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Air Quality Reports

Stages of Review and Assessment

The Borough of Poole have produced the following stages of Review and Assessment of air quality to date:

ROUND 1

Stage 1 (2000)

After considering air pollution monitoring data from both local monitoring and other national information, the report concluded that objectives for Benzene, 1,3-Butadiene, Carbon monoxide, Lead and Sulphur dioxide were already met or will achieve the set objective. It was however reported that Nitrogen Dioxide (NO2) and Particulates (PM10) may not reach the required objective by 2005.

Stage 2 (2000)

A second stage review was carried out for Nitrogen dioxide and PM10. It concluded that there was little risk that the air quality objective for both pollutants would be exceeded in the area because of road traffic emissions. The report recommended that a third stage review and assessment for PM10 and NO2 was not required. 

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ROUND 2

Updating and Screening Assessment (USA) 2003

The purpose of the USA was to identify new sources or further risks to air quality in the area and further assess the risk of exceedances of the air quality objectives.

Conclusions drawn from the report highlighted that a detailed assessment was not required for any pollutants and that air quality objectives were likely to be met. However, it was reported the NO2 diffusion tube site at Poole Road should be investigated in detail for the next progress report.

It was also suggested that any long term planning of air quality monitoring should include a review of the current monitoring locations to identify any site changes to collect more specific data.

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Progress Report 2004

All monitoring data for 2003 was assessed within this report and it highlighted that the 2005 objective to be met by 31st December 2005 for nitrogen dioxide could be at risk of exceedance at four locations. These locations were:

  • Poole Road
  • Ashley Road
  • Commercial Road
  • Mountbatten Roundabout.

The Borough of Poole concurred with the advice of DEFRA (Department of Environment Food & Rural Affairs) in September 2004 to proceed to a detailed assessment at each of these locations to assess further these risks of exceedance. The detailed assessment is currently being undertaken for the Borough of Poole by specialist air quality consultants which includes both three months of continuous monitoring at Poole Road and dispersion modelling at each of the locations. The report will be submitted to Defra in June 2005.

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Progress Report 2005

All monitoring data for 2004 was assessed within this report and it concluded that air quality is similar to that of the previous year and the Updating and Screening Assessment produced in 2003, whereby it is still likely that all of the measured pollutants and monitored sites will meet the objectives set for 2005 and 2010, with the exception of those sites currently under Detailed Assessment; Poole Road, Ashley Road, Commercial Road and the Mountbatten Roundabout.  

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Detailed Assessment 2005

Results of the Detailed Assessment at Poole Road and Commercial Road show that annual average Nitrogen Dioxide levels for 2005 will meet the objective limit of 40µg/m3.

However, there were two sites where levels of Nitrogen Dioxide exceeded the recommended limit of 40µg/m³ - at Ashley Road and the Mountbatten Arms roundabout. The Detailed Assessment recommended that the Borough of Poole should declare these sites AQMA’s. However, the diffusion tubes at these localities were situated at kerbside locations where relevant exposure did not take place, thus not providing information on concentrations at locations where members of the public were regularly present.

Therefore the tubes at the Mountbatten Arms roundabout site were relocated to a site where public exposure does take place; at Dolberry Road South, and continuous monitoring was undertaken over a three month period at Ashley Road and results indicated that we are meeting our objectives at this locality too.

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Updating and Screening Assessment (USA) 2006

The purpose of the USA was to identify new sources or further risks to air quality in the area and further assess the risk of exceedances of the air quality objectives. Conclusions from the report show that a detailed assessment is not required for any of the measured pollutants and that air quality objectives are likely to be met. However, the report also recommended PM10 monitoring points to be set up at both background and roadside locations to assess levels.

Two locations, Ashley Road and Mountbatten Roundabout were subject to further monitoring for Nitrogen Dioxide. At the Ashley Road location, updated dispersion modelling in April 2006, verified by continuous monitoring for a three month period, revealed that there are no relevant receptors in any areas where Nitrogen Dioxide levels could be close to exceedance. The report recommended a longer period of automatic monitoring at a relevant receptor at this location to demonstrate compliance with the objective for Nitrogen Dioxide.

Diffusion tube monitoring was moved from Mountbatten Roundabout to Dolberry Road South where relevant exposure occurs. The report recommended a longer period of observations at this site, although the results to date indicate no exceedances. There was therefore no requirement for declaring an AQMA at either of these sites.

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Detailed Assessment 2006

The relocation of diffusion tube monitoring from Mountbatten Arms to Dolberry Road South to determine Nitrogen Dioxide levels at the site of relevant receptors showed no exceedances of the air quality objective to date.

Three months of continuous chemiluminescence monitoring for Nitrogen Dioxide at a roadside location in Ashley Road allowed updating of the modelled predictions in the Detailed Assessment in 2005. The results show that although it is likely that annual average Nitrogen Dioxide levels are close to exceedance only along the southern side of Ashley Road in 2005, there are no areas of exceedance where relevant receptors are located. Thus there was no requirement to declare an AQMA at this site. It was recommended that more diffusion tube monitoring be undertaken at sites along Ashley Road, especially along the southern side, to allow continuous review of the situation.

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ROUND 3

Progress Report 2007

All monitoring data for 2006 was assessed within this report and it is likely that all measured pollutants will meet the required objectives for both 2005 and 2010 at all locations with the exception of:

  • Commercial Road
  • Longfleet Road
  • Ashley Road

At these locations the annual average Nitrogen Dioxide exceeded the 40µg/m3 UK objective. Consequently, a Detailed Assessment will be undertaken at Commercial Road and Longfleet Road.

A previous Detailed Assessment at Ashley Road in 2006 demonstrated that there was no exceedance of the Nitrogen Dioxide objective at this site. However, the Borough of Poole will collect detailed traffic information in order to implement traffic management plans and mitigate any future increases in Nitrogen Dioxide levels.

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Detailed Assessment 2008

The aim of this Detailed Assessment was to determine if there was a likelihood of exceedance of the 40µg/m3 UK objective for the two sites identified in the Progress Report 2007 at Commercial Road and Longfleet Road. Thus three months of continuous chemiluminescence monitoring was undertaken at Commercial Road and dispersion modelling was undertaken at both sites.

Modelling showed that exceedance was possible in 2007 at two relevant receptors in Commercial Road and probable at several receptors in Longfleet Road. However, the report recommended that more extensive diffusion tube monitoring is undertaken at both sites to obtain further data to input into the dispersion model to enable improved verification, and thus four further diffusion tubes were placed within areas identified in the report as possible or probable exceedances.

Update to Detailed Assessment 2008

Detailed dispersion modelling was undertaken at two areas in Poole based on extra monitoring with diffusion tubes at Commercial Road and Longfleet Road. This assessment updates the results detailed in the 2008 Detailed Assessment and provides an improved model verification in accordance with the latest technical guidance, LAQM.TG(09).

Commercial Road

Contour plots at ground floor height indicate very likely exceedances of the air quality objective at the street canyon in 2007. At ground floor height, the plots show very likely exceedances of the objective at two properties i.e. above 48 µg/m3 with respect to annual mean concentrations. By 2010, exceedances of the objective are likely at these properties. However, the ground floor of these properties are occupied for commercial use, therefore the air quality objective does not applies at these locations.
Predictions at a worst-case first floor height of 3.0 meters, where representative exposure exists, indicate probable exceedances of the annual mean objective at one location – 2 Station Road in 2007. Modelling at this location for 2010 shows unlikely exceedances of the objective.

Longfleet Road

The plots produced from this study suggest that maximum concentrations of NO2 are likely to occur at Longfleet Road, near Poole General Hospital. As receptors are located farther away from the kerb, concentrations experienced at these locations are not considered to be of particular concerned. Exceedances of the annual mean NO2 objective are likely to be possible at a few residential properties in 2007 near the junction of High Street with Elizabeth Road. By 2010, unlikely exceedances of the objective are predicted at this location.
Modelling at sensitive receptors indicated probable exceedences of the annual mean objective at two properties in 2007. At these locations, unlikely exceedances of the objective are predicted for 2010.

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ROUND 4

Updating and Screening Assessment 2009

The purpose of the USA was to identify new sources or further risks to air quality in the area and further assess the risk of exceedances of the air quality objectives.

Conclusions from the report showed that a detailed assessment was required for Nitrogen Dioxide at Ashley Road.

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Progress Report 2010

Monitoring results showed a general decrease in levels of NO2 in all locations except Ashley Road and Commercial Road. However, a calculation of fall-off in the level of NO2 with distance at these locations showed that the concentrations both decreased to below the objective level at locations with relevant exposure.

The Further Assessment at Commercial Road, subsequent to the declaration of the AQMA in 2010 was being completed, as was the Detailed Assessment at Ashley Road.

Monitoring for benzene showed no exceedance of the Air Quality Objective. Ozone and SO2 monitoring remained similar to previous years, again with a slightly decreasing trend. These results, combined with financial pressures, resulted in the decision to cease future monitoring of benzene, ozone and sulphur dioxide.

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Further Assessment 2011

The annual mean objective for NO2 was exceeded within the AQMA at Commercial Road and at locations of relevant exposure outside of the AQMA.
The report recommended that the AQMA be extended to include, as a minimum, the properties along Commercial Road where new exceedance of the 2010 objective was identified within the report. However, as no monitoring had been undertaken here, the Borough of Poole decided to undertake a six month diffusion tube  monitoring programme at specific properties, to be reported within this USA. Monitoring results are thus presented in Section 2: New Monitoring Data.

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Detailed Assessment 2011

The annual mean objective for NO2 was exceeded at a number of locations along Ashley Road. However, there was no exceedance greater than 60µg/m3 identified at locations of relevant exposure.  Therefore the report recommended that an AQMA was declared for the annual mean NO2 objective to include those properties where an exceedance of the objective was identified.

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Further Assessment 2012

Updated  monitoring  and  modelled  results  confirmed  that  the  Ashley  Road  AQMA  was  still required in Poole, as the NO2 annual mean objective was still likely to be exceeded at relevant receptor  locations.  It was recommended that the  extent  of  the  AQMA  be  extended  to  include  all  properties along Ashley Road between 467 Ashley Road and Jubilee Road. The extension was approved in April 2013 and this information will be submitted to Defra shortly.
Source  apportionment  revealed  that,  road  traffic  pollution  levels  contributed  significantly  to the  overall  NOx  and  NO2  levels,  respectively.    Of the road traffic emissions, Heavy-Duty Vehicles (HGVs and buses) were the most significant contributors followed by cars.
The  report stated that the maximum  reduction  in  NOx  concentrations  (associated  with  road  traffic)  required  to comply  with  the  AQS  objectives  in  the  AQMA  is  equivalent  to  a  33% reduction  in  road-NOx  levels.  This equates to about 17% reduction  in  NO2.
Based on a population exposure calculation, it was estimated that 216 people are exposed to exceedances of the NO2 annual mean AQS objective on Ashley Road.
The report estimated that the annual mean objective would be met at all locations by 2014, although recent monitoring trends across the UK show that projected concentrations are likely to be underestimated.

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Updating and Screening Assessment 2012

None of the UK air quality objectives for the six pollutants (1,3-butadiene, benzene, lead, sulphur dioxide (SO2), carbon monoxide (CO) and particulate matter (PM10)) are likely to be exceeded within the Borough.  Therefore, a Detailed Assessment will not be required for any of the six key pollutants.
For the pollutant nitrogen dioxide (NO2), monitoring data has indicated exceedances of the annual mean NO2 objective at Ashley Road and Commercial Road, both of which are AQMAs.
Following the submission of the USA, the Council aim to undertake these actions:
  • Continue with air quality monitoring at existing sites;
  • Review air quality monitoring locations to ensure relevant exposure is being assessed correctly at each site.
  • Produce an Air Quality Action Plan for both Commercial Road and Ashley Road
  • Review the impact of the traffic management schemes at Ashley Road and Commercial Road to reduce congestion and thus air quality.

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Progress Report 2013

Two sites within the Borough of Poole continue to show exceedance of the Air Quality Objective for Nitrogen Dioxide (NO2 ) of 40 µg/m3 – at Ashley Road and Commercial Road. Air Quality Management Areas (AQMAs) have been declared at both of these locations and will remain in place. An Air Quality Action Plan (AQAP) will be submitted to DEFRA for the Ashley Road AQMA area, detailing actions to be implemented in order to achieve an improvement in air quality. Further monitoring locations will be set up within each AQMA to supplement the current monitoring data and increase understanding of the situation before and after improvement works as part of the AQAP.

All other monitoring sites around the Borough continue to meet the AQO for NO2 , therefore there is no need to proceed to Detailed Assessment at these locations.

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Latest Reports

The latest reports can be downloaded using the links at the side of the page.