Drainage Services Department

What Drainage Services Department does

Drainage Services Department (DSD) is a statutory department of the Hong Kong Special Administrative Region Government under the Development Bureau, established in 1989 to deliver stormwater drainage and sewage treatment services across the territory. Its operational mandate covers flood prevention infrastructure, sewage collection and treatment, and environmental management, supported by an installed base of 4,518 km of sewerage and stormwater drainage networks, drainage tunnels (Lai Chi Kok, Hong Kong Island West, Tsuen Wan), underground stormwater storage schemes (Tai Hang Tung at 100,000 m3 and Happy Valley at 60,000 m3), and major sewage treatment works including Stonecutters Island (1.7 million m3/day design capacity) and Shatin (340,000 m3/day). The Harbour Area Treatment Scheme (HATS), with 23.6 km of deep tunnels, is the centrepiece of the department's wastewater strategy.

The department employs advanced treatment and engineering technologies including Chemically Enhanced Primary Treatment (CEPT) at Stonecutters Island, trenchless pipe rehabilitation, BIM-based asset management, and Hong Kong's largest solar farm at Siu Ho Wan (1.1 million kWh annually, 770 tonnes CO2 reduction). Digital services include the Smart Drainage Map (智慧渠務一張圖) cross-departmental information platform launched April 2026, virtual facility tours, and public education programs. R&D collaboration is institutionalized through annual forums (since 2006) and recent international partnerships with Singapore PUB, UAE Consulate, and C40 Cities.

As a government department, DSD is funded through annual Hong Kong SAR budget allocations rather than commercial pricing, with no direct fees charged for core drainage and sewage services. Its customer base is effectively the entire Hong Kong population for flood protection and sewage services, with engagement extended to district councils, engineering consultants and contractors, academic institutions, and environmental organizations. Go-to-market operates through government procurement processes, stakeholder engagement, and public education initiatives rather than commercial sales channels.

Name

Drainage Services Department

Legal name

Drainage Services Department

Website

https://dsd.gov.hk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

The Drainage Services Department is a Hong Kong SAR government department established in 1989 that operates stormwater drainage networks, drainage tunnels, underground storage, and major sewage treatment works (including HATS and Stonecutters Island) to provide flood prevention and wastewater services to Hong Kong residents.

Ownership category

akta.pro rank

Product category

Public Drainage and Sewage Services

NAICS

Water, Sewage and Other Systems (2213), Sewage Treatment Facilities (22132), Administration of Air and Water Resource and Solid Waste Management Programs (924110)

SIC

Electric, Gas & Sanitary Services (4900), Sanitary Services (4950), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Public Works & Municipal Infrastructure (Streets, Stormwater, Facilities) (BPAIACAF)

akta.pro secondary industries

Public Works Departments (Streets, Bridges, Stormwater, Fleet, Maintenance) (BPAIALAD), Combined Sewer Overflow (CSO) Treatment & Wet-Weather Capacity (EUANADAF), Combined Sewer Overflow (CSO) Control & Compliance (Storage, Separation, Treatment) (EUANAEAG), Detention, Retention & Storage Systems (Ponds, Tanks, Vaults) (EUANAEAD)

Keywords

• Wastewater management
• Stormwater drainage
• Sewage treatment
• Flood prevention
• Drainage infrastructure

Headquarters

HQ city

Wan Chai

HQ country

Hong Kong SAR China

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Infrastructure, Operations, Technology or R&D, Supply Chain

Revenue model

1. Government Funding: DSD operates as a Hong Kong government department funded through annual government budget allocations for public infrastructure, flood prevention, and sewage treatment services. Revenue comes from general taxation and is allocated through the Development Bureau.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Drainage Services Department (DSD) is a Hong Kong SAR Government department that provides essential wastewater and stormwater drainage services. It operates an integrated portfolio of flood prevention infrastructure (drainage tunnels, underground stormwater storage schemes, floodway channels), sewage collection and treatment facilities (including the Harbour Area Treatment Scheme, Stonecutters Island STW, and Shatin STW), and environmental management assets such as the Siu Ho Wan solar farm and river revitalization projects. Services are delivered to Hong Kong residents, businesses, and partner government departments under statutory public-sector responsibility.

Product overview

Drainage Services Department (DSD) is a Hong Kong government department providing essential public infrastructure and services for flood prevention and sewage treatment. The department operates a comprehensive portfolio of infrastructure projects including drainage tunnels (Lai Chi Kok, Hong Kong Island West, Tsuen Wan), underground stormwater storage schemes (Tai Hang Tung, Happy Valley), major sewage treatment facilities (Stonecutters Island, Shatin, Sha Tau Kok), the Harbour Area Treatment Scheme (HATS) with its 23.6 km deep tunnels, and cavern relocation projects. DSD also provides digital services including the Smart Drainage Map for cross-departmental information sharing and virtual facility tours. The department generates renewable energy through Hong Kong's largest solar farm at Siu Ho Wan sewage treatment works, and maintains active R&D collaboration through annual forums. The portfolio is organized around four core service areas: flood prevention, sewerage, environmental management, and technology employed.

Differentiator

Problem solved

Functional benefit

Products and services

• Flood Prevention Infrastructure and Services Comprehensive flood prevention services covering drainage improvement works, flood warning systems, emergency response systems, and maintenance of stormwater drainage infrastructure for Hong Kong residents and businesses.
• Sewage Collection, Treatment and Disposal Sewerage services covering sewage collection, treatment, and disposal across Hong Kong, including the Harbour Area Treatment Scheme (HATS) and various sewage treatment facilities serving the general public.
• Environmental Management Services Environmental management services including reclaimed water production, ecological enhancement, renewable energy generation at treatment facilities, and greening initiatives for public benefit.
• Harbour Area Treatment Scheme (HATS) Comprehensive sewage treatment scheme for Victoria Harbour including 23.6 km of deep sewage tunnels and Stonecutters Island treatment facilities using Chemically Enhanced Primary Treatment, serving urban Kowloon, Kwai Tsing, Tseung Kwan O and north-eastern Hong Kong Island.
• Drainage Tunnels Major tunnel-based drainage interception systems for flood prevention including Lai Chi Kok Drainage Tunnel, Hong Kong Island West Drainage Tunnel, and Tsuen Wan Drainage Tunnel.
• Underground Stormwater Storage Schemes Large-scale underground detention facilities for flood control including Tai Hang Tung (100,000 m3) and Happy Valley Underground Stormwater Storage Scheme (60,000 m3).
• Sewage Treatment Facilities Various sewage treatment works including Stonecutters Island STW (largest CEPT facility), Shatin STW (largest secondary treatment), Sha Tau Kok STW expansion, and smaller village sewage treatment facilities serving Hong Kong residents.
• Relocation of Sha Tin Sewage Treatment Works to Caverns Major infrastructure project relocating the Sha Tin sewage treatment facility underground into caverns to free up surface land for community use.
• Solar Farm at Siu Ho Wan Sewage Treatment Works Hong Kong's largest solar farm with over 4,200 polycrystalline silicon panels generating 1.1 million kWh annually and reducing 770 tonnes of CO2 emissions per year, installed on top of Siu Ho Wan STW.
• Smart Drainage Map (智慧渠務一張圖) Cross-departmental integrated system providing one-stop visualization of drainage infrastructure information, enabling stakeholders and partner departments to access integrated data through a single interface.
• Yuen Long Bypass Floodway 3.8 km main drainage channel with 7 hectares of engineered wetland, designed to intercept 40% of runoff in the Yuen Long catchment for flood mitigation.

Quantifiable outcome

• 100,000 m3 stormwater storage capacity at Tai Hang Tung - designed to withstand 50-year return period rainfall events exceeding 100mm/hour
• +3 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered minor and core.

• Consulate General of the United Arab Emirates in Hong KongminorStrategic or Co-development Partner · 3 June 2026DSD engaged with UAE Consulate General to exchange views on climate resilience, flood management, and renewable energy. Discussion focused on sharing experiences in water management and sustainable infrastructure development.
• Singapore Public Utilities Board (PUB)coreStrategic or Co-development Partner · 9 April 2026DSD and Singapore PUB strengthened cooperation on flood resilience, cavern development, and innovation technology. The partnership involves technical exchange and collaboration on resilience flood management strategies and underground space utilization for sewage treatment facilities.
• C40 Cities Climate Leadership Group - Delta Cities ConnectioncoreStrategic or Co-development PartnerDSD is a member of the C40 Delta Cities Connection representing Hong Kong in technical exchanges on flood prevention with other delta cities globally.
• Guangdong-Hong Kong Climate Change Coordination Working GroupcoreStrategic or Co-development PartnerDSD participates in the cross-border coordination group exchanging drainage system planning experiences with Guangdong Province representatives.
• World Meteorological Organization (WMO)minorStrategic or Co-development PartnerWMO World Weather Research Programme delegation visited DSD's drainage facilities to exchange knowledge on weather research and flood management integration.
• Occupational Safety and Health CouncilminorImplementation/ SI/ Consulting PartnerDSD and the Occupational Safety and Health Council jointly organized safety training for emergency works in adverse weather conditions, demonstrating collaboration on workforce safety.

Scale indicators13 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Thames Water: The UK's largest water and sewerage company serving London and the Thames Valley. Operates the Thames Tideway Tunnel, an analogous mega-tunnel interception system to DSD's HATS, but functions as a regulated private/listed utility rather than a government department.

Direct peers

• Sydney Water: New South Wales state-owned water utility providing drinking water, wastewater, and stormwater services across greater Sydney. Comparable in mandate, customer base scale, regulatory oversight, and the integration of treatment plants with recycling and environmental programs.
• DC Water: Independent authority providing wastewater and drinking water services in the District of Columbia, including large-scale tunneling (Clean Rivers Project) that mirrors DSD's drainage tunnel and underground storage approach. Operates under a similar regulated-utility/government authority structure with significant capital programs.
• Melbourne Water: Statutory authority managing Melbourne's water supply, sewerage, and stormwater drainage under a wholly government-owned model similar to DSD. Operates comparable large-scale drainage tunnels, waterways, and treatment facilities with a parallel focus on integrated water cycle management and climate adaptation.
• LA Sanitation & Environment (LASAN): City of Los Angeles bureau managing wastewater collection and treatment, stormwater drainage, and solid resources. Comparable public-agency mandate, large treatment plant footprint (Hyperion), and combined sewer overflow infrastructure paralleling DSD's HATS and stormwater storage assets.
• Singapore Public Utilities Board (PUB): Singapore's national water agency managing water supply, used water (sewage) and stormwater drainage under a government mandate. PUB is DSD's most direct counterpart and existing strategic partner, operating comparable mega-infrastructure (Deep Tunnel Sewerage System), active R&D forums, and a similar climate-resilience focus.
• NYC Department of Environmental Protection: NYC's municipal agency overseeing water supply, wastewater treatment, and stormwater management with a citywide network of sewers and treatment plants. Operates on a comparable public-mandate, tax-funded model with large-scale climate adaptation (DEP's cloudburst resiliency) and harbor water-quality programs analogous to HATS.
• Water Supplies Department, Hong Kong SAR: The sister HKSAR government department responsible for water supply and distribution across Hong Kong. WSD complements DSD's drainage mandate and shares the same Development Bureau oversight, comparable scale, ISO certifications, and government-funding model.

Others

• Hong Kong Environmental Protection Department (EPD): Sister HKSAR government department responsible for environmental regulation and waste management. EPD partners with DSD on projects such as the Sludge Treatment Facility T·PARK and shares the public-sector funding and governance model, but its mandate is regulatory and solid-waste, not drainage.

Regional players

• Shanghai Water Authority / Shanghai Sewerage Company: Government-affiliated water and drainage authority managing Shanghai's water supply and wastewater. Operates in a comparable dense, delta-city Asian context with similar typhoon/heavy-rainfall exposure, providing a relevant regional analogue rather than a direct head-to-head competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/drainage-services-department-hksar

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Drainage Services Department