Louis Tremblay

Louis Tremblay

Environmental Toxicologist – Microcontaminants and Toxicity

Role at Cawthron

Louis is an environmental toxicologist in the Coastal and Freshwater Group. He is involved in the development of methodologies to characterise the effects of anthropogenic stressors on the receiving environment. His research involves assessment of the toxicity of contaminants and complex mixtures, like sewage effluent.

Louis’ main area of interest is the characterisation of the mechanisms of toxicity of microcontaminants on key New Zealand species.

Technical skills, experience and interests

  • Development of biomarkers in New Zealand native species
  • Methodologies based on different levels of biological organisation, from molecular to whole animal, to characterise the effects of contaminants
  • Research approach based on the integration of the quadruple bottom line to generate acceptable environmental management options
  • Risk assessment of endocrine disrupting chemicals (EDCs) and remerging contaminants, such as pharmaceuticals and personal care products (PPCPs)
  • Risk of multiple stressors and complex mixtures

Professional affiliations

  • Society of Environmental Toxicology and Chemistry (SETAC)
  • New Zealand Freshwater Sciences Society 
  • Royal Society of New Zealand


  • PhD. University of Guelph
  • MSc. McGill University
  • BSc. University of Montreal


Louis Tremblay