2.1 organisation chart 2.2 staff establishment · sewage treatment works from 70,000 m 3 to 150,000...

Vision, Mission and Values

Organisation2.1 Organisation Chart2.2 Staff Establishment

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Financial Data3.1 Operating Expenditure3.2 Sewage Services Operating Cost Recovery Rate3.3 Sewage Charge3.4 Estimated Expenditure for Capital Works Projects

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Work Overview 4.1 Sewage Treatment4.2 Flood Prevention4.3 Operations and Maintenance4.4 Rehabilitation and Replacement of Stormwater Drains and Sewers

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Utilisation of RenewableEnergy

Key Statistics and Data

Public Education

Contact Us

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Contents

Drainage Services Department in Brief 2018-19

1. Our Vision, Mission and Values

Vision

To provide world-class wastewater and stormwater drainage services enabling the sustainable development of Hong Kong

Mission

Values

● Improving drainage services in a cost-effective and environmentally responsible manner

● Enhancing a caring, harmonious, safe and healthy work environment that fosters staff development and a mindset for change

● Strengthening relationships with community, industry and worldwide counterparts

● Customer Satisfaction

● Quality

● Commitment

● Teamwork

2

2. Organisation2.1 Organisation Chart

DSD HEADQUARTERSDirector of Drainage

Services

Deputy Director of Drainage Services

Assistant Director /

Projects and Development


Operations and Maintenance


Electrical and Mechanical

Assistant Director / Sewage Services

Sewerage Projects Division

Drainage Projects Division

Consultants Management

Division

Project Management

Division

Projects and Development

Branch

Hong Kong and Islands

Division

Mainland South

Division

Mainland North

Division

Land Drainage Division

Operations and Maintenance

Branch

Harbour Area Treatment

Scheme Division Customer Services

and Asset Management

Section

Operation Section

Sewage Revenue Section

Sewage Services Branch

Sewage Treatment Division 1

Sewage Treatment Division 2


Projects Division


Branch

3


Directorate 18

Professional 327

Engineer 255Electrical & Mechanical Engineer 48Electronics Engineer 2Shift Charge Engineer 2Quantity Surveyor 1Land Surveyor 2Landscape Architect 2Environmental Protection Officer 3Chemist 12

Technical & Site Supervisory 908

General & Common Grades 538

Model Scale I 195

Total 1,986

2.2 Staff Establishment

4

Recurrent Expenditure 2016-17 2017-18 2018-19Personal Emoluments andPersonnel Related Expenses 950.1 955.9 1,004.6

Departmental Expenses 1,614.0 1,653.8 1,729.0

Total 2,564.1 2,609.7 2,733.6

2016-17 2017-18 2018-19 (2)

Revenue of Sewage Charge and Trade Effluent Surcharge ($M)

1,392.9 1,539.7 1,551.2

Expenditure of Sewage Charge and Trade Effluent Surcharge ($M) (1)

2,295.7 2,288.9 2,503.1

Operating Cost Recovery Rate (%) 60.7 67.3 62.0

(in $M)

3. Financial Data

3.1 Operating Expenditure

3.2 Sewage Services Operating Cost Recovery Rate

Notes:

1. Depreciation is not recovered through the Sewage Charge and Trade Effluent Surcharge at present

2. The figures for 2018-19 are estimated and the actual figures will be finalised by 2019 Q4

5


2016 2017 2018Sewage Charge Account 2,724 2,760 2,806

Trade Effluent Surcharge (TES) Account

27 28 29

Number of Accounts

3.3 Sewage Charge

(in thousand, as at December 31 of each year)

Projectsin hand

Sewage Treatment

Flood Prevention Total

No. Cost ($B) No. Cost

($B) No. Cost ($B)

Cat. A (1) 22 16.3 1 1.2 23 17.5

Cat. B (2) 41 72.9 19 28.7 60 101.7

Total 63 89.2 20 30.0 83 119.2

3.4 Estimated Expenditure for Capital Works Projects

1. All Cat. A projects with works/consultancies in progress are given in Money-of-the-Day price

2. All Cat. B projects are given in September 2018 price level

Notes:

The sewage services charges are composed of Sewage Charge and Trade Effluent Surcharge. There are currently 27 trades required to pay the Trade Effluent Surcharge. Since 1 April 2017, the unit rate of Sewage Charge per cubic metre of water supplied remains at $2.92.

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4. Work Overview

4.1 Sewage Treatment

Services for sewage treatment include operation and maintenance of sewage treatment facilities, upgrading the existing facilities and building new facilities.

Sewerage Master Plan StudiesThe regional sewerage infrastructures are mainly proposed under the 16 Sewerage Master Plans (SMPs) and the subsequent 8 SMP Reviews.

Stanley Sewage Treatment Works

7


Harbour Area Treatment SchemeHarbour Area Treatment Scheme (HATS) is one of the most important infrastructure programme undertaken by the Government to improve the water quality of Victoria Harbour, and thus enhancing the sustainable development of Hong Kong.

Layout Plan of HATS

Stonecutters Island Sewage Treatment Works

Sai Ying Pun

8

Tunnel Drive Length (km) Size Level

(mPD)Chai Wan to Shau Kei Wan 2.3 Circular tunnel of

cross-sectional area 1.13 m2 -121 to -126

Shau Kei Wan to Kwun Tong 2.6 Circular tunnel of


Tseung Kwan O to Kwun Tong 5.3 Twin circular tunnels of cross-

sectional area 1.43 m2 each -76 to -87

Kwun Tong to To Kwa Wan 3.4 Circular tunnel of


To Kwa Wan to Stonecutters Island 5.6 Circular tunnel of


Kwai Chung to Tsing Yi 0.8 Circular tunnel of cross-sectional area 3.84 m2 -132 to -134

Tsing Yi to Stonecutters Island 3.6 Circular tunnel of


Information of Sewage Conveyance Tunnel

Commissioning Date: December 2001Project Cost: About $8.2 B

Harbour Area Treatment Scheme Stage 1 Project Scope:● Constructing Stonecutters Island Sewage Treatment Works

(SCISTW) at a footprint of about 10 hectares and a design treatment capacity of 1.7 million m3 per day

● Constructing about 23-km-long deep tunnel to convey the sewage from Kowloon and the north-eastern part of Hong Kong Island to SCISTW for chemically enhanced primary treatment (CEPT)

● Upgrading 7 Preliminary Treatment Works (PTW) in Tsing Yi, Kwai Chung, To Kwa Wan, Kwun Tong, Tseung Kwan O, Shau Kei Wan and Chai Wan

9


Information of Sewage Conveyance Tunnel

Project Scope:

● Enhancing the design treatment capacity of SCISTW to 2.45 million m3 per day and the addition of disinfection facilities

● Constructing about 21-km-long deep tunnel to convey the sewage from the northern and south-western parts of Hong Kong Island to SCISTW for CEPT

● Upgrading 8 existing PTWs in North Point, Wan Chai East, Central, Sandy Bay, Cyberport, Wah Fu, Aberdeen and Ap Lei Chau

Commissioning Date: December 2015Project Cost: About $17.5 B

Harbour Area Treatment Scheme Stage 2A

Tunnel Drive Length (km) Size Level

(mPD)

North Point to Stonecutters Island

12

● 7.5-km-long twin oval tunnels of cross-sectional area 1.7 to 5.6 m2 each

● 4.5-km-long single circular tunnel of cross-sectional area 7.1 m2

-139to

-163

Aberdeen toSai Ying Pun 7.5

Twin oval tunnels of cross-sectional area 1.5 to 2.1 m2

each

-73 to -123

Ap Lei Chau to Aberdeen 1.3 Twin circular tunnels of cross-

sectional area 0.28 m2 each+2 to -99

10

Harbour Area Treatment Scheme Stage 2B

Project Scope:● Uplifting the treatment capacity of the secondary sewage

treatment works at Mui Wo to 3,700 m3 per day

● Upgrading the sludge treatment and deodourisation facilities, and landscaping and greening of the sewage treatment works

Completion Date: April 2018Project Cost: About $967 M

Upgrading of Mui Wo Sewage Treatment Works

Mui Wo Sewage Treatment Works

HATS Stage 2B involves construction of biological sewage treatment facilities on Stonecutters Island for all HATS flow. It is kept under review taking into account the water quality situation and the latest technological development in biological treatment.

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Project Scope:● Expanding and upgrading the preliminary sewage

treatment works to chemically enhanced primary treatment with disinfection to improve the effluent quality

● Uplifting the treatment capacity to 200,000 m3 per day

● Constructing ancillary facilities such as administration bui ld ing, maintenance workshop, laborator ies, odour treatment facilities, sludge treatment facilities, architectural and landscaping works

Upgrading of San Wai Sewage Treatment Works

Project Progress:

Project Cost: About $3.14 B

The Design, Build and Operate Contract commenced in May 2016 and targeted for completion of construction in 2020. The Contractor is responsible for design and construction of the San Wai Sewage Treatment Works, and operation of the facilities for 15 years after commissioning.

Illustration of the completed San Wai Sewage Treatment Works

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Illustration of the completed Kwun Tong Sewage Pumping Station

Project Scope:● Enhancing Kwun Tong Sewage Pumping Station to

provide a balancing facility with a capacity of 16,000 m3 and its associated facilities

● Providing a plant house with ventilation system and landscaped deck at the roof

● Providing deodourisation facilities and ancillary works

Enhancement Works for Kwun Tong Sewage Pumping Station

Project Progress:The works commenced in December 2017 and targeted for completion in 2022.


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Project Scope:● Reconstructing the existing secondary sewage treatment

works at Sha Tau Kok to increase its capacity to 5,000 m3 per day

● Constructing approximately 1.7 km of submarine outfall with diameter 450 mm

● Decommissioning the existing sewage pumping station and associated rising mains

Project Progress: The works commenced in November 2018 and targeted for completion in 2025.

Expansion of Sha Tau Kok Sewage Treatment Works, Phase 1


Illustration of the completed Phase 1 Sha Tau Kok Sewage Treatment Works

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Project Scope:● Uplifting the treatment capacity of existing Shek Wu Hui

Sewage Treatment Works from 93,000 m3 to 190,000 m3 per day in phases

● Upgrading the sewage treatment level from existing secondary to tertiary

● Improving environmental performance of the existing plant, including odour control and landscaping works

Shek Wu Hui Effluent Polishing Plant

Preliminary design layout of Shek Wu Hui Effluent Polishing Plant

Project Progress:The Advance Works commenced in mid-2015 and are anticipated to be completed in 2019 Q4. The Main Works will be implemented in three phases with Phase 1 starting in 2019 Q3 targeting for completion of the final phase by 2034.

Project Cost: About $500 M (for Advance Works, Investigation and Design)About $13.2 B (for Main Works)

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Project Scope:Relocating Sha Tin Secondary Sewage Treatment Works to caverns inside Nui Po Shan for handling sewage treatment capacity up to 340,000 m3 per day. The existing site will then be vacated for beneficial uses.

Project Progress: Stage 1 Works includes site preparation and access tunnel construction commenced in February 2019. The remaining construction works will be implemented in stages. The total construction period of the project was estimated to be 13 years.

Relocation of Sha Tin Sewage Treatment Works to Caverns

Project Cost of Stage 1 Works: About $2.08 B

Sha Tin Sewage Treatment Works and Future Cavern Sewage Treatment Works

Future Cavern Sewage Treatment Works Existing Sha Tin

Sewage Treatment Works

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Project Scope:● Uplifting the treatment capacity of existing Yuen Long

Sewage Treatment Works from 70,000 m3 to 150,000 m3 per day

● Upgrading the sewage treatment level from existing secondary to tertiary to protect the water quality in Deep Bay

● Improving environmental performance of the existing plant, including odour control and landscaping works

Yuen Long Effluent Polishing Plant

Project Cost of Stage 1 Works:

About $6.8 B

Project Progress: The upgrading works will be implemented in 2 stages. Subject to funding approval, the construction of Stage 1 Works is scheduled for commencement in 2020 and targeted for completion in 2027.

Preliminary design layout of Yuen Long Effluent Polishing Plant

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Project Progress: Subject to funding approval, the works will commence in 2020 and target for completion in 2025.

Project Progress: Subject to funding approval, the works will commence in 2020 and target for completion in 2027.

Upgrading of Cheung Chau Sewage Treatment Works

Upgrading of West Kowloon and Tsuen Wan Sewerage – Phase 2

Project Cost:

About $2.67 B

Project Cost:

About $2.29 B

Project Scope:● Increasing the treatment capacity of Cheung Chau Sewage

Treatment Works to 9,800 m3 per day

● Upgrading the sewage treatment level from primary to secondary

Project Scope:● Constructing approximately 33.5 km of gravity sewers

● Providing internal lining at 28 existing sewer crossings within stormwater box culverts

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4.2 Flood Prevention

Study Area Status1 Yuen Long and North District Completed in 20112 West Kowloon

Completed in 20153 East Kowloon4 Tai Po

Completed in 20175 Sha Tin and Sai Kung6 Northern Hong Kong Island(1) Completed in 20197 Lantau and Outlying Islands

In progress, anticipatedto complete in 20208 Tuen Mun, Tsuen Wan and

Kwai Tsing9 Tseung Kwan O

Under planning10 South Hong Kong Island(2)

Drainage Master Plan (DMP) Review StudiesSince 2008, DSD has commenced a series of DMP Review Studies and Drainage Studies, which are summarised as follows:

Stormwater drainage services include implementation of flood prevention works, operation and maintenance of stormwater drains and associated facilities.

DMP Review Studies

1. The drainage study for Happy Valley was completed in 2011 2. The drainage study for Repulse Bay and Tai Tam is in progress and

anticipated to be completed in 2020

Notes:

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Since 1995, DSD has eliminated 125 flooding blackspots. There are currently 6 flooding blackspots in Hong Kong. The drainage improvement works for 2 of them have been completed and their effectiveness is being monitored. Subject to satisfactory performance, these 2 flooding blackspots will be eliminated in due course. For the remaining 4 flooding blackspots, the first-stage improvement works have been completed while the next stage improvement works are under planning and design.

Location Situation

● Ting Kok Road – Shuen Wan Chim Uk to Wong Yue Tan, Tai Po

● Morrison Hill Road J/O Lap Tak Lane, Wan Chai

Improvement works have been completed and the effectiveness is under monitoring

● Lam Tsuen Valley Basin, Tai Po● Shek Wu Wai, San Tin, Yuen Long● Chatham Road South between Granville Road and Austin Avenue,

Yau Tsim Mong● Pok Fu Lam Village, Southern

First-stage improvementworks have been completed. Works for the next stage are under planning and design

Information of the 6 Flooding Blackspots

Elimination of Flooding Blackspots

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Based on passage of typhoons in the past, DSD has identified 7 Storm Surge Spots, which are vulnerable to seawater inundation due to rise of sea level caused by storm surge, and 3 Overtopping Wave Spots, which are vulnerable to flooding due to wave overtopping the seawall. DSD is formulating and progressively implementing measures to combat the problems with other departments.

1. Tai O2. Tuen Mun Luen On San Tsuen3. Tuen Mun Kar Wo Lei4. Sham Tseng San Tsuen

1. Tseung Kwan O South 2. Heng Fa Chuen3. South Horizons

5. Lei Yue Mun6. Sai Kung Nam Wai7. Yuen Long North West Low-lying Coastal Area

Storm Surge Spots and Overtopping Wave Spots

Storm Surge Spots

Overtopping Wave Spots

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Completed Under planning / design / construction

River Training About 108 km About 12 km

Drainage Improvement About 94 km About 32 km

Drainage Tunnel About 21 km 3 km

Stormwater Storage Scheme 4 11

Total Project Cost About $29.6 B About $30.0 B

Flood Prevention Works

Happy Valley Underground Stormwater Storage Tank

Our flood prevention works are summarised as follows:

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Tai Hang Tung

Stormwater Storage Scheme

Sheung Wan


Happy Valley Underground Stormwater

Storage Scheme

On Sau Road


Project Cost About$290 M

About$200 M

About$1.07 B

About $60 M

CommissioningDate 2004 2009 2017 2018

Capacity 100,000 m 3 9,380 m 3 60,000 m 3 18,000 m 3

Design PumpingCapacity

1.9 m 3 /s 6.0 m 3 /s 1.5 m 3 /s By gravity

Plan Area 17,680 m 2 1,580 m 2 24,000 m 2 4,700 m 2

Average Internal Depth 7.5 m 5.9 m 3 m 4.6 m

Other Features240 m long overflow weir in total

—15 nos. of 3 m long movable overflow weir

—

Stormwater Storage Schemes

Kai Tak Transfer Scheme

Hong Kong West Drainage

Tunnel

Lai Chi Kok Drainage Tunnel

Tsuen WanDrainage Tunnel

Project Cost About$380 M

About$3.38 B

About$1.67 B

About$1.49 B

Commission-ing Date 2004 2012 2012 2013

Length 1.5 km 10.5 km 3.7 km 5.1 kmDiameter 4.4 m 6.25 m to 7.25 m 4.9 m 6.5 mOther Features — ● 34 intake

structures ● Outfall at Cyberport

● 6 intake structures● 1 stilling basin● Outfall at Stonecutters Island

● 3 intake structures● Outfall at

Yau Kom Tau

Drainage Tunnels

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District Village District Village

Yuen Long

Kau Hui (Nam Pin Wai) Kam Tin Sha Po Tsuen

Ma Tin Tsuen Ngau Tam Mei

Po Wai

Shui Pin Wai Chuk Yuen Tsuen and Ha San Wai

Wang Chau Village

San Tin

Chau Tau

Shui Pin Tsuen Mai Po Lo Wai and Mai Po San Tsuen

Tai Kiu San Tin

Tin Shui Wai

Lo Uk Tsuen Sheung Shui

Sheung Shui Tsuen

Sik Kong Tsuen Tai Tau Leng and Tsung Pak Long

Sik Kong WaiSha Tin

Tsang Tai Uk

Kiu Tau Wai Fo Tan

Ha Mei San Tsuen Tai Po Shui WaiSheung Cheung Wai Tuen Mun Tsing Chung Koon

Fung Shui Lane Lantau Island

Tai O Wing On Street

Tai O Tai Ping Street

Village Flood Protection Schemes 27 Village Flood Protection Schemes in operation

Illustration of Village Flood Protection Scheme

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Stage I to Stage III Stage IV

Project Scope

Straightening the Lok Ma Chau bend and the Liu Pok bend, widening and deepening the remaining sections from Liu Pok bend to the estuary and the section upstream of the Liu Pok bend to the confluence with Ping Yuen River (about 13.5 km in total)

Improving the section of Shenzhen River between Ping Yuen River and Pak Fu Shan (about 4.5 km) and constructing a flood retention lake of 80,000 m3

Completion Date 1997 to 2006 2017

Project Cost About $1.8 B About $0.84 B

Shenzhen River Regulation Project

Shenzhen River Regulation Project Stage IVFlood Retention Lake

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Inter-reservoirs Transfer Scheme

Constructing a water tunnel of about 2.8 km with 3 m diameter from the Kowloon Byewash Reservoir to the Lower Shing Mun Reservoir with a view to achieving dual purposes in flood protection and water conservation.

Project Progress: The works commenced in February 2019 and targeted for completion in 2022.


West Kowloon Drainage Improvement – Inter-reservoirs Transfer Scheme

Project Scope:

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Revitalising Water Bodies The way forward: Revitalising Water Bodies to Achieve Sustainable Development

Promoting water-friendly culture and activities Creating green habitats Providing more urban open space Mitigating heat island effect Coping with climate change Making reference to the concept of “Sponge City” –

following the nature with flexibility

lIIustration of the concept of "Sponge City"

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Upstream Section Midstream Section

Project Scope

● Reconstructing and rehabilitating a section of Kai Tak River of about 600 m long from Po Kong Village Road to Tung Kwong Road

● Constructing a box culvert of about 400 m long alongside the Kai Tak River from Wong Tai Sin Police Station to Tung Tai Lane

● Conducting landscaping works

● Reconstructing and rehabilitating a section of Kai Tak River of about 500 m long from Tung Kwong Road to Prince Edward Road East

● Conducting landscaping works

Commencement Date 2011 2013

CompletionDate 2018 2017

Project Cost About $1.6 B About $1.2 B

Kai Tak River Improvement Works

Note: The construction and upgrading of the downstream section of Kai Tak River, being undertaken by CEDD, commenced in 2013 and were substantially completed in 2018 at a project cost of about $2.5 B

Revitalised Kai Tak River28

● Revitalising the existing 1 km long Tsui Ping Nullah alongside King Yip Street, King Yip Lane and Tsui Ping Road

● Beautifying the adjoining walkways, enhancing connectivity and walkability by means of provision of walkways and landscaped decks beside the river to match with the project theme

Project Progress: Subject to funding approval, the works will commence in end-2019 and target for completion in end-2023.


Revitalisation of Tsui Ping River

Project Scope:

Illustration of water gate at the revitalised Tsui Ping River

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4.3 Operations and Maintenance

Emergency Control Centre

Apart from conducting regular inspections and repairs of stormwater drains and sewers, DSD promptly cleans up pipes as necessary to keep the channels clear. During the period of 2018-19, DSD cleared 780 km of stormwater drains and 726 km of sewers over the territory. Our Drainage Hotline received about 36,400 cases and handled 36,130 cases within 24 hours after receipt of the case. Over 99% of the public were satisfied with our services.

Whenever a flooding report is received, whether it involves public or private channels, DSD usually attends the scene as soon as possible for clearing the blockage and take appropriate flood relieving measures in order to reduce the impact of flooding on the public. During severe weather, DSD would activate an Emergency Control Centre to co-ordinate and respond to unexpected incidents.

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4.4 Rehabilitation and Replacement of Stormwater Drains and Sewers

Aged pipe – exposure of reinforcement

Rehabilitated pipe

Project Progress: The works commenced in January 2018 and targeted for completion in 2022.

Project Scope:● Rehabilitating the existing trunk sewers (about 1.7 km long)

in Ngau Chi Wan, To Kwa Wan, Sha Tin and Sai Kung to reduce the risk of sewage leakage and to enhance the reliability of the sewerage system

● Constructing a new submarine trunk sewer across Sai Kung Hoi linking Sai Kung Town and Tui Min Hoi and constructing duplicate trunk sewers along Yuen Wo Road near Sha Tin Sewage Pumping Station

Project Cost: About $680 M

Rehabilitation of Trunk Sewers in Kowloon, Sha Tin and Sai Kung

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Rehabilitation of Underground Stormwater Drains and Sewers

● Conducting condition survey for about 168 km underground stormwater drains and 75 km underground sewers over the territory

● Rehabilitating about 41 km underground stormwater drains and 19 km underground sewers over the territory

Project Progress: Stage 1 works commenced in January 2019 and targeted for completion in 2022. Stage 2 and Stage 3 works will be implemented in stages starting from 2020.

Project Scope:

Project Cost: About $515 M (for Stage 1 works)

Totally Integrated Sonar and Closed-circuit TV Inspection System

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DSD strives to utilise renewable energy for combating climate change.

Total Generated Renewable Energy

Renewable Energy SystemsGenerating Capacity (kW) (1)

2016-17 2017-18 2018-19Biogas Combined Heat and Power Generators , Micro-turbines, Boilers and Duel Fuel Engines(2)

12,093 12,093 10,967

Solar Systems 1,323 1,392 1,435

Hydro-turbine — — 23

Total 13,416 13,485 12,425

2016-17 2017-18 2018-19

Total Generated Renewable Energy 21.7 28.2 28.5

Notes: 1. The generating capacities of the boilers refer to their thermal

generating capacities, while the generating capacities of other systems refer to their electricity generating capacities

2. One of the four dual fuel engines was demolished and would be replaced by a combined heat and power generator

5. Utilisation of Renewable Energy

(in million kWh)

33


Solar Farm at Siu Ho Wan Sewage Treatment Works

Generation of Renewable Energy from Biogas

Commissioning Date: 2016

Project Details: The solar farm, comprising over 4,200 photovoltaic panels, has an installed generation capacity of 1,100 kilowatts

Background: The biogas produced in the course of sewage sludge treatment in sewage treatment works is a renewable energy source. It is converted to electricity and heat for in-house use by generators and boilers in the sewage treatment works.

Environmental Benefit: The renewable energy generated from biogas in 2018-19 amounted to 27.3 million kWh and the reduction of carbon dioxide emission exceeded 19,000 tonnes.

Environmental Benefits:● Electricity generated by the solar farm, which is supplied to

facilities inside the treatment works via the internal power distribution network, can be as much as 1.1 million kWh annually

● Annual reduction of carbon dioxide emission can reach about 770 tonnes

Project Cost: About $27 M

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1,832 km63 km

2,427 km363 km

21 km

4,706 kmTotal

6. Key Statistics and Data

● Sewers● Sewage tunnels

● Stormwater drains● Engineered channels● Drainage tunnels

Stormwater Drainage System

Sewerage System

Highest Hourly Rainfall 145.5 mm 7 June 2008

Highest Daily Total Rainfall 534.1 mm 19 July 1926

Highest Annual Total Rainfall 3343.0 mm 1997

Mean Annual Total Rainfall 2398.5 mm 1981-2010

Rainfall Record in Hong Kong

According to the Climatological Information Services in the website of Hong Kong Observatory:

Drainage System under DSD

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1824

441

Sewage Pumping StationsStormwater Pumping Stations

Total

25036

355

Facilities

Preliminary Treatment Works Primary Treatment Works Chemically Enhanced Primary Treatment (CEPT) Works Secondary Treatment WorksTertiary Treatment Works

Sewage Treatment Works 69

Kowloon City No. 1 Sewage Pumping Station

36

2016-17 2017-18 2018-19

By Preliminary Treatment 45 58 75

By Primary Treatment 5 5 6By Chemically Enhanced Primary Treatment 779 757 751

By Secondary Treatment 186 187 196

Total 1,015 1,007 1,028

Volume of Sewage Treated(in million m3)

Notes:

1. Sewerage network in Hong Kong is currently serving over 93% of the population (based on the number of domestic water bill accounts with sewage charges levied)

2. The volume of sewage treated by tertiary treatment in 2018-19 is about 0.16 million m3

3. Daily quantity of sewage sludge generated in 2018-19 is about 1,075 tonnes

Major Sewage / Stormwater Pumping Stations Design Pumping Capacity (m3/s)

Sewage Pumping StationsStonecutters Island Main Pumping Station 63.3Cheung Sha Wan Sewage Pumping Station 14.7

Stormwater Pumping StationsSan Tin Stormwater Pumping Station 8.0

Chuk Yuen Stormwater Pumping Station 8.0

Design Pumping Capacity of Major Pumping Stations

37


Major Sewage Treatment Works Design Treatment Capacity (m 3 /day)

Preliminary Treatment WorksNorth West Kowloon Preliminary Treatment Works* 450,800

Kwun Tong Preliminary Treatment Works* 333,000San Wai Preliminary Treatment Works 164,000

Primary Treatment WorksCheung Chau Sewage Treatment Works 4,000Tai O Imhoff Tank 1,200

Chemically Enhanced Primary Treatment WorksStonecutters Island SewageTreatment Works 2,450,000

Pillar Point Sewage Treatment Works 241,000Siu Ho Wan Sewage Treatment Works 180,000Sham Tseng Sewage Treatment Works 16,800

Secondary Treatment WorksSha Tin Sewage Treatment Works 340,000Tai Po Sewage Treatment Works 120,000Shek Wu Hui Sewage Treatment Works 93,000Yuen Long Sewage Treatment Works 70,000Stanley Sewage Treatment Works 11,600Sai Kung Treatment Works 8,000

Tertiary Treatment WorksNgong Ping Sewage Treatment Works 1,100

Design Treatment Capacity of Major Sewage Treatment Works

* The sewage treated by this preliminary treatment works is further conveyed to Stonecutters Island Sewage Treatment Works for chemically enhanced primary treatment

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7. Public Education

Schools or relevant organisations are welcome to visit our sewage treatment and flood prevention facilities through prior application. Please visit the following website for more information:http://www.dsd.gov.hk/EN/Education/Visit_to_DSD_Facilities/index.html

We will visit schools and introduce our work through presentations, videos and Question-and-Answer session. For details, please visit the following website:https://www.dsd.gov.hk/EN/Education/DSD_Outreach_Educational_Programme/index.html

Lai Chi Kok Drainage Tunnel Equipment Enclosure

Visit to DSD Facilities

DSD Outreach Educational Programme

39

http://www.dsd.gov.hk/EN/Education/Visit_to_DSD_Facilities/index.html

http://www.dsd.gov.hk/EN/Education/Visit_to_DSD_Facilities/index.html

https://www.dsd.gov.hk/EN/Education/DSD_Outreach_Educational_Programme/index.html

https://www.dsd.gov.hk/EN/Education/DSD_Outreach_Educational_Programme/index.html


8. Contact Us

Drainage Hotline2300 1110

Sewage Services Charges Enquiries2834 9432

General Enquiries2877 0660

Websitehttp://www.dsd.gov.hk

[email protected]

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2.1 organisation chart 2.2 staff establishment · sewage treatment works from 70,000 m 3 to 150,000...

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