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

E. Coli

Date: August to October 2022

Division: Microbiology

Project: Provision of Sampling and Laboratory Analysis Services for Victoria Harbour Water Quality Survey

Client: Environmental Protection Department

E. Coli & Vibrio Cholerae

Date: June 2020 to present

Division: Microbiology

Project: Tender for Provision of Bacteria Analysis in Seawater to Fish Marketing Organization

Client: Fish Marketing Organization

Legionella Bacteria Count

Date: January 2022 to present

Division: Microbiology

Project: Contract of Water Analysis Services

Client: Citybase Property Management Ltd.

Antimicrobial Effectiveness Test

Date: May 2022 to present

Division: Microbiology

Project: Antimicrobial Effectiveness Test

Client: Nano & Advanced Materials Institute Ltd.