Air Quality Assessment
for planning applications

An Air quality assessment is now often needed for all planning applications for new dwellings, or developments where there will be increased traffic. With detailed dispersion models and professional air quality monitoring equipment available to us, as Air Quality Consultants, we can offer a range of services relating to air quality, including dust and odour.

air quality

air quality

Air quality assessments for residential developments will include a site suitability study. This will assess whether the site has low levels of pollution and assess whether the site is suitable for housing. If traffic will be generated by the development, we can look at the traffic impact. This check whether the traffic generated by the development will have an impact on the air quality of the area.

We can also undertake air quality neutral assessments to check whether a development in London adheres to Section 9 of the London Plan. For developments close to European designated nature sites, we can conduct Habitats Regulations Assessments (HRA).

Odour

Odour

Odour assessments are often required in urban town centre locations. This is especially true where new residential development is proposed close to restaurants and takeaways. We are qualified to conduct odour assessments to assess whether odours from adjacent land uses such as fast-food restaurants, are expected to cause complaints from future residents.

We can model odour using air quality assessment modelling software, to check whether new buildings have an impact on how odour is perceived in the environment through changes in dispersion.

Dust

Dust

At Hawkins Environmental we offer a range of services concerning dust. For most planning applications, a construction dust risk assessment is required as part of an air quality assessment. This is to check whether the development of the site would have an impact on pollution during construction. We often write Dust Management Plans for the construction phase of a development.

As well as considering construction dust in the air quality assessment, we can consider where the proposed development is to be affected by operational dust. For example, as air quality consultants, we can carry out dust monitoring to check whether dust from sites like quarries, will affect proposed development sites and assess whether they will be suitable for housing.

Get Your Air Quality Assessment Sorted

If your planning application involves new dwellings, added traffic, or is located in a sensitive area, an air quality assessment may be required. We provide expert reports including dispersion modelling, dust and odour assessments, and full compliance with Defra, IAQM, and London Plan requirements.

Air Quality
Assessment

An air quality assessment is used to address the impact of the development on air pollution. Air quality assessment consultants can evaluate both the construction phase and operational impacts. For example, assessments consider traffic-related pollution and emissions from onsite plant such as gas boilers, biomass, and CHP systems. These reports measure onsite air pollution concentrations and determine compliance with national standards.

Air quality assessments also help identify whether the location is suitable for residential use or if mitigation, such as mechanical ventilation, is necessary. Engaging an experienced air quality assessment consultant ensures accurate analysis and supports successful planning applications.

What type developments need an air quality assessment?

Developments of any size will need an air pollution report. Councils are will ask for a report for any residential development in area where there is poor air quality. Similarly, any development that will generate any traffic or have any polluting plant will need an air quality report, especially if it located within, or close to, air area where air pollution is high. All developments in London need to be air quality neutral. Almost all developments in London will need at least a basic air quality assessment.

What type of assessments do you offer?

As specialist Air Quality Consultants, we can offer a range of air quality assessments and air pollution reports, including:

  • Detailed Air Quality Assessments for residential developments
  • Detailed Dispersion Modelling
  • Air Quality Neutral Assessments
  • Air Quality Positive Statements
  • Air Quality Monitoring
  • Construction Dust Assessment
  • Air Quality & Dust Management Plans
  • Odour Assessment
  • Dust Monitoring
  • Kitchen Extract Odour Risk Assessment
What standards do you use?

All of our assessments are been undertaken according to Defra’s current Technical Guidance on Local Air Quality Management  (TG22) and the IAQM’s Land-Use Planning & Development Control: Planning for Air Quality (January 2017). Construction impacts on air quality are assessed according to the IAQM’s 2024 edition of the Guidance on the assessment of dust from demolition and construction.

What pollutants do you assess?

Our assessments consider the legal limits of Nitrogen Dioxide (NO2), as well as particulate matter (PM10 and PM2.5). Although not normally a problem in the UK, we can also assess concentrations of sulphur dioxide, carbon monoxide, lead and benzene.

What are the stages of an air quality assessment?

The main stages are:

  • A screening assessment, to check what type of study is required
  • Baseline air quality review, including review of existing air quality monitoring data. This will also assess whether the site is within an Air Quality Management Area (AQMA)
  • Construction of a detailed dispersion model, using local traffic data and background data. The model is then validated using local air pollution data.
  • Prediction of future air pollution levels on site to check site suitability and ventilation requirements
  • Using predicted traffic generation, assess the impact of the proposed development on air quality using the air quality model
  • Consider the impact from polluting plant (gas boilers, Combined Heat & Power)
  • Carry out a construction dust risk assessment and make recommendations for a Dust Management Plan if required
  • Conduct an Air quality neutral assessment (required in London only)
  • Consider the impact of the development on ecological receptors (Habitat Regulations Assessment – HRA)
  • Conduct a damage cost analysis if local planning policy requires.
Do you do air quality monitoring?

Most air quality assessments are desk based studies and don’t need air quality monitoring. If required, we are can conduct nitrogen dioxide diffusion tube monitoring, as well as dust monitoring via deposition gauges and automatic monitoring stations. These can give real-time feedback on air pollution levels. This is especially useful for construction dust monitoring.

The legal limits are as follows:

  • NO2 –  40 µg/mon average over a calendar year
  • NO2 – 200 µg/mon average over one hour (not to be exceeded more than 18 times per calendar year)
  • PM10 – 40 µg/mon average over a calendar year
  • PM10 – 50 µg/mon average over one day (not to be exceeded more than 35 times per calendar year)
  • PM2.5 – 20 µg/mon average over a calendar year (and reducing to 10 µg/mby 2040)