Bithiah K. Y. Liu

Laboratory Manager

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One of the very best HOKLAS accredited environmental laboratories in Hong Kong, ETL’s Environmental division provides high quality services and independent testing in the analytical areas of air, dust, water, waste water, industrial sewage and noise.


With state-of-the-art machinery, our Environmental division specialises in water analysis for Heavy Metal and Non-Metallic Constituents in both drinking water and wastewater.


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

Site Work
  • Environmental Monitoring & Audit (EM&A)
  • Baseline and Impact Monitoring of Air, Noise & Water Quality
Laboratory Testing
  • Quality Water Supply Scheme for Buildings - Fresh Water (plus)  - 7 testing parameter + 4 metals

  • Newly Installed Fresh Water Inside Service - 8 testing parameter + 4 metals

  • Heavy Metal Analysis in Drinking Water

  • Test for Wastewater - Organic Pollutants, e.g. COD, BOD, Oil & Grease

  • Test for Wastewater - Non-Metallic Constituents e.g. pH, colour, SS

Job Reference

Testing of Drinking Water

Date: July to December 2015

Division: Environmental

Project: Dragons Range, Kau To Shan

Client: Hsin Chong Aster Building Services Ltd

Wastewater Quality Monitoring

Date: October 2015 to January 2016

Division: Environmental

Project: Stonecutters Sewage Treatment Works

Client: Chun Wo - CEC Joint Venture

Water Quality Monitoring

Date: January 2014 to present

Division: Environmental

Project: Replacement and Rehabilitation of Water Mains, Stage 4 Phase 2- Submarine Mains and Associated Works among Peng Chau, Sunshine Island and Hei Ling Chau

Client: Wo Hing Construction Co Ltd

Environmental Monitoring & Audit

Date: December 2014 - April 2017

Division: Environmental

Project: Hong Kong – Zhuhai-Macao Bridge Hong Kong Hong Kong Boundary Crossing Facilities

Client: China Harbour Engineering Co. Ltd.