Pesticide Ecological Risk Assessment

Intrinsik’s pesticides division has decades of experience conducting a wide variety of ecological risk assessments (ERAs).  

We regularly conduct ERAs for pesticide registrations and re-registrations in the United States, Canada, and South America. These ERAs range from standard screening-level risk assessments conducted using the U.S. Environmental Protection Agency (EPA)/Canadian Pest Management Regulatory Agency (PMRA) toolbox of screening-level models, to complex, highly refined probabilistic risk assessments. We develop species-specific, pesticide-specific, and location-specific models to best estimate the potential for exposure and subsequent risk estimates. We often work closely with our valued partner Stone Environmental Inc., to bring you a comprehensive evaluation solution. We also provide services for pesticide dossier preparation and submission.


  • FIFRA and PCPA-based ecological risk assessments
  • Development of refined wildlife exposure models specific to seed-treatment, granular and liquid pesticides
  • Refined species-specific exposure and effects assessments
  • Refined aquatic exposure modelling and effects determinations
  • Spatial analyses using Geographic Information System (GIS) tools
  • Probabilistic modelling
  • Determination of aquatic benchmarks for pesticides registered in the United States and Canada based on analyses of laboratory and higher tier (e.g., mesocosm) study data
  • Weight-of-evidence assessments
  • Data quality evaluations
  • Study director and method development services for field studies following Good Laboratory Practice
  • Response and rebuttal documents
  • Expert witness legal support

How Can We Help?

Our scientists have the expertise to address your complex
toxicological health and environmental issues, including product
development and business risks to avoid scientific and regulatory delays.

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