Environment Agency: Guidance Medium combustion plant: apply for an environmental permit
Medium Combustion Plant Directive (MCPD) permits are standalone permits for stationary or mobile medium combustion plant which cover emissions of…
Rigorous, independent air quality expertise
Isopleth Ltd is an independent environmental consultancy specialising in the assessment of air quality, dust and odour. We are able to provide professional advice and support services to industry, local government, regulators and individuals on matters relating to air quality and environmental impact assessments.
Our Services
Specialist expertise across environmental disciplines
Tailored assessment and consultancy for planning, permitting, compliance and dispute resolutions
Air Quality
Assessment of air quality impacts associated with a wide range of sectors, including completing assessments and acting as an air quality expert witness
Learn moreOdour Assessment
Isopleth Ltd draws on over 28 years experience relating to the assessment of odour impacts.
Learn moreDust Management
Residential, industrial and retail sectors, with over 28 years experience relating to the assessment of dust impacts.
Learn moreLatest Isopleth News
News
Natural England: Guidance Air pollution and development: advice for local authorities
Natural England issued new ‘standing advice’ on the impacts of air pollution on protected sites in October 2025 (subsequently update…
New air quality planning guidance for developments in Wiltshire
New Supplementary Planning Guidance (SPG) to deliver air quality improvements through the planning system was approved at Wiltshire Council's Full…
28+
Years of specialist experience
UK and International
Project Experience
10+
Sectors covered including solid waste, waste water, housing, commercial and agriculture
FIAQM
Fellow of the Institute of Air Quality Management
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Whether you need screening assessment, full EIA chapter, or expert witness support – we're here to help. Contact us for an intial, no-olbigation discussion.