Southwest Environmental Limited
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Environmental Consultancy Services to Industry, Business and Individuals

Ammonia Emissions Assessment 

Do you require an Ammonia Emissions Assessment? Please contact SWEL for a quotation.

An  Ammonia Emissions Assessment is a report which looks in to the rates of ammonia exposure to sensitive receptors at certain distances from a proposed development, or an existing development. This can be an industrial installation, as waste processing facility but more often than not it is an intensive livestock development.

An Ammonia Emissions Assessment is often paired with an Odour Impacts Assessment, in both cases Emission rates are calculated for the proposed development. This can be done using secondary data, which is often the case in planning. Or for an Environmental Permit Application, this may include the collection of real world monitoring data from a pre-existing site. 

This ammonia emssions data is then fed in to emissions modeling software. We use AERMOD, which is a piece of software developed in the USA and is valid alternative to the like of ASDM modelling which is also popular amongst consultants.

The software takes in to account a wide varierty of variable such as the temperatures of air, temperatures of exhaust, turbidity of atmosphere. . . and most importantly wind direction. Typically a 1 year weather data set is used. This gives a idea of ammonia concentrations at nearby receptor locations, which might includes houses, or schools or both.

Ammonia Emissions Assessment will include benchmarking of current levels of determinants and the developments likely impacts of these levels in relation to current local EQS.

Governmental Guidance on Ammonia

Below guidance is listed on

You must submit a risk assessment of the impact of ammonia emissions from your site if either of the following apply:

Factors that could cause an increase of ammonia emissions include:

Do I Always Need a Ammonia Emissions Assessment for an Environmental Permit Application?

No not always, if you are running you your site as an installation, the Emissions for Ammonia may "Screen Out" as part of the H1 Assessment in which case detailed modeling as described above would not be required.

Please contact SWEL for a quotation.