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Air Quality

East Herts Council regularly reviews the air quality within our District.

As a local authority our responsibilities relating to air quality management come from legislation laid out in the UK Air Quality Strategy.

Poor air quality across the country continues to adversely affect people's health at significant public cost. We are committed to regularly reviewing our district's air quality so that we can inform our strategy and our ongoing Air Quality Action Plan. A detailed list of the pollutants that we measure for is available via the Department for Energy, Food and Rural Affairs.

Any area within East Herts not meeting National Air Quality Standards is declared as an Air Quality Monitoring Area (AQMA). Where an AQMA is declared, action needs to be taken to reduce pollution levels.  An action plan must also be produced to tackle the problem. To view the district's air quality action plan this can be found in the downloads bar.


There are three AQMAs in East Herts as shown below.

Air Quality Maps

Gascoyne Way, Hertford

London Road, Sawbridgeworth

Bishop's Stortford, Hockerill Junction

Assessments & Reports

ReportComments/Results
Annual Status Report 2017 [1Mb]Air Quality Annual Status Report 2017
Air Quality Annual Status Report (ASR) 2016 [776kb]Air Quality Annual Status Report 2016
Air Quality Updating and Screening Assessment 2015 [1Mb]The results from the continuous air quality monitoring stations show that the air quality objectives that Local Authorities are required to meet were achieved in 2014. The diffusion tube data shows that the air quality objectives are unlikely to be met at 11 locations in the district, all of which are within an AQMA.  Consequently a detailed assessment is not required.
Air Quality Progress Report - April 2014 [1Mb]The results from the continuous air quality monitoring stations show that the air quality objectives that Local Authorities are required to meet were achieved at both the Background and Roadside monitors.  East Herts Council has a network of 42 diffusion tubes, located at 19 different sites.  Diffusion tubes at 11 of these sites recorded an annual mean above the objective of 40µg/m3.   These have either already been subject to detailed assessment and are awaiting the declaration of an Air Quality Management Area (AQMA), or are located within an existing AQMA.  The diffusion tube located on Viaduct Road Ware recorded nitrogen dioxide equal to the Annual Mean Objective.
Air Quality at London Road, Sawbridgeworth - Detailed Assessment - April 2013 [1Mb]The review and assessment process had identified levels of Nitrogen Dioxide above the national objective predominantly in the London Road area of Sawbridgeworth.  Consequently AQC were commissioned to carry out a detailed assessment on their behalf.  The assessment concluded that an AQMA should be declared along London Road and sections of Cambridge Road and Bonks Hill. There is no longer a requirement to complete a Further Assessment within 1 year of declaring an AQMA.  An action plan is required within 18 months.
Air Quality Progress Report 2013 [2Mb]The results from the continuous air quality monitoring stations show that the air quality objectives that Local Authorities are required to meet was achieved at the background monitor. However the East Herts Roadside monitoring station failed the annual objective for Nitrogen Dioxide. East Herts Council has a network of 37 diffusion tubes 21 of which exceed the annual mean objective of 40μg/m3. Most of these have already been subject to detailed assessment or are located within an Air Quality Management Area (AQMA). The remaining diffusion tubes are located at London Road, Sawbridgeworth where East Herts Council has commissioned AQC to carry out a detailed assessment.
Air Quality Updating and Screening Assessment 2012 [2Mb]The 2012 Updating and Screening Assessment (USA) concluded that the results from the continuous air quality monitoring stations demonstrated that the air quality objectives required to be met by Local Authorities were achieved in 2010.  The diffusion tube data also showed that the air quality objectives are unlikely to be met at 11 locations in the district, 9 of which have already been subject to detailed assessment or are located within an Air Quality Management Area (AQMA). It is proposed to apply for a grant to carry out a detailed assessment on London
Road, Sawbridgeworth.
County District Air Quality Action Plan - East Herts [120kb]Where local authorities have designated any AQMAs, they have a duty to produce an action plan. This plan must set out what measures the authority intends to introduce in pursuit of the Air Quality Objectives. It should also include timescales to indicate by when the measures will be implemented. Local authorities are not obliged to meet the objectives but they must show that they are working towards them. Where the AQMA designation arises primarily because of transport pollution, local authorities in England will have the freedom to integrate their action plans into their Local Transport Plans (LTPs). In such cases, the Government will no longer require the production of a separate action plan.East Herts District Council has been working with Herts County Council in the development of the action plan.
Air Quality Further Assessment - Gascoyne Way, Hertford 2011 [797kb]The further assessment is intended to 'supplement such information as East Herts has in relation to the designated area in question'. The degree of thoroughness of the further assessment will therefore depend upon the information the authority has already accrued about the area to be designated/extended or about the pollution levels/sources within the AQMA. Local authorities are required to carry out a further assessment within 12 months of designating the AQMA. The report concluded that the AQMA should be extended.
Air Quality Annual Progress Report 2011 [1Mb]In April 2010 East Herts Council submitted an annual progress report to Defra. This report reviewed the data collected from the Local Authority's monitoring sites. Results from the additional diffusion tubes placed on Viaduct Road, Ware indicated that the air quality in the area meet the objectives. However a detailed assessment is required in London Road, Sawbridgeworth.
Air Quality Annual Progress Report 2010 [470kb]In April 2010 East Herts Council submitted an annual progress report to Defra. This report reviewed the data collected from the Local Authority's monitoring sites.  As a result of the report the further assessment of the AQMA in Gascoyne way was to include a detailed assessment of the surrounding area to assess a possible extension.
Air Quality Viaduct Road, Ware Detailed Assessment 2010 [308kb]In 2009, East Herts Council completed an Updating and Screening Assessment, which concluded that a Detailed Assessment was required, due to measured exceedences of the annual mean nitrogen dioxide objective. The aim of this Detailed Assessment is to determine whether the air quality objectives are being exceeded at locations of relevant exposure alongside Viaduct Road, and if so, the extent of the Air Quality Management Area required. The report highlighted that there some uncertainty surrounding the measured concentrations of NOon Viaduct Road. Additional diffusion tube monitoring was set up in the area and the area would be reassessed in the 2011 Progress Report.
Air Quality Management Area Order 2010 - Gascoyne Way, Hertford [36kb] 
Air Quality Hertford Details Assessment 2009 [595kb]In the 2009 Updating and Screening Assessment, the council had identified a risk that an air quality objective will be exceeded along Gascoyne Way, Hertford. The authority was therefore required to undertake a Detailed Assessment  The aim of this Detailed Assessment is to identify with reasonable certainty whether or not a likely exceedence will occur and possibly declare an Air Quality Management Area. The assessment identified locations where the annual mean nitrogen dioxide objective is being exceeded at locations of relevant exposure along Gascoyne Way. AN AQMA was declared in May 2010.
Air Quality Annual Progress Report 2008 [477kb]The further assessment is intended to 'supplement such information as East Herts has in relation to the designated area in question'. The degree of thoroughness of the further assessment will therefore depend upon the information the authority has already accrued about the area to be designated/extended or about the pollution levels/sources within the AQMA. Local authorities are required to carry out a further assessment within 12 months of designating the AQMA.
Air Quality Annual Progress Report 2007 [396kb]In April 2007 East Herts Council submitted an annual progress report to DEFRA. This report reviewed the data collected from the Local Authority's monitoring site.  This report included a review of the diffusion tube locations and Declaration of Air Quality Management Order 2007.
Air Quality Further Assessment - Hockerill Junction 2008 [190kb] 
Air Quality Updating and Screening Assessment 2009 [351kb] 
Air Quality Updating and Screening Assessment 2006 [354kb]In April 2006 East Herts Council reviewed the air quality across the district to establish if there were any areas previously unidentified that would need further investigation.  This report considers the conclusions drawn in previous reporting and any new sources of pollution since the last round of Review and Assessment, in order to establish the risk of exceedances of the Air Quality Objectives in areas of public exposure.  The repot's aim is to identify where necessary the need for further assessment.
Air Quality Progress Report - August 2005 [2Mb]In August 2005 East Herts Council submitted an Air Quality Progress Report to DEFRA.  This report included additional monitoring undertaken to establish if there was  a legal requirement to declare Air Quality management Areas in Ware (Viaduct Road) and Bishop's Stortford (Hockerill Street/London Road junction).  This report also provides a general review  of the monitoring undertaking in the district.
Air Quality Updating and Screening Assessment 2003 [322kb]This report identified that Particles and Nitrogen Dioxide continue to remain the two most concerning pollutants for our district.  Monitoring continues for particles at two locations in Sawbridgeworth and for Nitrogen Dioxide at 26 locations using a diffusion tube method.
Air Quality Modelling Study Report [1Mb]In February 2005 a detailed investigation into levels of Nitrogen dioxide in Viaduct Road, Ware and London Road, Bishop's Stortford was completed. 
Air Quality Stage Three Review [26kb] 
Review and Assessment - Stage Four [935kb]