The integrated environment and health consultancy



IEH Consulting provides an impressive range and depth of scientific expertise and services, falling into the five categories shown in the boxes above. Please click on these for further details.

Additional activities and services that we offer include facilitation, coordination, chairing meetings and project management. IEH Consulting also provides expert training courses (see below).

Through our Directors and Associates we are able to draw on an impressive range and depth of scientific expertise - including individuals who are leaders in their field, as demonstrated for example by the impressive list of authoritative national and international expert committees and advisory bodies on which they currently sit. IEH Consulting Ltd is now on the Office for Product Safety & Standards (OPSS) Register of Specialists as an approved supplier.

A recent example of our work and expertise on a topic of international importance, The growing prevalence of antimicrobial resistance - AMR - is one of the most pressing global health concerns of modern times. It is an issue that spans human, animal and environmental health and must be tackled through multi-sectoral actions. IEH Consulting is engaged in various activities to reduce the environmental impact of pharmaceuticals including antibiotics: this presentation focuses on the issue of veterinary medicines and how they may impact on the environment. The presentation shows how farmers and veterinarians can deliver an improved understanding of the “One Health” concept by understanding the environmental pathways for antibiotics and the occurrence and persistence of AMR in the environment. The basic principles of risk mitigation and preventative measures to reduce the occurrence and spread of AMR in everyday farming practice are explained. antimicrobial resistance, is available as a presentation "The Role of Veterinary Medicines in the Spread of AMR in the Environment". IEH Consulting provides advice on AMR internationally, with director Prof. Jason Weeks presenting at the OIE workshop on antimicrobial resistance (AMR) in aquaculture that took place in Durban, South Africa in 2019.

Our experts have also compiled a useful Glossary of Toxicological Risk Assessment Terms. A pre-print of a recent paper on the health effects of microplastics co-authored by Ruth Bevan, Paul Harrison, Jason Weeks and others is available here: Exposure of humans to microplastics in the environment and potential risks to health: an overview


IEH Consulting Directors and Associates have run a number of training courses/seminars over the years, including:

  • Epidemiology for Decision Makers
  • Toxicology - What you need to know
  • EFSA Risk Assessment Training Course

We are pleased to offer the following IEH Consulting training courses.

All courses can be tailored to meet client needs with respect to duration, content, venue, budget etc.

Please contact us for further details and costs.

IEH Publications

The Directors and Associates of IEH Consulting have a highly impressive record of past publications and since IEH Consulting was established have begun to publish peer-reviewed papers and high-profile reports under this affiliation. These papers are listed below:

Bevan R, Harrison P, Weeks J, Marsden P, Coulon F, Finkbeiner P, Hassard F, Jarvis P, Jefferson B & Campo P (2021) Exposure of humans to microplastics in the environment and potential risks to health: an overview.

IEH Consulting (2020) Personal Care Products and Domestic Cleaning Products – Toxicological Assessment of Prioritised List of Chemicals. Available at:

World Health Organisation (2020) Chromium in drinking-water. Background document for development of WHO Guidelines for drinking-water quality. Geneva: World Health Organization; 2020 (WHO/HEP/ECH/WSH/2020.3). Available at:

World Health Organisation (2020) Iodine in drinking-water. Background document for development of WHO Guidelines for drinking-water quality. Geneva: World Health Organization; 2020 (WHO/HEP/ECH/WSH/2020.5). Available at:

Gouin T, Cunliffe D, De France J, Fawell J, Jarvis P, Koelmans AA, Marsden P, Testai EE, Asami M, Bevan R, Carrier R, Cotruvo J, Eckhardt A, & Ong CN (2020) Clarifying the absence of evidence regarding human health risks to microplastic particles in drinking-water: High quality robust data wanted.

Taylor JA, McLoughlin R, Sandford J, Bevan R, & Aldred D (2020) Legionella species: A potential problem associated with rain water harvesting systems? Indoor and Built Environment.

Bevan J, Harrison PTC, Jeffery B & Mitchell D (2020) Evaluating the risk to humans from mineral oils in foods: Current state of the evidence. Food and Chemical Toxicology,136, 110966.

Harrison PTC, Bevan RJ, Holmes P (2018) General concepts of human health risk assessment. In:Toxicology and Risk Assessment: A Comprehensive Introduction Eds. Greim H and Snyder R. Wiley.

Bevan R, Kreiling R, Levy L & Warheit D (2018) Toxicity testing of poorly soluble particles, lung overload and lung cancer. Regulatory Toxicology and Pharmacology, 100, 80-91. Available here.

Committee on Toxicity (2018) Report of the Synthesising Epidemiological Evidence Subgroup (SEES) of the Committee on Toxicity and Committee on Carcinogenicity. Available here.

La Vedrine M, Hanlon J, Bevan R, Floyd P, Brown T & Matthies F (2018) Extensive literature search, selection for relevance and data extraction of studies related to the toxicity of PCDD/Fs and DL-PCBs in humans. European Food Standards Agency. Available here.

World Health Organisation (2018) Alternative drinking-water disinfectants: Bromine, iodine and silver.
Part I - Bromine as a drinking-water disinfectant available at:
Part II - Iodine as a drinking-water disinfectant available at:
Part III - Silver as a drinking-water disinfectant available at:

Bevan J & Harrison PTC (2017) Threshold and non-threshold carcinogens: a survey of the present regulatory landscape. Regulatory Toxicology and Pharmacology, 88, 291-302

European Food Standards Agency (2017) Human Biomonitoring Data Collection from Occupational Exposure to Pesticides. Available at

World Health Organisation (2017) Chemical Mixtures in Source-water and Drinking-water. Available at

Crump D, Harrison P, De Brouwere K, Scutaru A, Daeumling C, and Wolkoff P. (2016). Health-based evaluation of chemical emissions from construction products to indoor air: Development and application of the EU-LCI harmonisation framework. Proceedings of Indoor Air 2016, 3-8 July 2016, Ghent, Belgium, paper 96.

Drummond G, Bevan R & Harrison P (2016) A comparison of the results from intra-pleural and intra-peritoneal studies with those from inhalation and intratracheal tests for the assessment of pulmonary responses to inhalable dusts and fibres. Regulatory Toxicology and Pharmacology, 81, 89-105.

Kephalopoulos S, et al. (2016). Promoting healthy and energy efficient buildings in the European Union – National implementation of related requirements of the Energy Performance Buildings Directive (2010/31/EU), EUR, Luxembourg, European Union, 2016. Available at

Wolkoff P, Crump DR & Harrison PTC (2016) Pollutant exposures and health symptoms in aircrew and office workers: Is there a link? Environment International, 87(2), 74-84.

Harrison P, Holmes P, Bevan R, Kamps K, Levy L & Greim H (2015) Regulatory risk assessment approaches for synthetic mineral fibres. Regulatory Toxicology and Pharmacology, 73, 425-441.