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Environment Agency gov.uk

Request an ammonia screening assessment

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When you need an ammonia screening assessment

You must request an ammonia screening assessment from the Environment Agency before:

  • applying to change (vary) an existing permit that may affect ammonia emissions
  • the relevant ammonia screening assessment data spreadsheet forms
  • an online ammonia screening assessment request form

    • You do not need to complete an ammonia screening assessment if you are:

  • varying your intensive farming permit in a way that will not affect ammonia emissions from the site
  • transferring or surrendering your permit

    • Before requesting your ammonia screening assessment, check you can comply with the requirements of the Best Available Techniques (BAT) Reference Document (BREF) for the Intensive Rearing of Poultry or Pigs (IRPP). This document sets out the standards that permitted farms must meet and the BAT associated emissions levels (AELs).

  • confirm in your proposals that all livestock housing meets BAT
  • demonstrate the new housing (new plant) will meet the BAT-AELs for ammonia emissions and nitrogen and phosphorus excretion, where applicable
  • review the ‘BAT-AELs’ sheet in the data spreadsheet forms for a comparison of current ammonia emission factors against the BAT-AELs
  • submit information with your application to confirm the proposed housing systems will meet the relevant ammonia BAT-AELs

    • Ammonia screening assessment data spreadsheet forms

    How to complete the data spreadsheet forms

    You must download and complete the relevant data spreadsheet forms with:

  • a breakdown of livestock numbers by type and by housing (for example, number of sows, growers and finishers on fully slatted floorings and partly slatted flooring)
  • ventilation system type (fan or natural)
  • ventilation location (roof or side mounted)
  • height of roof vents (in metres) (if fans are roof mounted)
  • building height (in metres) (if fans are side mounted or buildings are naturally ventilated)
  • number of fans, fan diameter (in metres) and fan flowrate (in metres per second) (if fans are roof mounted)

    • This is an extract. The publication continues at the source.

    Contains public sector information licensed under the Open Government Licence v3.0. Licence

    Read the original at the source: https://www.gov.uk/guidance/request-an-ammonia-screening-assessment

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    Provenance

    Organization
    Environment Agency — imported from official source
    Official source
    https://www.gov.uk/government/organisations/environment-agency.atom ATOM
    Imported
    October 22, 2026 14:00
    Versions
    1 recorded
    Identity
    https://www.gov.uk/guidance/request-an-ammonia-screening-assessment#2026-10-22T13:50:02Z

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