SmogRank / Episodes / France
France, Belgium and 2 more countries, 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 Stabroek Maldegem Bordeaux Beveren Angers Denain Melun Dieppe Roubaix Menen Sainte-Geneviève-des-Bois Zwijndrecht Lille Nantes Kortrijk Valenciennes Roeselare Coulommiers Lisieux La Roche-sur-Yon Rouen Douai Evergem Béthune Lormont Évreux Poitiers Amiens Dunkirk Blois Louviers Dún Laoghaire Tours Wigan Joué-lès-Tours 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
Evergem Evergem, 27 November: 7.4 µg/m³ Evergem, 28 November: 9.5 µg/m³ Evergem, 29 November: 10.2 µg/m³ Evergem, 30 November: 33.0 µg/m³, 3.7× its usual 9.0 Evergem, 1 December: 29.6 µg/m³, 3.3× its usual 8.9 Evergem, 2 December: 25.9 µg/m³, 2.9× its usual 8.9 Evergem, 3 December: 20.0 µg/m³ Evergem, 4 December: 10.6 µg/m³ Evergem, 5 December: 19.3 µg/m³ Dunkirk Dunkirk, 27 November: 5.0 µg/m³ Dunkirk, 28 November: 5.7 µg/m³ Dunkirk, 29 November: 16.1 µg/m³ Dunkirk, 30 November: 31.4 µg/m³, 3.6× its usual 8.7 Dunkirk, 1 December: 34.6 µg/m³, 4.0× its usual 8.7 Dunkirk, 2 December: 25.2 µg/m³, 2.9× its usual 8.7 Dunkirk, 3 December: 23.2 µg/m³ Dunkirk, 4 December: 12.2 µg/m³ Dunkirk, 5 December: 8.4 µg/m³ Douai Douai, 27 November: 6.3 µg/m³ Douai, 28 November: 10.0 µg/m³ Douai, 29 November: 13.1 µg/m³ Douai, 30 November: 31.0 µg/m³, 3.7× its usual 8.4 Douai, 1 December: 28.2 µg/m³, 3.4× its usual 8.4 Douai, 2 December: 27.3 µg/m³, 3.3× its usual 8.4 Douai, 3 December: 19.0 µg/m³ Douai, 4 December: 7.3 µg/m³ Douai, 5 December: 12.4 µg/m³ Menen Menen, 27 November: 7.2 µg/m³ Menen, 28 November: 11.7 µg/m³ Menen, 29 November: 17.1 µg/m³ Menen, 30 November: 28.8 µg/m³, 3.1× its usual 9.2 Menen, 1 December: 29.1 µg/m³, 3.3× its usual 8.8 Menen, 2 December: 26.1 µg/m³, 3.0× its usual 8.8 Menen, 3 December: 20.6 µg/m³ Menen, 4 December: 9.1 µg/m³ Menen, 5 December: 16.4 µg/m³ Izegem Izegem, 27 November: 9.5 µg/m³ Izegem, 28 November: 10.8 µg/m³ Izegem, 29 November: 15.2 µg/m³ Izegem, 30 November: 28.7 µg/m³, 2.6× its usual 10.9 Izegem, 1 December: 30.0 µg/m³, 2.8× its usual 10.6 Izegem, 2 December: 28.1 µg/m³, 2.7× its usual 10.6 Izegem, 3 December: 22.3 µg/m³ Izegem, 4 December: 10.4 µg/m³ Izegem, 5 December: 18.8 µg/m³ Beveren Beveren, 27 November: 7.0 µg/m³ Beveren, 28 November: 8.4 µg/m³ Beveren, 29 November: 7.3 µg/m³ Beveren, 30 November: 28.1 µg/m³, 3.2× its usual 8.7 Beveren, 1 December: 22.8 µg/m³ Beveren, 2 December: 24.9 µg/m³ Beveren, 3 December: 17.9 µg/m³ Beveren, 4 December: 9.4 µg/m³ Beveren, 5 December: 17.6 µg/m³ Kortrijk Kortrijk, 27 November: 6.7 µg/m³ Kortrijk, 28 November: 9.6 µg/m³ Kortrijk, 29 November: 13.5 µg/m³ Kortrijk, 30 November: 27.7 µg/m³, 3.3× its usual 8.5 Kortrijk, 1 December: 28.2 µg/m³, 3.4× its usual 8.4 Kortrijk, 2 December: 25.6 µg/m³, 3.0× its usual 8.4 Kortrijk, 3 December: 20.1 µg/m³ Kortrijk, 4 December: 9.0 µg/m³ Kortrijk, 5 December: 14.7 µg/m³ Roubaix Roubaix, 27 November: 7.6 µg/m³ Roubaix, 28 November: 9.5 µg/m³ Roubaix, 29 November: 17.2 µg/m³ Roubaix, 30 November: 27.6 µg/m³, 3.1× its usual 8.9 Roubaix, 1 December: 26.3 µg/m³, 3.1× its usual 8.6 Roubaix, 2 December: 28.9 µg/m³, 3.3× its usual 8.7 Roubaix, 3 December: 20.6 µg/m³ Roubaix, 4 December: no reading Roubaix, 5 December: no reading Waregem Waregem, 27 November: 8.6 µg/m³ Waregem, 28 November: 10.2 µg/m³ Waregem, 29 November: 15.5 µg/m³ Waregem, 30 November: 27.6 µg/m³, 2.8× its usual 9.8 Waregem, 1 December: 28.7 µg/m³, 3.0× its usual 9.6 Waregem, 2 December: 26.8 µg/m³, 2.7× its usual 9.8 Waregem, 3 December: 23.3 µg/m³ Waregem, 4 December: 10.7 µg/m³ Waregem, 5 December: 18.7 µg/m³ Lille Lille, 27 November: 8.1 µg/m³ Lille, 28 November: 9.3 µg/m³ Lille, 29 November: 11.2 µg/m³ Lille, 30 November: 26.9 µg/m³, 3.4× its usual 7.8 Lille, 1 December: 24.6 µg/m³ Lille, 2 December: 24.5 µg/m³ Lille, 3 December: 16.8 µg/m³ Lille, 4 December: no reading Lille, 5 December: no reading Roeselare Roeselare, 27 November: 6.4 µg/m³ Roeselare, 28 November: 7.6 µg/m³ Roeselare, 29 November: 14.5 µg/m³ Roeselare, 30 November: 26.4 µg/m³, 3.0× its usual 8.9 Roeselare, 1 December: 31.5 µg/m³, 3.6× its usual 8.8 Roeselare, 2 December: 24.1 µg/m³ Roeselare, 3 December: 21.5 µg/m³ Roeselare, 4 December: 10.5 µg/m³ Roeselare, 5 December: 15.3 µg/m³ Zwijndrecht Zwijndrecht, 27 November: 6.7 µg/m³ Zwijndrecht, 28 November: 7.9 µg/m³ Zwijndrecht, 29 November: 7.3 µg/m³ Zwijndrecht, 30 November: 25.9 µg/m³, 3.4× its usual 7.7 Zwijndrecht, 1 December: 21.4 µg/m³ Zwijndrecht, 2 December: 24.1 µg/m³ Zwijndrecht, 3 December: 17.2 µg/m³ Zwijndrecht, 4 December: 9.0 µg/m³ Zwijndrecht, 5 December: 16.7 µg/m³ Stabroek Stabroek, 27 November: 6.8 µg/m³ Stabroek, 28 November: 7.6 µg/m³ Stabroek, 29 November: 6.4 µg/m³ Stabroek, 30 November: 25.7 µg/m³, 3.1× its usual 8.4 Stabroek, 1 December: 20.7 µg/m³ Stabroek, 2 December: 24.5 µg/m³ Stabroek, 3 December: 17.4 µg/m³ Stabroek, 4 December: 12.7 µg/m³ Stabroek, 5 December: 16.7 µg/m³ Dieppe Dieppe, 27 November: 7.4 µg/m³ Dieppe, 28 November: 9.2 µg/m³ Dieppe, 29 November: 11.6 µg/m³ Dieppe, 30 November: 16.8 µg/m³ Dieppe, 1 December: 28.0 µg/m³, 3.3× its usual 8.4 Dieppe, 2 December: 27.2 µg/m³, 3.2× its usual 8.4 Dieppe, 3 December: 15.1 µg/m³ Dieppe, 4 December: 9.4 µg/m³ Dieppe, 5 December: 7.1 µg/m³ Amiens Amiens, 27 November: 4.8 µg/m³ Amiens, 28 November: 10.9 µg/m³ Amiens, 29 November: 11.5 µg/m³ Amiens, 30 November: 21.1 µg/m³ Amiens, 1 December: 26.5 µg/m³, 3.5× its usual 7.6 Amiens, 2 December: 30.2 µg/m³, 4.0× its usual 7.6 Amiens, 3 December: 19.0 µg/m³ Amiens, 4 December: 5.4 µg/m³ Amiens, 5 December: 6.3 µg/m³ Maldegem Maldegem, 27 November: 4.4 µg/m³ Maldegem, 28 November: no reading Maldegem, 29 November: no reading Maldegem, 30 November: 11.3 µg/m³ Maldegem, 1 December: 26.3 µg/m³, 3.1× its usual 8.5 Maldegem, 2 December: 20.0 µg/m³ Maldegem, 3 December: 19.1 µg/m³ Maldegem, 4 December: 9.9 µg/m³ Maldegem, 5 December: 13.2 µg/m³ Lochristi Lochristi, 27 November: 7.5 µg/m³ Lochristi, 28 November: 6.0 µg/m³ Lochristi, 29 November: 9.2 µg/m³ Lochristi, 30 November: 24.9 µg/m³ Lochristi, 1 December: 26.3 µg/m³, 2.9× its usual 9.2 Lochristi, 2 December: 22.1 µg/m³ Lochristi, 3 December: 17.6 µg/m³ Lochristi, 4 December: 8.9 µg/m³ Lochristi, 5 December: 18.6 µg/m³ Sainte-Geneviève-de… Sainte-Geneviève-des-Bois, 27 November: 10.6 µg/m³ Sainte-Geneviève-des-Bois, 28 November: 23.4 µg/m³ Sainte-Geneviève-des-Bois, 29 November: 35.8 µg/m³ Sainte-Geneviève-des-Bois, 30 November: 24.9 µg/m³ Sainte-Geneviève-des-Bois, 1 December: 25.9 µg/m³, 2.1× its usual 12.3 Sainte-Geneviève-des-Bois, 2 December: 40.6 µg/m³, 3.3× its usual 12.3 Sainte-Geneviève-des-Bois, 3 December: 30.4 µg/m³ Sainte-Geneviève-des-Bois, 4 December: 9.3 µg/m³ Sainte-Geneviève-des-Bois, 5 December: 9.0 µg/m³ Cork Cork, 27 November: 6.2 µg/m³ Cork, 28 November: 13.2 µg/m³ Cork, 29 November: 13.0 µg/m³ Cork, 30 November: 8.1 µg/m³ Cork, 1 December: 26.8 µg/m³ Cork, 2 December: 53.3 µg/m³, 7.5× its usual 7.1 Cork, 3 December: 31.9 µg/m³ Cork, 4 December: 6.8 µg/m³ Cork, 5 December: 17.4 µg/m³ Lormont Lormont, 27 November: 16.4 µg/m³ Lormont, 28 November: 9.0 µg/m³ Lormont, 29 November: 18.8 µg/m³ Lormont, 30 November: 6.2 µg/m³ Lormont, 1 December: 8.7 µg/m³ Lormont, 2 December: 32.6 µg/m³, 3.9× its usual 8.4 Lormont, 3 December: 18.3 µg/m³ Lormont, 4 December: 5.9 µg/m³ Lormont, 5 December: 12.3 µg/m³ Coulommiers Coulommiers, 27 November: 5.8 µg/m³ Coulommiers, 28 November: 15.5 µg/m³ Coulommiers, 29 November: 19.3 µg/m³ Coulommiers, 30 November: 19.4 µg/m³ Coulommiers, 1 December: 20.4 µg/m³ Coulommiers, 2 December: 32.0 µg/m³, 3.6× its usual 9.0 Coulommiers, 3 December: 21.2 µg/m³ Coulommiers, 4 December: 4.6 µg/m³ Coulommiers, 5 December: 5.2 µg/m³ Rouen Rouen, 27 November: 5.3 µg/m³ Rouen, 28 November: 10.7 µg/m³ Rouen, 29 November: 16.3 µg/m³ Rouen, 30 November: 15.9 µg/m³ Rouen, 1 December: 23.6 µg/m³ Rouen, 2 December: 30.9 µg/m³, 3.7× its usual 8.4 Rouen, 3 December: 17.5 µg/m³ Rouen, 4 December: 5.8 µg/m³ Rouen, 5 December: 6.1 µg/m³ Warrington Warrington, 27 November: 13.8 µg/m³ Warrington, 28 November: 5.9 µg/m³ Warrington, 29 November: 13.9 µg/m³ Warrington, 30 November: 17.9 µg/m³ Warrington, 1 December: 17.0 µg/m³ Warrington, 2 December: 30.1 µg/m³, 5.3× its usual 5.7 Warrington, 3 December: no reading Warrington, 4 December: 8.5 µg/m³ Warrington, 5 December: 6.6 µg/m³ Joué-lès-Tours Joué-lès-Tours, 27 November: 7.9 µg/m³ Joué-lès-Tours, 28 November: 10.1 µg/m³ Joué-lès-Tours, 29 November: 15.9 µg/m³ Joué-lès-Tours, 30 November: 16.4 µg/m³ Joué-lès-Tours, 1 December: 18.1 µg/m³ Joué-lès-Tours, 2 December: 30.0 µg/m³, 4.4× its usual 6.8 Joué-lès-Tours, 3 December: 15.3 µg/m³ Joué-lès-Tours, 4 December: 3.7 µg/m³ Joué-lès-Tours, 5 December: 5.5 µg/m³ Wigan Wigan, 27 November: 11.7 µg/m³ Wigan, 28 November: 6.2 µg/m³ Wigan, 29 November: 16.5 µg/m³ Wigan, 30 November: 15.0 µg/m³ Wigan, 1 December: 13.3 µg/m³ Wigan, 2 December: 29.4 µg/m³, 4.4× its usual 6.7 Wigan, 3 December: no reading Wigan, 4 December: 6.4 µg/m³ Wigan, 5 December: 7.9 µg/m³ Stoke-on-Trent Stoke-on-Trent, 27 November: 11.8 µg/m³ Stoke-on-Trent, 28 November: 7.3 µg/m³ Stoke-on-Trent, 29 November: 12.6 µg/m³ Stoke-on-Trent, 30 November: 13.7 µg/m³ Stoke-on-Trent, 1 December: 11.7 µg/m³ Stoke-on-Trent, 2 December: 29.3 µg/m³, 5.0× its usual 5.9 Stoke-on-Trent, 3 December: no reading Stoke-on-Trent, 4 December: 6.5 µg/m³ Stoke-on-Trent, 5 December: 6.9 µg/m³ Poitiers Poitiers, 27 November: 9.5 µg/m³ Poitiers, 28 November: 10.3 µg/m³ Poitiers, 29 November: 14.9 µg/m³ Poitiers, 30 November: 10.1 µg/m³ Poitiers, 1 December: 12.4 µg/m³ Poitiers, 2 December: 29.1 µg/m³, 4.0× its usual 7.2 Poitiers, 3 December: 14.0 µg/m³ Poitiers, 4 December: 4.3 µg/m³ Poitiers, 5 December: 6.4 µg/m³ La Roche-sur-Yon La Roche-sur-Yon, 27 November: 8.0 µg/m³ La Roche-sur-Yon, 28 November: 16.1 µg/m³ La Roche-sur-Yon, 29 November: 17.8 µg/m³ La Roche-sur-Yon, 30 November: 15.5 µg/m³ La Roche-sur-Yon, 1 December: 12.7 µg/m³ La Roche-sur-Yon, 2 December: 29.0 µg/m³, 3.7× its usual 7.8 La Roche-sur-Yon, 3 December: 14.8 µg/m³ La Roche-sur-Yon, 4 December: 7.0 µg/m³ La Roche-sur-Yon, 5 December: 10.0 µg/m³ Valenciennes Valenciennes, 27 November: 8.5 µg/m³ Valenciennes, 28 November: 11.1 µg/m³ Valenciennes, 29 November: 13.5 µg/m³ Valenciennes, 30 November: 21.6 µg/m³ Valenciennes, 1 December: 24.4 µg/m³ Valenciennes, 2 December: 29.0 µg/m³, 3.5× its usual 8.4 Valenciennes, 3 December: 20.2 µg/m³ Valenciennes, 4 December: 6.3 µg/m³ Valenciennes, 5 December: 12.8 µg/m³ Tours Tours, 27 November: 8.6 µg/m³ Tours, 28 November: 8.8 µg/m³ Tours, 29 November: 14.7 µg/m³ Tours, 30 November: 13.5 µg/m³ Tours, 1 December: 14.5 µg/m³ Tours, 2 December: 28.7 µg/m³, 4.3× its usual 6.7 Tours, 3 December: 16.7 µg/m³ Tours, 4 December: 5.2 µg/m³ Tours, 5 December: 6.9 µg/m³ Louviers Louviers, 27 November: 4.7 µg/m³ Louviers, 28 November: 8.4 µg/m³ Louviers, 29 November: 14.7 µg/m³ Louviers, 30 November: 15.1 µg/m³ Louviers, 1 December: 24.8 µg/m³ Louviers, 2 December: 28.7 µg/m³, 4.2× its usual 6.9 Louviers, 3 December: 15.9 µg/m³ Louviers, 4 December: 3.6 µg/m³ Louviers, 5 December: 3.3 µg/m³ Bristol Bristol, 27 November: 6.9 µg/m³ Bristol, 28 November: 5.7 µg/m³ Bristol, 29 November: 16.8 µg/m³ Bristol, 30 November: 16.9 µg/m³ Bristol, 1 December: 15.6 µg/m³ Bristol, 2 December: 28.5 µg/m³, 4.6× its usual 6.2 Bristol, 3 December: no reading Bristol, 4 December: 6.1 µg/m³ Bristol, 5 December: 6.7 µg/m³ Béthune Béthune, 27 November: 3.8 µg/m³ Béthune, 28 November: 7.5 µg/m³ Béthune, 29 November: 12.7 µg/m³ Béthune, 30 November: 24.6 µg/m³ Béthune, 1 December: 24.2 µg/m³ Béthune, 2 December: 28.4 µg/m³, 3.9× its usual 7.2 Béthune, 3 December: 14.4 µg/m³ Béthune, 4 December: 5.7 µg/m³ Béthune, 5 December: 8.8 µg/m³ Nantes Nantes, 27 November: 5.1 µg/m³ Nantes, 28 November: 13.3 µg/m³ Nantes, 29 November: 25.4 µg/m³ Nantes, 30 November: 13.9 µg/m³ Nantes, 1 December: 18.5 µg/m³ Nantes, 2 December: 27.3 µg/m³, 3.4× its usual 8.1 Nantes, 3 December: 15.8 µg/m³ Nantes, 4 December: 5.8 µg/m³ Nantes, 5 December: 7.1 µg/m³ Melun Melun, 27 November: 7.9 µg/m³ Melun, 28 November: 14.2 µg/m³ Melun, 29 November: 20.9 µg/m³ Melun, 30 November: 16.8 µg/m³ Melun, 1 December: 20.3 µg/m³ Melun, 2 December: 27.0 µg/m³, 3.3× its usual 8.1 Melun, 3 December: 21.2 µg/m³ Melun, 4 December: 6.4 µg/m³ Melun, 5 December: 7.7 µg/m³ Évreux Évreux, 27 November: 4.3 µg/m³ Évreux, 28 November: 8.1 µg/m³ Évreux, 29 November: 12.7 µg/m³ Évreux, 30 November: 14.4 µg/m³ Évreux, 1 December: 21.7 µg/m³ Évreux, 2 December: 26.5 µg/m³, 4.0× its usual 6.7 Évreux, 3 December: 13.4 µg/m³ Évreux, 4 December: 3.7 µg/m³ Évreux, 5 December: 3.0 µg/m³ Dún Laoghaire Dún Laoghaire, 27 November: 5.5 µg/m³ Dún Laoghaire, 28 November: 13.0 µg/m³ Dún Laoghaire, 29 November: 10.8 µg/m³ Dún Laoghaire, 30 November: 6.6 µg/m³ Dún Laoghaire, 1 December: 25.4 µg/m³ Dún Laoghaire, 2 December: 26.4 µg/m³, 4.3× its usual 6.1 Dún Laoghaire, 3 December: 18.7 µg/m³ Dún Laoghaire, 4 December: 7.5 µg/m³ Dún Laoghaire, 5 December: 22.9 µg/m³ Denain Denain, 27 November: 6.7 µg/m³ Denain, 28 November: 9.5 µg/m³ Denain, 29 November: 12.1 µg/m³ Denain, 30 November: 20.8 µg/m³ Denain, 1 December: 24.0 µg/m³ Denain, 2 December: 26.3 µg/m³, 3.3× its usual 8.0 Denain, 3 December: 18.6 µg/m³ Denain, 4 December: 6.2 µg/m³ Denain, 5 December: 11.6 µg/m³ Antwerp Antwerp, 27 November: 6.5 µg/m³ Antwerp, 28 November: 7.9 µg/m³ Antwerp, 29 November: 9.8 µg/m³ Antwerp, 30 November: 24.5 µg/m³ Antwerp, 1 December: 23.2 µg/m³ Antwerp, 2 December: 25.7 µg/m³, 3.1× its usual 8.4 Antwerp, 3 December: 19.9 µg/m³ Antwerp, 4 December: 10.6 µg/m³ Antwerp, 5 December: 18.5 µg/m³ Blois Blois, 27 November: 5.4 µg/m³ Blois, 28 November: 5.6 µg/m³ Blois, 29 November: 12.1 µg/m³ Blois, 30 November: 13.1 µg/m³ Blois, 1 December: 18.0 µg/m³ Blois, 2 December: 25.5 µg/m³, 4.2× its usual 6.1 Blois, 3 December: 14.1 µg/m³ Blois, 4 December: 3.2 µg/m³ Blois, 5 December: 4.2 µg/m³ Angers Angers, 27 November: 5.9 µg/m³ Angers, 28 November: 9.5 µg/m³ Angers, 29 November: 16.9 µg/m³ Angers, 30 November: 15.4 µg/m³ Angers, 1 December: 21.2 µg/m³ Angers, 2 December: 25.5 µg/m³, 3.3× its usual 7.8 Angers, 3 December: 14.6 µg/m³ Angers, 4 December: 4.2 µg/m³ Angers, 5 December: 5.4 µg/m³ Lisieux Lisieux, 27 November: 3.6 µg/m³ Lisieux, 28 November: 7.5 µg/m³ Lisieux, 29 November: 10.7 µg/m³ Lisieux, 30 November: 13.6 µg/m³ Lisieux, 1 December: 14.1 µg/m³ Lisieux, 2 December: 25.3 µg/m³, 3.7× its usual 6.9 Lisieux, 3 December: 12.4 µg/m³ Lisieux, 4 December: 2.8 µg/m³ Lisieux, 5 December: 3.6 µg/m³ Bordeaux Bordeaux, 27 November: 15.7 µg/m³ Bordeaux, 28 November: 14.9 µg/m³ Bordeaux, 29 November: 25.1 µg/m³ Bordeaux, 30 November: 6.3 µg/m³ Bordeaux, 1 December: 7.1 µg/m³ Bordeaux, 2 December: 25.2 µg/m³, 3.2× its usual 8.0 Bordeaux, 3 December: 17.4 µg/m³ Bordeaux, 4 December: 5.6 µg/m³ Bordeaux, 5 December: 15.6 µg/m³ 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 5.7 5.3× Stoke-on-Trent England, United Kingdom 1 2 December 5.9 5.0× Bristol England, United Kingdom 1 2 December 6.2 4.6× 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× Tours Centre-Val de Loire, France 1 2 December 6.7 4.3× Dún Laoghaire Leinster, Ireland 1 2 December 6.1 4.3× Louviers Normandy, France 1 2 December 6.9 4.2× Blois Centre-Val de Loire, France 1 2 December 6.1 4.2× Dunkirk Hauts-de-France, France 3 1 December 8.7 4.0× Amiens Hauts-de-France, France 2 2 December 7.6 4.0× Poitiers New Aquitaine, France 1 2 December 7.2 4.0× Évreux Normandy, France 1 2 December 6.7 4.0× Lormont New Aquitaine, France 1 2 December 8.4 3.9× Béthune Hauts-de-France, France 1 2 December 7.2 3.9× Evergem Flanders, Belgium 3 30 November 9.0 3.7× Douai Hauts-de-France, France 3 30 November 8.4 3.7× Rouen Normandy, France 1 2 December 8.4 3.7× La Roche-sur-Yon Pays de la Loire, France 1 2 December 7.8 3.7× Lisieux Normandy, France 1 2 December 6.9 3.7× Coulommiers Île-de-France, France 1 2 December 9.0 3.6× Roeselare Flanders, Belgium 2 1 December 8.8 3.6× Valenciennes Hauts-de-France, France 1 2 December 8.4 3.5× Kortrijk Flanders, Belgium 3 1 December 8.4 3.4× Nantes Pays de la Loire, France 1 2 December 8.1 3.4× Lille Hauts-de-France, France 1 30 November 7.8 3.4× Zwijndrecht Flanders, Belgium 1 30 November 7.7 3.4× Sainte-Geneviève-des-Bois Île-de-France, France 2 2 December 12.3 3.3× Menen Flanders, Belgium 3 1 December 8.8 3.3× Roubaix Hauts-de-France, France 3 2 December 8.7 3.3× Dieppe Normandy, France 2 1 December 8.4 3.3× Melun Île-de-France, France 1 2 December 8.1 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, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.
Against other episodes in France and Belgium
Number 12 of 40 episodes in France and Belgium since our records began, by cities reached.
Europe, 28 February to 4 March 2023 279 Europe, December 2025 to January 2026 169 Europe, March 2023 121 Western Europe, January 2024 117 Europe, 14 to 15 January 2025 90 Western Europe, December 2024 75 Spain, France and Portugal, February 2023 72 France, The Netherlands and United Kingdom, January 2023 66 Europe, June 2025 65 Western Europe, January 2025 50 Spain, France and 2 more countries, December 2023 to January 2024 44 France, Belgium and 2 more countries, November and December 2023 43 Bars: cities reached; colour: the level of the episode's highest daily reading. All 40 .
Use this page SmogRank, France, Belgium and 2 more countries, 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-2-more-countries (accessed 4 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.
