy consumption are slightly different.
2. The total electricity consumption includes the offices at Kowloon Government Offices, Western Magistracy, and the DSD's flood prevention and sewage treatment facilities (including sewage treatment works, sewage pumping stations and stormwater pumping stations). Electricity consumption at office at Revenue Tower is not applicable.
3. The renewable energy sources harnessed by the DSD include hydropower, solar power and biogas.
4. Generated from sewage treatment works.

 

Greenhouse Gas (GHG) Emissions 5

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

By the DSD

Electricity purchased (Scope 2) 6 (305-2)

 

 Tonnes CO2e

193,046

199,129

210,462

205,072

210,230

Gasoline Combustion (Scope 1) (305-1)

Pool Cars

Tonnes CO2e

65.90

44.83

42.85

27.08

38.07

AM Cars

 Tonnes CO2e

249.93

226.79

244.53

205.43

202.79

By the DSD's Contractors (305-3)

Electricity purchased (Scope 3)

 Tonnes CO2e

19,016

11,009

19,019

4,412

2,879

Fuel consumption (Scope 3) 7

 Tonnes CO2e

3,561

1,218

1,511

3,089

4,749

5. 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. Types of GHG include CO2, CH4 and N2O.
6. Scope 2 GHG emissions were calculated based on a territory-wide default value of 0.7 kg/kWh.
7. Generated from stationary combustion of diesel and mobile combustion of petrol i.e. vehicle consumption. GHG emissions from vehicle consumption by the DSD's contractors was calculated based on the assumption that all vehicles were passenger cars that consume gasoline. The DSD will continue optimising the data collection method to enhance data accuracy.

 

Water Consumption 8  (301-1, 303-3, 303-5)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Freshwater consumption at flood prevention and sewage treatment facilities

m3

2,050,936

2,433,500

2,191,991

2,436,440

2,525,919

Daily reclaimed water produced at sewage treatment facilities

m3

1,512

1,332

1,340

1,861

1,576

Percentage of reclaimed water used

%

0.07

0.05

0.05

0.08

0.06

8. Freshwater and reclaimed water consumed by the DSD are renewable materials.

 

Sewage Treatment 
 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Volume of sewage treated (102-7)

Million m3

1,007

1,015

1,007

1,028

1,033

Biochemical oxygen demand removed from sewage

Tonnes

124,569

151,406

146,159

132,797

132,089

Suspended solids removed from sewage

242,933

277,232

223,165

194,751

207,672

Nitrogen removed from sewage

6,551

6,683

7,106

7,388

7,084

Dewatered sludge removed from sewage

392,396

410,526

386,137

392,140

381,045

Screenings removed from sewage

15,172

14,823

14,970

14,292

12,842

Grits removed from sewage

6,631

6,513

4,996

5,721

4,981

 

Waste Management 9 (306-3)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Construction and Demolition (C&D) Materials

C&D waste disposed to landfills 10

'000kg

6,998

5,801

2,273

2,335

6,188

C&D waste disposed to public fill areas 11

'000kg

235,735

170,162

155,469

151,918

68,491

Recyclable Waste Collected

Waste paper 12

kg

19,360

20,587

15,954

20,087

15,083

Aluminium cans 13

kg

19.73

29.51

32.23

92.21

86.76

Plastic bottles 13

kg

20.71

18.76

22.72

52.66

45.53

9. The DSD centrally collects waste data from different divisions and contractors.
10. Waste includes metals, plastics, paper/cardboard packaging waste and other wastes, such as general refuse.
11. Waste include bricks, concrete, building debris, rubble and excavated soil.
12. The amount of waste paper collected did not include those collected from project sites.
13. The amount of aluminium cans and plastic bottles collected did not include those collected from the Western Magistracy as the data were not available.

 

Material Consumption 14 (301-1)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

By the DSD

Total paper consumption

Reams

9,608

9,285

9,231

9,223

9,091

A4 paper

9,357

8,992

8,854

8,817

8,726

A3 paper

251

293

377

406

365

Purchased A4/A3 paper with recycle content

Reams

(% of total paper purchased)

9,608
(100%)

9,285
(100%)

9,231
(100%)

9,223
(100%)

9,091
(100%)

Paper consumed per staff (By establishment)

Reams

5.0

4.8

4.8

4.6

4.5

By the DSD's contractors

Rebar

Tonnes

7,165

10,643

13,325

11,811

14,998

Steel

Tonnes

3,171

3,402

5,042

4,159

9,843

Bricks

m3

30

5,817

1,993

126

140

Cement

Tonnes

2,406

2,248

3,500

763

2,181

Cement mortar

m3

263

640

1,946

873

812

Concrete

m3

50,616

73,175

74,651

52,150

57,418

Sand

Tonnes

12,586

24,117

23,111

2,602

6,857

Stones

Tonnes

9,617

31,898

26,775

8,762

6,326

Office paper

Tonnes

27

40

74

20

66

 14. Except for paper, which is a renewable material, others are non-renewable materials.

 

Greening 

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Total no. of trees planted

Tree

2,300

10,000

1,300

64

239

Area of green roof added

m2

4,015

4,200

4,150

2,028

7,359

 

Social Performance

Staff

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Staff establishment (102-7)

No.

1,914

1,937

1,940

1,986

2,020

Directorate

No.

18

18

18

18

18

Professional

No.

310

310

307

327

346

Technical & Site Supervisory

No.

865

884

888

908

920

General & Common Grades

No.

526

531

533

538

540

Model Scale I

No.

195

194

194

195

196

Training

Training courses 15

No.

654

674

638

681

600

Trainees

No.

8,019

9,042

8,033

10,011

6,873

Training hours received

Hours

58,520

57,737

60,524

66,110

58,781

Average training hours per staff

(Based on the staff strength)

Hours

33.0

33.4

35.0

38.4

33.9

Total expenditure on training (Includes local training only) 15

$

3,585,011

3,046,283

2,929,551

2,701,879

3,772,082

15. It includes internal and external seminars, workshops, training courses, visits and training courses held by Civil Service Training and Development Institute and staff-initiated external courses.

 

Staff Breakdown in 2019-2016 16 (102-8)

 

Unit

By Strength

No. of Staff

No.

1,736

By Post

Directorate

%（No.）

1.04 (18)

Professional

18.78 (326)

Technical & Site Supervisory

49.14 (853)

General & Common Grades

23.44 (407)

Model Scale I

7.60 (132)

By Employment Type

Full-time

%（No.）

100 (1,736)

Part-time

0 (0)

By Employment Contract, by Gender

Permanent (Male)

%（No.）

80.93 (1,405)

Permanent (Female)

19.07 (331)

By Age

Age 20-29

%（No.）

12.04 (209)

Age 30-39

25.12 (436)

Age 40-49

28.00 (486)

Age 50-59

31.51 (547)

Age 60 or above

3.34 (58)

By Nationality

Local

%（No.）

100 (1,736)

Non-local

0 (0)

16. The majority of our operations are performed by the DSD's employees.

 

Senior Management Breakdown in 2019-20 (405-1)

 

Unit

By Strength

No. of Staff

No.

7

By Age

Age 20-29

%（No.）

0 (0)

Age 30-39

%（No.）

0 (0)

Age 40-49

%（No.）

0 (0)

Age 50-59

%（No.）

71.43 (5)

Age 60 or above

%（No.）

28.57 (2)

By Nationality

Local

%（No.）

100 (7)

Non-local

%（No.）

0 (0)

By Gender

Male

%（No.）

100 (7)

Female

%（No.）

0 (0)

 

Training Hours Breakdown in 2019-2017 17 (404-1)

Type of Staff

No. of Staff 
(By Strength)

Training Hours Received (Hours)

Training Hours per Staff (Hours)

Directorate Staff

18

1,366

75.89

Professional Grade Staff

326

26,507

81.31

Technical, Site Supervisory, General & Common Grades and Model Scale I Staff

1,392

30,908

22.20

17. As there is no distinct requirement regarding receiving training in terms of gender, therefore we do not report the data broken down by gender.

 

New Employees and Staff Turnover in 2019-20 (404-1)

 

New Employee 18

Staff Turnover 19

 

Unit

Male

Female

Male

Female

By Age

 

 

Age 20-29

No.

51

13

3

1

Age 30-39

No.

39

14

2

1

Age 40-49

No.

12

5

9

0

Age 50-59

No.

7

0

0

2

Age 60 or above

No.

0

0

59

10

18. The above figures involve staff with their 1st appointment date falling within the period from 1 April 2019 to 31 March 2020.
19. The staff turnover figures exclude staff on inter-departmental transfer.

Community Work and Charitable Contributions (203-1)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Total number of voluntary work hours carried out by our staff

Hours

1,200

1,115

1,795

1,200

1,332

Number of voluntary projects completed

No.

27

20

41

40

39

Employee fundraising

$ '000

65

53

49

40

65
Occupational Safety and Health (403-9)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Number of fatalities

Number of fatalities

No.

1

0

1

0

0

The DSD staff

0

0

0

0

0

Construction and maintenance works undertaken by the DSD's contractors

1

(Male)

0

1

(Male)

0

0

Fatal accident rate per 200,000 man-hours

The DSD staff

-

0

0

0

0

0

Construction and maintenance works undertaken by the DSD's contractors

-

0.022

0

0.02

0

0

Number of Non-fatal Accidents

The DSD staff

No.

13

7

5

8

5

Construction and maintenance works undertaken by the DSD's contractors

No.

14

8

15

6

10

Non-fatal accident rate per 200,000 man-hours

The DSD staff

-

0.40

0.20

0.16

0.24

0.16

Construction and maintenance works undertaken by the DSD's contractors

-

0.32

0.22

0.44

0.18

0.28

 

 

Unit

2019-20

Total hours worked

The DSD staff

Hours

6,237,200

Construction and maintenance works undertaken by the DSD's contractors

7,245,997

 

Economic Performance

The two major types of expenses in the DSD are operational expenses and public works project expenses. Our day-to-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

2015-16

2016-17

2017-18

2018-19

2019-20

Recurrent Expenditure

Personal Emoluments

$M

882.31

917.19

916.87

958.68

1,009.37

Departmental Expenses 20

$M

1,487.83

1,646.92

1,692.80

1,774.93

1,869.07

Capital Account Expenditure

$M

23.23

30.04

37.26

94.99

81.12

Total

$M

2,393.37

2,594.15

2,646.93

2,828.60

2,959.56

20. It included expenses on Mandatory Provident Fund and Civil Service Provident Fund.

 

Capital Works Project Expenditure (203-1)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20 21

No. of drainage projects under planning, design and construction

No.

18

18

24

24

{2}
[24]

Value of drainage projects under planning, design and construction

$M

13,983

14,445

26,876

31,935

{1,345}
[34,758]

No. of sewerage projects under planning, design and construction

No.

73

69

66

63

{21}
[44]

Value of sewerage projects under planning, design and construction

$M

72,402

70,093

73,175

89,220

{27,031}
[77,608]

21. Figures in { } are Category A projects under construction and the amount shown in money-of-the-day price; figures in [ ] are Category B projects under planning or design and amount shown in March 2020 price level.

 

Sewage Services Operating Accounts (102-7)

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20 22

Sewage Charge Revenue

$M

1,047.0

1,161.1

1,296.2

1,323.1

1,154.1

Trade Effluent Surcharge Revenue

$M

221.5

231.8

243.5

241.0

154.4

Other Revenue

$M

48.3

45.5

45.9

 50.6

52.4

Overall Revenue

$M

1,316.8

1,438.4

1,585.6

 1,614.7

1,455.6

Expenditure (Excluding Depreciation)

$M

(2,149.2)

(2,340.6)

(2,334.2)

 (2,515.4)

(2,615.5)

Depreciation

$M

(1,042.3)

(1,518.2)

(1,546.1)

 (1,547.0)

(1,631.4)

Overall Expenditure

$M

(3,191.5)

(3,858.8)

(3,880.3)

 (4,062.4)

(4,246.9)

(Deficit)

$M

(1,874.7)

(2,420.4)

(2,294.7)

 (2,447.7)

(2,791.3)

22. The 2019-20 figures are provisional and subject to endorsement by the Sewage Services Accounts Committee.

 

Sewage Services Operating Cost Recovery Rate 23

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Revenue of Sewage Charge and Trade Effluent Surcharge

$M

1,268.5

1,392.9

1,539.7

1,564.1

1,308.5

Expenditure (excluding depreciation) of Sewage Charge and Trade Effluent Surcharge 24

$M

2,101.4

2,295.7

2,288.9

2,465.5

2,563.8

Operating Cost Recovery Rate

%

60.4

60.7

67.3

63.4

54.7 25

23. “Miscellaneous services” are excluded from the revenues and expenditure in this table.
24. Depreciation is not recovered through the Sewage Charge and the Trade Effluent Surcharge at present.
25. The figure reflects the waiver to sewage treatment from December 2019 to March 2020. Operating cost recovery rate before waiver was 61.8%.

 

Sewage Service Charge Consumption and Payment Statistics

 

2015-16

2016-17

2017-18

2018-19

2019-20

Number of water accounts (in thousand)

2,907

2,955

2,989

3,043

3,078

Number of water accounts liable to pay Sewage Charge (in thousand)

2,689

2,735

2,765

2,818

2,853

Number of accounts - Trade Effluent Surcharge (in thousand)

25

27

28

29

30

 

Routine Services

Number of Enquiries Received for the Past Five Years. Telephone enquiries, 2015-16: 6 000; 2016-17: 5 422; 2017-18: 3 706; 2018-19: 2 900; 2019-20: 2 342. Written enquiries, 2015-16: 719; 2016-17: 787; 2017-18: 773; 2018-19: 568; 2019-20: 311

Business Reclassification Applications Handled for the Past Five Years. 2015-16: 230; 2016-17: 186; 2017-18: 121; 2018-19: 117; 2019-20: 61

Number of New TES Accounts Identified for the Past Five Years. 2015-16: 1 462; 2016-17: 1 195; 2017-18: 1 050; 2018-19: 848; 2019-20: 574

Water consumption of Sewered Accounts (507 million m3) - Customers Pattern in 2019-20. Domestic: 68%; Restaurants: 12.9%; Other Non-domestic: 12.4%; Government: 4.4%; Food Manufacturing: 1.3%; Laundries: 0.8%; Textiles & Wearing Apparel except Footwear: 0.1%; Breaching & Dyeing: 0.1%

Domestic Accounts - Sewage Charge Payment Pattern in 2019-20. $0: 14.1%; $0.1-$22.6: 41.8%; $22.6-$36.5: 20.6%; $36.5-$78.8: 20.8%; $78.8: 2.7%

Trade Effluent Surcharge Accounts - TES Payment Pattern in 2019-20. $0-$100: 33.5%; $101-$1,001: 48.5%; $1,001-$5,000: 15.9%; >$5,001: 2.1%

Sewage Charge ($1.154 billion) - Revenue Pattern by Type in 2019-20. Domestic: 64.6%; Restaurants: 11.4%; Other Non-domestic: 15.4%; Government: 5.6%; Food Manufacturing: 1.8%; Laundries: 1%; Textiles & Wearing Apparel except Footwear: 0.1%; Breaching & Dyeing: 0.1%

26. The figures are provisional and subject to endorsement by the Sewage Services Accounts Committee.

Trade Effluent Surcharge ($154 million) - Revenue Pattern by Type in 2019-20. Restaurants: 89.4%; Food Manufacturing: 9; Others: 1.4%; Textiles & Wearing Apparel except Footwear: 0.1%; Breaching & Dyeing: 0.1%

27. The figures are provisional and subject to endorsement by the Sewage Services Accounts Committee.

Sewage Charge and Trade Effluent Surcharge ($1.3085 billion) - Revenue Pattern by Type in 2019-20. Domestic: 57%; Restaurants: 20.6%; Other Non-domestic: 13.7%; Government: 4.9%; Food Manufacturing: 2.6%; Laundries: 1%; Textiles & Wearing Apparel except Footwear: 0.1%; Breaching & Dyeing: 0.1%

27. The figures are provisional and subject to endorsement by the Sewage Services Accounts Committee.

 

Other Key Statistics

 

Unit

2015-16

2016-17

2017-18

2018-19

2019-20

Flood Prevention

Total no. of flooding blackspots

No.

8

7

6

6

5

Total length of stormwater drains

km

2,385

2,386

2,388

2,427

2,429

Total length of engineered channels

km

361

363

363

363

363

Total length of drainage tunnels

km

21

21

21

21

21

Total no. of stormwater pumping stations

No.

36

36

36

36

36

Sewage Treatment

Coverage of Public Sewerage (Population Percentage) 28

%

93.5

93.5

93.5

93.6

93.7

Total length of sewerage network

km

1,728

1,755

1,770

1,832

1,841

Total length of sewage tunnels

km

42

63

63

63

63

Total no. of sewage treatment facilities

No.

300

304

314

319

324

Total volume of sewage treated

Million m3

1,007

1,015

1,007

1,028

1,033

By Preliminary Treatment

138

45

58

75

50

By Primary Treatment

5

5

5

6

5

By Chemically Enhanced Primary Treatment

690

779

757

751

784

By Secondary Treatment

174

186

187

196

194

By Tertiary Treatment

0.14

0.17

0.17

0.16

0.17

Total sewage sludge generated daily

Tonnes

1,048

1,121

1,043

1,075

1,041

Emission factor of GHG emissions due to electricity used for processing sewage

-

0.19

0.20

0.21

0.20

0.20

28. Based on the number of domestic water bill accounts with sewage charges levied.

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