Call us now : 852-23615129
WhatsApp : 852-97311222
About us
Four Decades of Excellence in Environmental Services
Since 1982
Yue Yi Environmental Engineering Co., Limited (formerly Yue Yi Cleaning Services Limited) was founded in 1982. From a small cleaning service company, we have grown into a large-scale professional environmental protection and building equipment cleaning one-stop service provider.
In 2006
We established a branch office in Macau, extending our high-quality integrated services to government and commercial organisations, shopping malls, hotels, and the catering industry across Hong Kong and Macau.
In 2025
Driven by our continuous business expansion and unwavering commitment to excellence, we officially established Yue Yi Drainage Engineering Co., Limited. Focusing exclusively on drainage and sewage treatment allows us to deliver more efficient management and specialised technical expertise to our clients.
Today
With over 40 years of operation, we employ approximately 100 full-time staff and professional technical management personnel, supported by advanced technologies and professional management systems. Our commitment to the highest quality of service has earned us an excellent reputation and the lasting trust of our clients.
Our Services
We are committed to providing professional and efficient one-stop environmental and facility maintenance services, covering six major areas: wastewater treatment, drainage engineering, electromechanical maintenance, fume extraction system cleaning, ventilation duct maintenance, and various environmental cleaning services. With advanced technology and extensive experience, we ensure that every aspect complies with regulatory standards, creating a safe, clean, and healthy operating environment for you, improving facility efficiency and quality of life.
Sewage Treatment Services
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Clean grease traps, sewage pump wells, sand traps, and fecal pits
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Apply biological treatment to sewage water for effective grease and odor removal
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Ensure compliance with environmental discharge standards, maintaining clear pipelines and sanitation
Drainage Engineering Services
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Perform high-pressure water jetting and mechanical drain unblocking
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Conduct CCTV drainage surveys, precise defect location, and rapid repair
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Provide emergency drain unblocking services to ensure stable operation of underground
Electrical & Mechanical Maintenance
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Maintain exhaust systems, electrostatic precipitators, sewage systems, and water supply systems
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Perform plumbing, drainage, metal welding works, and water pump installation and repair
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Ensure efficient electromechanical operation, reduce failure risks, and enhance system safety and durability
Kitchen Exhaust System Cleaning
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Cleaning of hydro vent hood systems, exhaust ducts, and fans
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Maintenance of electrostatic precipitators and degreasing equipment
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Improvement of kitchen air quality and compliance with fire safety and hygiene regulations
Ventilation Duct Cleaning
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Clean air conditioning and ventilation ducts with advanced equipment
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Carry out dust removal, disinfection, and mold prevention on all types of ventilation ducts
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Remove pollutants and allergens to ensure clean air circulation and a healthy indoor environment
Environmental Cleaning Services
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Clean fresh water tanks, salt water tanks, fire service tanks, and pools
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Conduct water quality testing to ensure drinking water safety and meet legal requirements
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Provide high-altitude cleaning services, including large crystal lighting fixtures, glass, and more...
ISO 9001:2015
ISO 14001:2015
ISO 45001:2018
Reliable &
Trustworthy
Professional &
Experienced