SmogRank / Episodes / France
France, Belgium and United Kingdom, November and December 2023
For 3 days, from 30 November to 2 December 2023, 43 cities in France, Belgium, the United Kingdom and 1 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Cork, Munster, Ireland: 53.3 µg/m³ on 2 December, about 7.5× its usual 7.1.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 43 in 4 countries
Days 3 30 November to 2 December 2023
Worst day 2 December 36 cities counted
Furthest above usual 7.5× Cork
Day by day
Play 2 December 36 cities at twice their usual or more
Saint-Brieuc Rennes Caen Vannes Southampton Portsmouth Lorient Couëron Newton Abbot Andover Le Havre Alençon Plymouth Reading Brighton Saltash Cardiff Brest Newport Seaford Oxford Barnstaple Hayes London Briton Ferry Bexley Royal Leamington Spa La Rochelle Dartford Dagenham Grays Birmingham Gillingham Biggleswade Dreux Canvey Island Chartres Canterbury Nottingham Rambouillet Newmarket Chesterfield Clacton-on-Sea Olivet Angoulême Speke Sheffield Étampes Irlam Manchester Liverpool Domont Barnsley Paris Sarcelles Châteauroux Creil Preston Leeds Norwich Fontainebleau Périgueux Kingston upon Hull York Bourges Lens Koksijde Marmande Saint-Quentin Tournai Nevers Auxerre Dublin Épernay Gent Reims Mons Clermont-Ferrand Aurillac Troyes Charleroi Brussels Grimbergen Willebroek Kapellen Montceau-les-Mines Saint-Dizier Aarschot Andenne Dijon Chalon-sur-Saône Verdun Mol Mâcon Saint-Étienne Marche-en-Famenne Saint-Chamond Flémalle-Haute Lyon Givors Meyzieu Bourg-en-Bresse Valence Romans-sur-Isère Izegem Lochristi Waregem Antwerp Maldegem Stabroek Bordeaux Beveren Angers Denain Melun Dieppe Sainte-Geneviève-des-Bois Roubaix Menen Nantes Lille Kortrijk Zwijndrecht Valenciennes Coulommiers Roeselare La Roche-sur-Yon Lisieux Rouen Douai Evergem Béthune Lormont Évreux Poitiers Amiens Dunkirk Blois Louviers Tours Dún Laoghaire Joué-lès-Tours Wigan Bristol Stoke-on-Trent Warrington Cork 27 Nov 28 29 30 1 Dec 2 3 4 5 Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.
How it spread
Sainte-Geneviève-de… Sainte-Geneviève-des-Bois, 27 November: 10.6 µg/m³, 0.9× usual Sainte-Geneviève-des-Bois, 28 November: 23.4 µg/m³, 1.9× usual Sainte-Geneviève-des-Bois, 29 November: 35.8 µg/m³, 2.9× usual Sainte-Geneviève-des-Bois, 30 November: 24.9 µg/m³, 2.0× usual Sainte-Geneviève-des-Bois, 1 December: 25.9 µg/m³, 2.1× usual Sainte-Geneviève-des-Bois, 2 December: 40.6 µg/m³, 3.3× usual Sainte-Geneviève-des-Bois, 3 December: 30.4 µg/m³, 2.5× usual Sainte-Geneviève-des-Bois, 4 December: 9.3 µg/m³, 0.8× usual Sainte-Geneviève-des-Bois, 5 December: 9.0 µg/m³, 0.7× usual Nantes Nantes, 27 November: 5.1 µg/m³, 0.6× usual Nantes, 28 November: 13.3 µg/m³, 1.6× usual Nantes, 29 November: 25.4 µg/m³, 3.1× usual Nantes, 30 November: 13.9 µg/m³, 1.7× usual Nantes, 1 December: 18.5 µg/m³, 2.3× usual Nantes, 2 December: 27.3 µg/m³, 3.4× usual Nantes, 3 December: 15.8 µg/m³, 2.0× usual Nantes, 4 December: 5.8 µg/m³, 0.7× usual Nantes, 5 December: 7.1 µg/m³, 0.9× usual Bordeaux Bordeaux, 27 November: 15.7 µg/m³, 2.0× usual Bordeaux, 28 November: 14.9 µg/m³, 1.9× usual Bordeaux, 29 November: 25.1 µg/m³, 3.1× usual Bordeaux, 30 November: 6.3 µg/m³, 0.8× usual Bordeaux, 1 December: 7.1 µg/m³, 0.9× usual Bordeaux, 2 December: 25.2 µg/m³, 3.2× usual Bordeaux, 3 December: 17.4 µg/m³, 2.2× usual Bordeaux, 4 December: 5.6 µg/m³, 0.7× usual Bordeaux, 5 December: 15.6 µg/m³, 2.0× usual Evergem Evergem, 27 November: 7.4 µg/m³, 0.8× usual Evergem, 28 November: 9.5 µg/m³, 1.1× usual Evergem, 29 November: 10.2 µg/m³, 1.1× usual Evergem, 30 November: 33.0 µg/m³, 3.7× usual Evergem, 1 December: 29.6 µg/m³, 3.3× usual Evergem, 2 December: 25.9 µg/m³, 2.9× usual Evergem, 3 December: 20.0 µg/m³, 2.2× usual Evergem, 4 December: 10.6 µg/m³, 1.2× usual Evergem, 5 December: 19.3 µg/m³, 2.1× usual Dunkirk Dunkirk, 27 November: 5.0 µg/m³, 0.6× usual Dunkirk, 28 November: 5.7 µg/m³, 0.7× usual Dunkirk, 29 November: 16.1 µg/m³, 1.9× usual Dunkirk, 30 November: 31.4 µg/m³, 3.6× usual Dunkirk, 1 December: 34.6 µg/m³, 4.0× usual Dunkirk, 2 December: 25.2 µg/m³, 2.9× usual Dunkirk, 3 December: 23.2 µg/m³, 2.7× usual Dunkirk, 4 December: 12.2 µg/m³, 1.4× usual Dunkirk, 5 December: 8.4 µg/m³, 1.0× usual Douai Douai, 27 November: 6.3 µg/m³, 0.8× usual Douai, 28 November: 10.0 µg/m³, 1.2× usual Douai, 29 November: 13.1 µg/m³, 1.6× usual Douai, 30 November: 31.0 µg/m³, 3.7× usual Douai, 1 December: 28.2 µg/m³, 3.4× usual Douai, 2 December: 27.3 µg/m³, 3.3× usual Douai, 3 December: 19.0 µg/m³, 2.3× usual Douai, 4 December: 7.3 µg/m³, 0.9× usual Douai, 5 December: 12.4 µg/m³, 1.5× usual Menen Menen, 27 November: 7.2 µg/m³, 0.8× usual Menen, 28 November: 11.7 µg/m³, 1.3× usual Menen, 29 November: 17.1 µg/m³, 1.9× usual Menen, 30 November: 28.8 µg/m³, 3.3× usual Menen, 1 December: 29.1 µg/m³, 3.3× usual Menen, 2 December: 26.1 µg/m³, 3.0× usual Menen, 3 December: 20.6 µg/m³, 2.3× usual Menen, 4 December: 9.1 µg/m³, 1.0× usual Menen, 5 December: 16.4 µg/m³, 1.9× usual Izegem Izegem, 27 November: 9.5 µg/m³, 0.9× usual Izegem, 28 November: 10.8 µg/m³, 1.0× usual Izegem, 29 November: 15.2 µg/m³, 1.4× usual Izegem, 30 November: 28.7 µg/m³, 2.7× usual Izegem, 1 December: 30.0 µg/m³, 2.8× usual Izegem, 2 December: 28.1 µg/m³, 2.7× usual Izegem, 3 December: 22.3 µg/m³, 2.1× usual Izegem, 4 December: 10.4 µg/m³, 1.0× usual Izegem, 5 December: 18.8 µg/m³, 1.8× usual Beveren Beveren, 27 November: 7.0 µg/m³, 0.8× usual Beveren, 28 November: 8.4 µg/m³, 1.0× usual Beveren, 29 November: 7.3 µg/m³, 0.8× usual Beveren, 30 November: 28.1 µg/m³, 3.2× usual Beveren, 1 December: 22.8 µg/m³, 2.6× usual Beveren, 2 December: 24.9 µg/m³, 2.9× usual Beveren, 3 December: 17.9 µg/m³, 2.1× usual Beveren, 4 December: 9.4 µg/m³, 1.1× usual Beveren, 5 December: 17.6 µg/m³, 2.0× usual Kortrijk Kortrijk, 27 November: 6.7 µg/m³, 0.8× usual Kortrijk, 28 November: 9.6 µg/m³, 1.1× usual Kortrijk, 29 November: 13.5 µg/m³, 1.6× usual Kortrijk, 30 November: 27.7 µg/m³, 3.3× usual Kortrijk, 1 December: 28.2 µg/m³, 3.4× usual Kortrijk, 2 December: 25.6 µg/m³, 3.0× usual Kortrijk, 3 December: 20.1 µg/m³, 2.4× usual Kortrijk, 4 December: 9.0 µg/m³, 1.1× usual Kortrijk, 5 December: 14.7 µg/m³, 1.7× usual Roubaix Roubaix, 27 November: 7.6 µg/m³, 0.9× usual Roubaix, 28 November: 9.5 µg/m³, 1.1× usual Roubaix, 29 November: 17.2 µg/m³, 2.0× usual Roubaix, 30 November: 27.6 µg/m³, 3.2× usual Roubaix, 1 December: 26.3 µg/m³, 3.0× usual Roubaix, 2 December: 28.9 µg/m³, 3.3× usual Roubaix, 3 December: 20.6 µg/m³, 2.4× usual Roubaix, 4 December: no reading Roubaix, 5 December: no reading Waregem Waregem, 27 November: 8.6 µg/m³, 0.9× usual Waregem, 28 November: 10.2 µg/m³, 1.1× usual Waregem, 29 November: 15.5 µg/m³, 1.6× usual Waregem, 30 November: 27.6 µg/m³, 2.9× usual Waregem, 1 December: 28.7 µg/m³, 3.0× usual Waregem, 2 December: 26.8 µg/m³, 2.8× usual Waregem, 3 December: 23.3 µg/m³, 2.4× usual Waregem, 4 December: 10.7 µg/m³, 1.1× usual Waregem, 5 December: 18.7 µg/m³, 1.9× usual Lille Lille, 27 November: 8.1 µg/m³, 1.0× usual Lille, 28 November: 9.3 µg/m³, 1.2× usual Lille, 29 November: 11.2 µg/m³, 1.4× usual Lille, 30 November: 26.9 µg/m³, 3.4× usual Lille, 1 December: 24.6 µg/m³, 3.2× usual Lille, 2 December: 24.5 µg/m³, 3.1× usual Lille, 3 December: 16.8 µg/m³, 2.2× usual Lille, 4 December: no reading Lille, 5 December: no reading Roeselare Roeselare, 27 November: 6.4 µg/m³, 0.7× usual Roeselare, 28 November: 7.6 µg/m³, 0.9× usual Roeselare, 29 November: 14.5 µg/m³, 1.6× usual Roeselare, 30 November: 26.4 µg/m³, 3.0× usual Roeselare, 1 December: 31.5 µg/m³, 3.6× usual Roeselare, 2 December: 24.1 µg/m³, 2.7× usual Roeselare, 3 December: 21.5 µg/m³, 2.4× usual Roeselare, 4 December: 10.5 µg/m³, 1.2× usual Roeselare, 5 December: 15.3 µg/m³, 1.7× usual Zwijndrecht Zwijndrecht, 27 November: 6.7 µg/m³, 0.9× usual Zwijndrecht, 28 November: 7.9 µg/m³, 1.0× usual Zwijndrecht, 29 November: 7.3 µg/m³, 0.9× usual Zwijndrecht, 30 November: 25.9 µg/m³, 3.4× usual Zwijndrecht, 1 December: 21.4 µg/m³, 2.8× usual Zwijndrecht, 2 December: 24.1 µg/m³, 3.1× usual Zwijndrecht, 3 December: 17.2 µg/m³, 2.2× usual Zwijndrecht, 4 December: 9.0 µg/m³, 1.2× usual Zwijndrecht, 5 December: 16.7 µg/m³, 2.2× usual Stabroek Stabroek, 27 November: 6.8 µg/m³, 0.8× usual Stabroek, 28 November: 7.6 µg/m³, 0.9× usual Stabroek, 29 November: 6.4 µg/m³, 0.8× usual Stabroek, 30 November: 25.7 µg/m³, 3.1× usual Stabroek, 1 December: 20.7 µg/m³, 2.5× usual Stabroek, 2 December: 24.5 µg/m³, 2.9× usual Stabroek, 3 December: 17.4 µg/m³, 2.1× usual Stabroek, 4 December: 12.7 µg/m³, 1.5× usual Stabroek, 5 December: 16.7 µg/m³, 2.0× usual Dieppe Dieppe, 27 November: 7.4 µg/m³, 0.9× usual Dieppe, 28 November: 9.2 µg/m³, 1.1× usual Dieppe, 29 November: 11.6 µg/m³, 1.4× usual Dieppe, 30 November: 16.8 µg/m³, 2.0× usual Dieppe, 1 December: 28.0 µg/m³, 3.3× usual Dieppe, 2 December: 27.2 µg/m³, 3.2× usual Dieppe, 3 December: 15.1 µg/m³, 1.8× usual Dieppe, 4 December: 9.4 µg/m³, 1.1× usual Dieppe, 5 December: 7.1 µg/m³, 0.8× usual Cork Cork, 27 November: 6.2 µg/m³, 0.9× usual Cork, 28 November: 13.2 µg/m³, 1.9× usual Cork, 29 November: 13.0 µg/m³, 1.8× usual Cork, 30 November: 8.1 µg/m³, 1.1× usual Cork, 1 December: 26.8 µg/m³, 3.8× usual Cork, 2 December: 53.3 µg/m³, 7.5× usual Cork, 3 December: 31.9 µg/m³, 4.5× usual Cork, 4 December: 6.8 µg/m³, 1.0× usual Cork, 5 December: 17.4 µg/m³, 2.5× usual Amiens Amiens, 27 November: 4.8 µg/m³, 0.6× usual Amiens, 28 November: 10.9 µg/m³, 1.4× usual Amiens, 29 November: 11.5 µg/m³, 1.5× usual Amiens, 30 November: 21.1 µg/m³, 2.8× usual Amiens, 1 December: 26.5 µg/m³, 3.5× usual Amiens, 2 December: 30.2 µg/m³, 4.0× usual Amiens, 3 December: 19.0 µg/m³, 2.5× usual Amiens, 4 December: 5.4 µg/m³, 0.7× usual Amiens, 5 December: 6.3 µg/m³, 0.8× usual Maldegem Maldegem, 27 November: 4.4 µg/m³, 0.5× usual Maldegem, 28 November: 0.0 µg/m³, 0.0× usual Maldegem, 29 November: 0.0 µg/m³, 0.0× usual Maldegem, 30 November: 11.3 µg/m³, 1.3× usual Maldegem, 1 December: 26.3 µg/m³, 3.1× usual Maldegem, 2 December: 20.0 µg/m³, 2.4× usual Maldegem, 3 December: 19.1 µg/m³, 2.2× usual Maldegem, 4 December: 9.9 µg/m³, 1.2× usual Maldegem, 5 December: 13.2 µg/m³, 1.6× usual Lochristi Lochristi, 27 November: 7.5 µg/m³, 0.8× usual Lochristi, 28 November: 6.0 µg/m³, 0.7× usual Lochristi, 29 November: 9.2 µg/m³, 1.0× usual Lochristi, 30 November: 24.9 µg/m³, 2.7× usual Lochristi, 1 December: 26.3 µg/m³, 2.9× usual Lochristi, 2 December: 22.1 µg/m³, 2.4× usual Lochristi, 3 December: 17.6 µg/m³, 1.9× usual Lochristi, 4 December: 8.9 µg/m³, 1.0× usual Lochristi, 5 December: 18.6 µg/m³, 2.0× usual Dún Laoghaire Dún Laoghaire, 27 November: 5.5 µg/m³, 0.9× usual Dún Laoghaire, 28 November: 13.0 µg/m³, 2.1× usual Dún Laoghaire, 29 November: 10.8 µg/m³, 1.8× usual Dún Laoghaire, 30 November: 6.6 µg/m³, 1.1× usual Dún Laoghaire, 1 December: 25.4 µg/m³, 4.2× usual Dún Laoghaire, 2 December: 26.4 µg/m³, 4.3× usual Dún Laoghaire, 3 December: 18.7 µg/m³, 3.1× usual Dún Laoghaire, 4 December: 7.5 µg/m³, 1.2× usual Dún Laoghaire, 5 December: 22.9 µg/m³, 3.8× usual Lormont Lormont, 27 November: 16.4 µg/m³, 2.0× usual Lormont, 28 November: 9.0 µg/m³, 1.1× usual Lormont, 29 November: 18.8 µg/m³, 2.2× usual Lormont, 30 November: 6.2 µg/m³, 0.7× usual Lormont, 1 December: 8.7 µg/m³, 1.0× usual Lormont, 2 December: 32.6 µg/m³, 3.9× usual Lormont, 3 December: 18.3 µg/m³, 2.2× usual Lormont, 4 December: 5.9 µg/m³, 0.7× usual Lormont, 5 December: 12.3 µg/m³, 1.5× usual Coulommiers Coulommiers, 27 November: 5.8 µg/m³, 0.6× usual Coulommiers, 28 November: 15.5 µg/m³, 1.7× usual Coulommiers, 29 November: 19.3 µg/m³, 2.1× usual Coulommiers, 30 November: 19.4 µg/m³, 2.2× usual Coulommiers, 1 December: 20.4 µg/m³, 2.3× usual Coulommiers, 2 December: 32.0 µg/m³, 3.6× usual Coulommiers, 3 December: 21.2 µg/m³, 2.4× usual Coulommiers, 4 December: 4.6 µg/m³, 0.5× usual Coulommiers, 5 December: 5.2 µg/m³, 0.6× usual Rouen Rouen, 27 November: 5.3 µg/m³, 0.6× usual Rouen, 28 November: 10.7 µg/m³, 1.3× usual Rouen, 29 November: 16.3 µg/m³, 1.9× usual Rouen, 30 November: 15.9 µg/m³, 1.9× usual Rouen, 1 December: 23.6 µg/m³, 2.8× usual Rouen, 2 December: 30.9 µg/m³, 3.7× usual Rouen, 3 December: 17.5 µg/m³, 2.1× usual Rouen, 4 December: 5.8 µg/m³, 0.7× usual Rouen, 5 December: 6.1 µg/m³, 0.7× usual Warrington Warrington, 27 November: 13.8 µg/m³, 2.5× usual Warrington, 28 November: 5.9 µg/m³, 1.1× usual Warrington, 29 November: 13.9 µg/m³, 2.5× usual Warrington, 30 November: 17.9 µg/m³, 3.2× usual Warrington, 1 December: 17.0 µg/m³, 3.0× usual Warrington, 2 December: 30.1 µg/m³, 5.4× usual Warrington, 3 December: no reading Warrington, 4 December: 8.5 µg/m³, 1.5× usual Warrington, 5 December: 6.6 µg/m³, 1.2× usual Joué-lès-Tours Joué-lès-Tours, 27 November: 7.9 µg/m³, 1.2× usual Joué-lès-Tours, 28 November: 10.1 µg/m³, 1.5× usual Joué-lès-Tours, 29 November: 15.9 µg/m³, 2.3× usual Joué-lès-Tours, 30 November: 16.4 µg/m³, 2.4× usual Joué-lès-Tours, 1 December: 18.1 µg/m³, 2.7× usual Joué-lès-Tours, 2 December: 30.0 µg/m³, 4.4× usual Joué-lès-Tours, 3 December: 15.3 µg/m³, 2.3× usual Joué-lès-Tours, 4 December: 3.7 µg/m³, 0.5× usual Joué-lès-Tours, 5 December: 5.5 µg/m³, 0.8× usual Wigan Wigan, 27 November: 11.7 µg/m³, 1.7× usual Wigan, 28 November: 6.2 µg/m³, 0.9× usual Wigan, 29 November: 16.5 µg/m³, 2.5× usual Wigan, 30 November: 15.0 µg/m³, 2.2× usual Wigan, 1 December: 13.3 µg/m³, 2.0× usual Wigan, 2 December: 29.4 µg/m³, 4.4× usual Wigan, 3 December: no reading Wigan, 4 December: 6.4 µg/m³, 1.0× usual Wigan, 5 December: 7.9 µg/m³, 1.2× usual Stoke-on-Trent Stoke-on-Trent, 27 November: 11.8 µg/m³, 2.0× usual Stoke-on-Trent, 28 November: 7.3 µg/m³, 1.2× usual Stoke-on-Trent, 29 November: 12.6 µg/m³, 2.1× usual Stoke-on-Trent, 30 November: 13.7 µg/m³, 2.3× usual Stoke-on-Trent, 1 December: 11.7 µg/m³, 2.0× usual Stoke-on-Trent, 2 December: 29.3 µg/m³, 5.0× usual Stoke-on-Trent, 3 December: no reading Stoke-on-Trent, 4 December: 6.5 µg/m³, 1.1× usual Stoke-on-Trent, 5 December: 6.9 µg/m³, 1.2× usual Poitiers Poitiers, 27 November: 9.5 µg/m³, 1.3× usual Poitiers, 28 November: 10.3 µg/m³, 1.4× usual Poitiers, 29 November: 14.9 µg/m³, 2.1× usual Poitiers, 30 November: 10.1 µg/m³, 1.4× usual Poitiers, 1 December: 12.4 µg/m³, 1.7× usual Poitiers, 2 December: 29.1 µg/m³, 4.0× usual Poitiers, 3 December: 14.0 µg/m³, 1.9× usual Poitiers, 4 December: 4.3 µg/m³, 0.6× usual Poitiers, 5 December: 6.4 µg/m³, 0.9× usual La Roche-sur-Yon La Roche-sur-Yon, 27 November: 8.0 µg/m³, 1.0× usual La Roche-sur-Yon, 28 November: 16.1 µg/m³, 2.1× usual La Roche-sur-Yon, 29 November: 17.8 µg/m³, 2.3× usual La Roche-sur-Yon, 30 November: 15.5 µg/m³, 2.0× usual La Roche-sur-Yon, 1 December: 12.7 µg/m³, 1.6× usual La Roche-sur-Yon, 2 December: 29.0 µg/m³, 3.7× usual La Roche-sur-Yon, 3 December: 14.8 µg/m³, 1.9× usual La Roche-sur-Yon, 4 December: 7.0 µg/m³, 0.9× usual La Roche-sur-Yon, 5 December: 10.0 µg/m³, 1.3× usual Valenciennes Valenciennes, 27 November: 8.5 µg/m³, 1.0× usual Valenciennes, 28 November: 11.1 µg/m³, 1.3× usual Valenciennes, 29 November: 13.5 µg/m³, 1.6× usual Valenciennes, 30 November: 21.6 µg/m³, 2.6× usual Valenciennes, 1 December: 24.4 µg/m³, 2.9× usual Valenciennes, 2 December: 29.0 µg/m³, 3.5× usual Valenciennes, 3 December: 20.2 µg/m³, 2.4× usual Valenciennes, 4 December: 6.3 µg/m³, 0.8× usual Valenciennes, 5 December: 12.8 µg/m³, 1.5× usual Tours Tours, 27 November: 8.6 µg/m³, 1.3× usual Tours, 28 November: 8.8 µg/m³, 1.3× usual Tours, 29 November: 14.7 µg/m³, 2.2× usual Tours, 30 November: 13.5 µg/m³, 2.0× usual Tours, 1 December: 14.5 µg/m³, 2.2× usual Tours, 2 December: 28.7 µg/m³, 4.3× usual Tours, 3 December: 16.7 µg/m³, 2.5× usual Tours, 4 December: 5.2 µg/m³, 0.8× usual Tours, 5 December: 6.9 µg/m³, 1.0× usual Louviers Louviers, 27 November: 4.7 µg/m³, 0.7× usual Louviers, 28 November: 8.4 µg/m³, 1.2× usual Louviers, 29 November: 14.7 µg/m³, 2.1× usual Louviers, 30 November: 15.1 µg/m³, 2.2× usual Louviers, 1 December: 24.8 µg/m³, 3.6× usual Louviers, 2 December: 28.7 µg/m³, 4.2× usual Louviers, 3 December: 15.9 µg/m³, 2.3× usual Louviers, 4 December: 3.6 µg/m³, 0.5× usual Louviers, 5 December: 3.3 µg/m³, 0.5× usual Bristol Bristol, 27 November: 6.9 µg/m³, 1.1× usual Bristol, 28 November: 5.7 µg/m³, 0.9× usual Bristol, 29 November: 16.8 µg/m³, 2.7× usual Bristol, 30 November: 16.9 µg/m³, 2.7× usual Bristol, 1 December: 15.6 µg/m³, 2.5× usual Bristol, 2 December: 28.5 µg/m³, 4.5× usual Bristol, 3 December: no reading Bristol, 4 December: 6.1 µg/m³, 1.0× usual Bristol, 5 December: 6.7 µg/m³, 1.1× usual Béthune Béthune, 27 November: 3.8 µg/m³, 0.5× usual Béthune, 28 November: 7.5 µg/m³, 1.0× usual Béthune, 29 November: 12.7 µg/m³, 1.8× usual Béthune, 30 November: 24.6 µg/m³, 3.4× usual Béthune, 1 December: 24.2 µg/m³, 3.4× usual Béthune, 2 December: 28.4 µg/m³, 3.9× usual Béthune, 3 December: 14.4 µg/m³, 2.0× usual Béthune, 4 December: 5.7 µg/m³, 0.8× usual Béthune, 5 December: 8.8 µg/m³, 1.2× usual Melun Melun, 27 November: 7.9 µg/m³, 1.0× usual Melun, 28 November: 14.2 µg/m³, 1.8× usual Melun, 29 November: 20.9 µg/m³, 2.6× usual Melun, 30 November: 16.8 µg/m³, 2.1× usual Melun, 1 December: 20.3 µg/m³, 2.5× usual Melun, 2 December: 27.0 µg/m³, 3.3× usual Melun, 3 December: 21.2 µg/m³, 2.6× usual Melun, 4 December: 6.4 µg/m³, 0.8× usual Melun, 5 December: 7.7 µg/m³, 1.0× usual Évreux Évreux, 27 November: 4.3 µg/m³, 0.6× usual Évreux, 28 November: 8.1 µg/m³, 1.2× usual Évreux, 29 November: 12.7 µg/m³, 1.9× usual Évreux, 30 November: 14.4 µg/m³, 2.1× usual Évreux, 1 December: 21.7 µg/m³, 3.2× usual Évreux, 2 December: 26.5 µg/m³, 4.0× usual Évreux, 3 December: 13.4 µg/m³, 2.0× usual Évreux, 4 December: 3.7 µg/m³, 0.6× usual Évreux, 5 December: 3.0 µg/m³, 0.4× usual Denain Denain, 27 November: 6.7 µg/m³, 0.8× usual Denain, 28 November: 9.5 µg/m³, 1.2× usual Denain, 29 November: 12.1 µg/m³, 1.5× usual Denain, 30 November: 20.8 µg/m³, 2.6× usual Denain, 1 December: 24.0 µg/m³, 3.0× usual Denain, 2 December: 26.3 µg/m³, 3.3× usual Denain, 3 December: 18.6 µg/m³, 2.3× usual Denain, 4 December: 6.2 µg/m³, 0.8× usual Denain, 5 December: 11.6 µg/m³, 1.5× usual Antwerp Antwerp, 27 November: 6.5 µg/m³, 0.8× usual Antwerp, 28 November: 7.9 µg/m³, 0.9× usual Antwerp, 29 November: 9.8 µg/m³, 1.2× usual Antwerp, 30 November: 24.5 µg/m³, 2.9× usual Antwerp, 1 December: 23.2 µg/m³, 2.8× usual Antwerp, 2 December: 25.7 µg/m³, 3.1× usual Antwerp, 3 December: 19.9 µg/m³, 2.4× usual Antwerp, 4 December: 10.6 µg/m³, 1.3× usual Antwerp, 5 December: 18.5 µg/m³, 2.2× usual Blois Blois, 27 November: 5.4 µg/m³, 0.9× usual Blois, 28 November: 5.6 µg/m³, 0.9× usual Blois, 29 November: 12.1 µg/m³, 2.0× usual Blois, 30 November: 13.1 µg/m³, 2.1× usual Blois, 1 December: 18.0 µg/m³, 3.0× usual Blois, 2 December: 25.5 µg/m³, 4.2× usual Blois, 3 December: 14.1 µg/m³, 2.3× usual Blois, 4 December: 3.2 µg/m³, 0.5× usual Blois, 5 December: 4.2 µg/m³, 0.7× usual Angers Angers, 27 November: 5.9 µg/m³, 0.8× usual Angers, 28 November: 9.5 µg/m³, 1.2× usual Angers, 29 November: 16.9 µg/m³, 2.2× usual Angers, 30 November: 15.4 µg/m³, 2.0× usual Angers, 1 December: 21.2 µg/m³, 2.7× usual Angers, 2 December: 25.5 µg/m³, 3.3× usual Angers, 3 December: 14.6 µg/m³, 1.9× usual Angers, 4 December: 4.2 µg/m³, 0.5× usual Angers, 5 December: 5.4 µg/m³, 0.7× usual Lisieux Lisieux, 27 November: 3.6 µg/m³, 0.5× usual Lisieux, 28 November: 7.5 µg/m³, 1.1× usual Lisieux, 29 November: 10.7 µg/m³, 1.6× usual Lisieux, 30 November: 13.6 µg/m³, 2.0× usual Lisieux, 1 December: 14.1 µg/m³, 2.0× usual Lisieux, 2 December: 25.3 µg/m³, 3.7× usual Lisieux, 3 December: 12.4 µg/m³, 1.8× usual Lisieux, 4 December: 2.8 µg/m³, 0.4× usual Lisieux, 5 December: 3.6 µg/m³, 0.5× usual 27 Nov 28 29 30 1 Dec 2 3 4 5 Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Cork Munster, Ireland 1 2 December 7.1 7.5× Warrington England, United Kingdom 1 2 December 5.6 5.4× Stoke-on-Trent England, United Kingdom 1 2 December 5.9 5.0× Bristol England, United Kingdom 1 2 December 6.3 4.5× Joué-lès-Tours Centre-Val de Loire, France 1 2 December 6.8 4.4× Wigan England, United Kingdom 1 2 December 6.7 4.4× Dún Laoghaire Leinster, Ireland 1 2 December 6.1 4.3× Tours Centre-Val de Loire, France 1 2 December 6.7 4.3× Blois Centre-Val de Loire, France 1 2 December 6.1 4.2× Louviers Normandy, France 1 2 December 6.9 4.2× Poitiers New Aquitaine, France 1 2 December 7.2 4.0× Dunkirk Hauts-de-France, France 3 1 December 8.7 4.0× Amiens Hauts-de-France, France 2 2 December 7.6 4.0× Évreux Normandy, France 1 2 December 6.7 4.0× Béthune Hauts-de-France, France 1 2 December 7.2 3.9× Lormont New Aquitaine, France 1 2 December 8.4 3.9× La Roche-sur-Yon Pays de la Loire, France 1 2 December 7.8 3.7× Douai Hauts-de-France, France 3 30 November 8.4 3.7× Rouen Normandy, France 1 2 December 8.4 3.7× Evergem Flanders, Belgium 3 30 November 9.0 3.7× Lisieux Normandy, France 1 2 December 6.9 3.7× Roeselare Flanders, Belgium 2 1 December 8.8 3.6× Coulommiers Île-de-France, France 1 2 December 9.0 3.6× Valenciennes Hauts-de-France, France 1 2 December 8.4 3.5× Lille Hauts-de-France, France 1 30 November 7.8 3.4× Nantes Pays de la Loire, France 1 2 December 8.1 3.4× Zwijndrecht Flanders, Belgium 1 30 November 7.7 3.4× Kortrijk Flanders, Belgium 3 1 December 8.4 3.4× Melun Île-de-France, France 1 2 December 8.1 3.3× Dieppe Normandy, France 2 1 December 8.4 3.3× Roubaix Hauts-de-France, France 3 2 December 8.7 3.3× Menen Flanders, Belgium 3 1 December 8.8 3.3× Sainte-Geneviève-des-Bois Île-de-France, France 2 2 December 12.3 3.3× Denain Hauts-de-France, France 1 2 December 8.0 3.3× Angers Pays de la Loire, France 1 2 December 7.8 3.3× Beveren Flanders, Belgium 1 30 November 8.7 3.2× Bordeaux New Aquitaine, France 1 2 December 8.0 3.2× Maldegem Flanders, Belgium 1 1 December 8.5 3.1× Stabroek Flanders, Belgium 1 30 November 8.4 3.1× Antwerp Flanders, Belgium 1 2 December 8.4 3.1× Waregem Flanders, Belgium 3 1 December 9.6 3.0× Lochristi Flanders, Belgium 1 1 December 9.2 2.9× Izegem Flanders, Belgium 3 1 December 10.6 2.8×
Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.
Against other episodes in France and Belgium
Number 6 of 17 episodes in France and Belgium since our records began, by cities reached.
Central Europe, February and March 2023 274 Western Europe, March 2023 119 Southern Europe, December 2023 97 North-eastern Spain and France, February 2023 72 France, The Netherlands and United Kingdom, January 2023 66 France, Belgium and United Kingdom, November and December 2023 43 United Kingdom and Belgium, September 2023 42 France and Belgium, April 2023 36 Belgium and Germany, May 2023 26 Belgium and France, August 2023 15 United Kingdom, Belgium and France, June 2023 10 Flanders and Wallonia, Belgium, May 2023 10 Bars: cities reached; colour: the level of the episode's highest daily reading. All 17 .
Use this page SmogRank, France, Belgium and United Kingdom, November and December 2023: 43 cities with PM2.5 at twice their usual or more, 30 November to 2 December 2023, smogrank.com/episodes/2023-11-france-belgium-and-united-kingdom (accessed 2 October 2026).
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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms .
An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes . Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.
