Further Interpretation of Air Quality Modelled in Waverley from CERC
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Further interpretation of air quality modelled in Waverley, carried out for Surrey local authorities Prepared for Waverley Borough Council Final report 12th March 2020 Report Information CERC Job Number: FM1264 Job Title: Further interpretation of air quality modelling carried out for Surrey local authorities Prepared for: Waverley Borough Council Report Status: Final Report Reference: FM1264/R2/20 Issue Date: 12th March 2020 Author(s): Rohan Patel, Chetan Lad Reviewer(s): Sarah Strickland Issue Date Comments 1 18/11/19 Draft 2 12/03/20 Revised draft 3 12/03/20 Final, no changes from revised draft Main File(s): FM1264_CERC_Waverley_R3_12Mar20.pdf 1 Introduction Surrey-wide air quality modelling was undertaken by CERC and is reported in Detailed air quality modelling and source apportionment, dated 23rd August 2019. This report provides further interpretation of results for Waverley and should be read in conjunction with the Surrey-wide report. Section 2 and the accompanying spreadsheet provides details of modelled road and point sources in Waverley. Section 3 provides annual average concentration maps, focusing on the largest towns and major roads within Waverley. Section 4 provides interpretation of the sources contributing to levels of nitrogen oxides and particulates, PM10 and PM2.5, at source apportionment locations in Waverley. Section 5 provides further interpretation of the local mortality burden calculations, highlighting factors that lead to the variation in life year lost due to air pollution, on a ward-by-ward basis. Further interpretation of air quality modelling 3 2 Modelled line and point sources A map showing the modelled roads and the single point source within Waverley is shown in Figure 2.1. In this map, the thickness of the road source lines represents the magnitude of the daily traffic flows. The point source is located at Runfold Landfill in Farnham, in the north west of Waverley. Further information about the individual road sources and point sources can be found in the supplementary spreadsheet provided with this report. This includes details of modelled traffic flows and speeds for road sources and modelled source parameters for the point source. Further interpretation of air quality modelling 4 Waverley road sources (AADT) ± < 1,500 1,500 - 5,000 5,000 - 10,000 10,000 - 25,000 > 25,000 Point source 00.51 2 3 4 5 Kilometres Figure 2.1: Modelled roads and point source across Waverley Further interpretation of air quality modelling 5 3 Air quality maps 3.1 Waverley borough Contour plots were generated showing pollutant concentrations across Waverley for the year 2017: Figure 3.1 presents a contour plot of modelled annual mean NO2 concentrations Figure 3.2 presents a contour plot of modelled annual mean PM10 concentrations Figure 3.3 presents of contour plot of modelled annual mean PM2.5 concentrations The air quality standards for all three pollutants, for the protection of human health (see Section 3 of the main Surrey report) are met at all locations relevant for public exposure across Waverley. Within some major roads, the air quality standard of 40 µg/m³ for annual average NO2 concentrations is exceeded; these locations are not relevant for public exposure. Key point The air quality standards for all three pollutants, for the protection of human health are met at all locations relevant for public exposure across Waverley. The following sections provide detailed air quality maps focusing on major population centres and roads in Waverley. For each area, maps for annual average concentrations of NO2, PM10 and PM2.5 are provided. Further interpretation of air quality modelling 6 Waverley boundary Annual mean NO2 concentrations (μg/m³) < 16 ± 16 - 20 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0 1,500 3,000 6,000 Metres Figure 3.1: Annual mean NO2 concentrations for Waverley, 2017 (µg/m³) Further interpretation of air quality modelling 7 Waverley boundary Annual average PM10 concentrations (μg/m³) ± < 16 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0 1,500 3,000 6,000 Metres Figure 3.2: Annual mean PM10 concentrations for Waverley, 2017 (µg/m³) Further interpretation of air quality modelling 8 Waverley boundary Annual average PM2.5 concentrations (μg/m³) ± < 10 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0 1,500 3,000 6,000 Metres Figure 3.3: Annual mean PM2.5 concentrations for Waverley, 2017 (µg/m³) Further interpretation of air quality modelling 9 3.2 Cranleigh Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations across Cranleigh, for the year 2017, are presented in Figures 3.4 to 3.6, respectively. The area of elevated annual average PM10 concentrations in north-east Cranleigh is due to emissions from the National Atmospheric Emissions Inventory (NAEI) sector Production processes (04). Based on discussions with Waverley Council, the process giving rise to these emissions may be a historic brick works, therefore the PM10 emissions and resulting concentrations may be overestimated in this area. Note that modelled PM10 concentrations in this part of north-east Cranleigh are only up to 1 µg/m³ higher than those in the surrounding area, therefore the difference is exaggerated by the colour scale used. Further interpretation of air quality modelling 10 ± Annual average NO2 (μg/m³) < 16 16 - 20 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0 70 140 280 420 560 700 Metres Figure 3.4: Annual average NO2 concentrations for Cranleigh, 2017 Further interpretation of air quality modelling 11 Annual average PM10 (μg/m³) < 16 ± 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0 70 140 280 420 560 700 Metres Figure 3.5: Annual average PM10 concentrations for Cranleigh, 2017 Further interpretation of air quality modelling 12 Annual average PM2.5 (μg/m³) < 10 ± 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0 70 140 280 420 560 700 Metres Figure 3.6: Annual average PM2.5 concentrations for Cranleigh, 2017 Further interpretation of air quality modelling 13 3.3 Farnham Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations across Farnham for the year 2017 are presented in Figures 3.7 to 3.9, respectively. Further interpretation of air quality modelling 14 Annual average NO2 (μg/m³) < 16 16 - 20 ± 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0 125 250 500 750 1,000 Metres Figure 3.7: Annual average NO2 concentrations for Farnham, 2017 Further interpretation of air quality modelling 15 Annual average PM10 (μg/m³) < 16 ± 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0 125 250 500 750 1,000 Metres Figure 3.8: Annual average PM10 concentrations for Farnham, 2017 Further interpretation of air quality modelling 16 Annual average PM2.5 (μg/m³) < 10 ± 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0 125 250 500 750 1,000 Metres Figure 3.9: Annual average PM2.5 concentrations for Farnham, 2017 Further interpretation of air quality modelling 17 3.4 Farncombe & Godalming Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations across Farncombe & Godalming for the year 2017, are presented in Figures 3.10 to 3.12, respectively. Further interpretation of air quality modelling 18 Annual average NO 2 (µg/m³) < 16 ± 16 - 20 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0100 200 400 600 800 1,000 Metres Figure 3.10: Annual average NO 2 concentrations for Farncombe & Godalming, 2017 Further interpretation of air quality modelling 19 Annual average PM 10 (µg/m³) < 16 ± 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0100 200 400 600 800 1,000 Metres Figure 3.11: Annual average PM 10 concentrations for Farncombe & Godalming, 2017 Further interpretation of air quality modelling 20 Annual average PM 2.5 (µg/m³) < 10 ± 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0100 200 400 600 800 1,000 Metres Figure 3.12: Annual average PM 2.5 concentrations for Farncombe & Godalming, 2017 Further interpretation of air quality modelling 21 3.5 Haslemere Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations across Haslemere for the year 2017, are presented in Figures 3.13 to 3.15, respectively. Further interpretation of air quality modelling 22 Annual average NO2 (μg/m³) < 16 ± 16 - 20 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0 65 130 260 390 520 650 Metres Figure 3.13: Annual average NO2 concentrations for Haslemere, 2017 Further interpretation of air quality modelling 23 Annual average PM10 (μg/m³) < 16 ± 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0 65 130 260 390 520 650 Metres Figure 3.14: Annual average PM10 concentrations for Haslemere, 2017 Further interpretation of air quality modelling 24 Annual average PM2.5 (μg/m³) < 10 ± 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0 65 130 260 390 520 650 Metres Figure 3.15: Annual average PM2.5 concentrations for Haslemere, 2017 Further interpretation of air quality modelling 25 3.6 Hindhead Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations across Hindhead for the year 2017, are presented in Figures 3.16 to 3.18, respectively. Further interpretation of air quality modelling 26 ± Annual average NO2 (μg/m³) < 16 16 - 20 20 - 24 24 - 28 28 - 32 32 - 36 36 - 40 40 - 45 > 45 0 100 200 400 600 800 1,000 Metres Figure 3.16: Annual average NO2 concentrations for Hindhead, 2017 Further interpretation of air quality modelling 27 ± Annual average PM10 (μg/m³) < 16 16 - 18 18 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 > 45 0 100 200 400 600 800 1,000 Metres Figure 3.17: Annual average PM10 concentrations for Hindhead, 2017 Further interpretation of air quality modelling 28 ± Annual average PM2.5 (μg/m³) < 10 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20 20 - 25 > 25 0 100 200 400 600 800 1,000 Metres Figure 3.18: Annual average PM2.5 concentrations for Hindhead, 2017 Further interpretation of air quality modelling 29 3.7 A31 Detailed contour plots of annual average NO2, PM10 and PM2.5 concentrations focusing on the A31, for the year 2017, are presented in Figures 3.19 to 3.21, respectively.