Guy P. K. Kong

Laboratory Manager

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A new testing service for ETL, our Microbiology division offers a wide range of microbiological analysis of environmental water samples as well as antimicrobial tests for consumable products, such as Heterotrophic plate count, Total coliforms, Faceal coliforms, E. coli, Legionella, and the presence of amoeba and pathogens.


Our experienced technical staff design testing protocols fit for each client's product specification, and offer diverse services such as swab test analysis, antimicrobial efficacy tests in textiles and plastics, and disinfection products and water filters, amongst others.


For further information or to receive a quote, please contact the Microbiology team

Water Testing
  • Legionella in cooling tower water and drinking water, including Legionella Pneumophila

  • Heterotrophic Plate Count (Total Bacterial Count) in Water Samples

  • Total Coliforms in Drinking Water & Marine Water

  • E. coli in Drinking Water & Marine Water

  • Faecal Coliform in Drinking Water & Marine Water

  • Presence of Amoeba

  • Staphylococcus aureus in Water Samples

  • Pseudomonas aeruginosa in Water Samples

  • Vibrio cholera in Water Samples

  • Enterococci in Water & Wastewater Samples

  • Clostridium perfringens in Water Samples

Consumable Products Testing
  • Antimicrobial Effectiveness Test on Water Filter System

  • Antibacterial & Antifungal Activity on Textile Materials

  • Antibacterial Activity on Plastics Surfaces

  • Antibacterial & Antifungal Removal Test on Disinfection Products & Sanitizers

  • Swab Test on Surfaces to Determine the Level of Hygiene

  • Hygienic Standard for Disposable Sanitory Products, including Face Mask

  • Microbiological Examination of Cosmetics

Airborne Microbe Sampling
  • Total Bacterial Count in Indoor Environment

  • Total Fungal Count in Indoor Environment

Job Reference

Total Coliform & E. Coli

Date: January 2022 to present

Division: Microbiology

Project: Provision of Water Sampling Test for Tai Po Campus, Pak Shek Kok Sports Centre & Tseung Kwan O Study Centre

Client: The Education University of Hong Kong

E. Coli & Staphylococcus Aureus

Date: June 2020 to present

Division: Microbiology

Project: Redevelopment of Kwai Chung Hospital Phase 2

Client: Shui On Joint Venture

Legionella Bacteria Count

Date: January 2022 to present

Division: Microbiology

Project: Contract of Water Analysis Services

Client: Cheung Kong Center Property Management Ltd.

Antimicrobial Effectiveness Test

Date: May 2022 to present

Division: Microbiology

Project: Antimicrobial Effectiveness Test on Antibacterial Products

Client: Nano & Advanced Materials Institute Ltd.