20260727 04380500 1.0 FALSE ENVIRONMENT.BACKGROUND_AIR_POLLUTION_PM25_NEW 002 444000.000122 489000.000122 322000.000122 401000.000122 1 20260706 16004200 20260707 17474800 500000 5000 INSPIRE a68dbc23-674b-434e-8954-541558b8b9a7 dataset GIS Team Nottingham City Council Loxley House, Station Street Nottingham NG2 3NG gi@nottinghamcity.gov.uk GB GIS Team 20260707 ArcGIS Metadata 1.0 Enterprise Geodatabase Feature Class Background Air Pollution: PM25 2019-06-04T00:00:00 2019-06-04T00:00:00 2026-07-07T00:00:00 <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="text-align:Justify;margin:0 0 14 0;"><SPAN>Air pollution background concentration maps are published by Defra and the Devolved Administrations to assist local authorities in carrying out Review and Assessment of local air quality as part of their duties under the Environment Act 1995, as amended in 2021. The background maps contain estimates of pollutant concentrations based on an average over a year (annual average). this is measured in micrograms per cubic meter (µg/m3).</SPAN></P><P STYLE="text-align:Justify;margin:0 0 14 0;"><SPAN>The main purpose of the background maps is to provide estimates of background concentrations for specific pollutants. These can then be used in air quality assessments to better understand the contribution of local sources to total pollutant concentrations. They provide information on how pollutant concentrations change over time and across a wide area. They also provide an estimated breakdown of the relative sources of pollution. The maps allow for the assessment of new pollutant sources that are introduced into an area and the impact they may have upon local air quality.</SPAN></P><P><SPAN STYLE="font-size:12pt">UK background maps are made available for a reference year and projection years for a range of pollutants including oxides of nitrogen (NOx), nitrogen dioxide (NO2) and particulate matter (PM10 and PM2.5).</SPAN></P><P STYLE="text-align:Justify;margin:0 0 14 0;"><SPAN>New background maps are released by Defra periodically due to updates to the underlying data, including emissions factors. Local authorities should use the most up-to-date data and supporting tools made available, which have been updated for their use with the 2021 reference year maps. </SPAN></P></DIV></DIV></DIV> © Crown copyright 2024 Defra via uk-air.defra.gov.uk, licenced under the Open Government Licence (OGL). GIS Team Nottingham City Council 0.0001 0 9.00719925474099E+15 -1.24187418904942 -1.09060450553409 53.0175609180532 52.890666322578 Esri ArcGIS 13.3.4.52636 1 -1.347407 -0.658176 53.503600 52.787892 https://uk-air.defra.gov.uk/data/laqm-background-home https://laqm.defra.gov.uk/air-quality-assessment/#about https://laqm.defra.gov.uk/air-quality/air-quality-assessment/background-maps/ <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>These background mapped data are specifically for LAQM purposes only. Please use them in conjunction with reading the </SPAN><A href="https://laqm.defra.gov.uk:443/air-quality-assessment/" STYLE="text-decoration:underline;"><SPAN>Background Maps User Guide</SPAN></A><SPAN>. </SPAN></P><P><SPAN>Only the most recent mapped data should be used for new air quality assessments. Older data can continue to be used for research or on-going assessments.</SPAN></P></DIV></DIV></DIV> Environmental Health Nottingham City Council environmental.health@nottinghamcity.gov.uk Environmental Health Background maps are updated by Defra periodically due to updates to underlying data, including emissions factors. Local authorities should use the most up-to-date data and supporting tools made available. UK background maps are made available for a reference year and projection years for a range of pollutants including oxides of nitrogen (NOx), nitrogen dioxide (NO2) and particulate matter (PM10 and PM2.5). The current base reference year for the data is 2021 and the projections are available up until 2040 for NOx, NO2, PM10 and PM2.5. Available as 1x1km grid file of concentrations for each local authority (per pollutant). Maps are used for all new air quality assessments. Defra: LAQM 2171 EPSG 6.3(3.0.1) ENVIRONMENT.BACKGROUND_AIR_POLLUTION_PM25_NEW Feature Class 2171 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. X x Double 8 38 8 Y y Double 8 38 8 TOTAL_PM25_2022 2022 Double 8 38 8 TOTAL_PM25_2024 2024 Double 8 38 8 TOTAL_PM25_2026 2026 Double 8 38 8 TOTAL_PM25_2021 Reference Year 2021 Double 8 38 8 TOTAL_PM25_2028 2028 Double 8 38 8 TOTAL_PM25_2023 2023 Double 8 38 8 TOTAL_PM25_2025 2025 Double 8 38 8 TOTAL_PM25_2027 2027 Double 8 38 8 TOTAL_PM25_2029 2029 Double 8 38 8 TOTAL_PM25_2030 2030 Double 8 38 8 TOTAL_PM25_2031 2031 Double 8 38 8 TOTAL_PM25_2032 2032 Double 8 38 8 TOTAL_PM25_2033 2033 Double 8 38 8 TOTAL_PM25_2034 2034 Double 8 38 8 TOTAL_PM25_2035 2035 Double 8 38 8 TOTAL_PM25_2036 2036 Double 8 38 8 TOTAL_PM25_2037 2037 Double 8 38 8 TOTAL_PM25_2038 2038 Double 8 38 8 TOTAL_PM25_2039 2039 Double 8 38 8 TOTAL_PM25_2040 2040 Double 8 38 8 SHAPE SHAPE Geometry 8 0 0 Feature geometry. Esri Coordinates defining the features. SHAPE.AREA SHAPE.AREA Double 0 0 0 SHAPE.LEN SHAPE.LEN Double 0 0 0 Simple FALSE 2171 TRUE FALSE