SmogRank / Episodes / Italy
Italy and Switzerland, February 2024
For 8 days, from 15 to 22 February 2024, 25 cities in Italy, Switzerland and France had PM2.5 at least twice their usual for the time of year. The worst reading was Vigevano, Lombardy, Italy: 96.7 µg/m³ on 18 February, about 5.2× its usual 18.6.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 25 in 3 countries
Days 8 15 to 22 February 2024
Worst day 19 February 19 cities counted
Furthest above usual 8.4× Lodi
Day by day
Play 19 February 19 cities at twice their usual or more
Monza Saronno Treviglio La Spezia Cremona Dalmine Bergamo Varese Lecco Sondrio Menton Monaco Bastia Nice Cannes Fréjus Sallanches Bern Bolzano Albertville Gap Annecy Annemasse Chambéry Meylan Grenoble Manosque La Garde Aix-en-Provence Gardanne Marseille Lons-le-Saunier Romans-sur-Isère Vitrolles Marignane Bourg-en-Bresse Salon-de-Provence Valence Meyzieu Dole Fos-sur-Mer Lyon Mâcon Villefranche-sur-Saône Ancona Arles Saint-Chamond Chalon-sur-Saône Saint-Étienne Nîmes Civitanova Marche Lunel Montceau-les-Mines Montpellier Rijeka Klagenfurt am Wörthersee Wolfsberg Pesaro Avignon Falconara Marittima Jesi Turin Capannori Aosta Lugano Bellinzona Borgomanero Alessandria Fabriano Trento Rovereto Erba Novara Vigevano Brescia Bra Milan Pavia Vimercate Como Mantua Lodi 12 Feb 13 14 15 16 17 18 19 20 21 22 23 24 25 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
Brescia Brescia, 12 February: 9.8 µg/m³, 0.8× usual Brescia, 13 February: 28.1 µg/m³, 2.2× usual Brescia, 14 February: 17.4 µg/m³, 1.4× usual Brescia, 15 February: 50.6 µg/m³, 4.0× usual Brescia, 16 February: 68.3 µg/m³, 5.3× usual Brescia, 17 February: 55.4 µg/m³, 4.3× usual Brescia, 18 February: 23.9 µg/m³, 1.9× usual Brescia, 19 February: 26.3 µg/m³, 2.1× usual Brescia, 20 February: 24.8 µg/m³, 1.9× usual Brescia, 21 February: 13.6 µg/m³, 1.1× usual Brescia, 22 February: 13.3 µg/m³, 1.0× usual Brescia, 23 February: 2.5 µg/m³, 0.2× usual Brescia, 24 February: 9.4 µg/m³, 0.7× usual Brescia, 25 February: 7.1 µg/m³, 0.6× usual Mantua Mantua, 12 February: 8.6 µg/m³, 0.8× usual Mantua, 13 February: 26.3 µg/m³, 2.3× usual Mantua, 14 February: 26.1 µg/m³, 2.3× usual Mantua, 15 February: 40.8 µg/m³, 3.6× usual Mantua, 16 February: 55.1 µg/m³, 4.9× usual Mantua, 17 February: 70.7 µg/m³, 6.3× usual Mantua, 18 February: 59.1 µg/m³, 5.2× usual Mantua, 19 February: 83.8 µg/m³, 7.4× usual Mantua, 20 February: 74.0 µg/m³, 6.5× usual Mantua, 21 February: 33.8 µg/m³, 3.0× usual Mantua, 22 February: 42.1 µg/m³, 3.7× usual Mantua, 23 February: 8.9 µg/m³, 0.8× usual Mantua, 24 February: 12.8 µg/m³, 1.1× usual Mantua, 25 February: 11.6 µg/m³, 1.0× usual Milan Milan, 12 February: no reading Milan, 13 February: 28.4 µg/m³, 1.9× usual Milan, 14 February: no reading Milan, 15 February: 56.1 µg/m³, 3.7× usual Milan, 16 February: 65.9 µg/m³, 4.4× usual Milan, 17 February: 80.1 µg/m³, 5.3× usual Milan, 18 February: 77.9 µg/m³, 5.2× usual Milan, 19 February: 83.2 µg/m³, 5.5× usual Milan, 20 February: 83.2 µg/m³, 5.5× usual Milan, 21 February: no reading Milan, 22 February: 47.1 µg/m³, 3.1× usual Milan, 23 February: 6.9 µg/m³, 0.5× usual Milan, 24 February: 17.3 µg/m³, 1.1× usual Milan, 25 February: 9.6 µg/m³, 0.6× usual Vigevano Vigevano, 12 February: 22.1 µg/m³, 1.2× usual Vigevano, 13 February: 17.0 µg/m³, 0.9× usual Vigevano, 14 February: 34.2 µg/m³, 1.8× usual Vigevano, 15 February: 47.0 µg/m³, 2.5× usual Vigevano, 16 February: 62.6 µg/m³, 3.4× usual Vigevano, 17 February: 64.7 µg/m³, 3.5× usual Vigevano, 18 February: 96.7 µg/m³, 5.2× usual Vigevano, 19 February: 95.0 µg/m³, 5.1× usual Vigevano, 20 February: 80.7 µg/m³, 4.3× usual Vigevano, 21 February: 55.4 µg/m³, 3.0× usual Vigevano, 22 February: 54.4 µg/m³, 2.9× usual Vigevano, 23 February: 13.6 µg/m³, 0.7× usual Vigevano, 24 February: 19.4 µg/m³, 1.0× usual Vigevano, 25 February: 18.3 µg/m³, 1.0× usual Pavia Pavia, 12 February: 18.7 µg/m³, 1.2× usual Pavia, 13 February: 20.0 µg/m³, 1.3× usual Pavia, 14 February: 23.1 µg/m³, 1.5× usual Pavia, 15 February: 41.0 µg/m³, 2.6× usual Pavia, 16 February: 59.7 µg/m³, 3.8× usual Pavia, 17 February: 68.7 µg/m³, 4.4× usual Pavia, 18 February: 80.6 µg/m³, 5.1× usual Pavia, 19 February: 86.7 µg/m³, 5.5× usual Pavia, 20 February: 74.0 µg/m³, 4.7× usual Pavia, 21 February: 46.2 µg/m³, 2.9× usual Pavia, 22 February: 49.2 µg/m³, 3.1× usual Pavia, 23 February: 10.2 µg/m³, 0.6× usual Pavia, 24 February: 17.5 µg/m³, 1.1× usual Pavia, 25 February: 17.8 µg/m³, 1.1× usual Lodi Lodi, 12 February: 14.2 µg/m³, 1.4× usual Lodi, 13 February: 16.5 µg/m³, 1.6× usual Lodi, 14 February: 22.0 µg/m³, 2.2× usual Lodi, 15 February: 40.0 µg/m³, 4.0× usual Lodi, 16 February: 58.0 µg/m³, 5.7× usual Lodi, 17 February: 67.8 µg/m³, 6.7× usual Lodi, 18 February: 84.9 µg/m³, 8.4× usual Lodi, 19 February: 72.1 µg/m³, 7.1× usual Lodi, 20 February: 69.9 µg/m³, 6.9× usual Lodi, 21 February: 37.4 µg/m³, 3.7× usual Lodi, 22 February: 35.8 µg/m³, 3.5× usual Lodi, 23 February: 7.1 µg/m³, 0.7× usual Lodi, 24 February: 8.8 µg/m³, 0.9× usual Lodi, 25 February: 7.0 µg/m³, 0.7× usual Vimercate Vimercate, 12 February: 2.6 µg/m³, 0.2× usual Vimercate, 13 February: 20.5 µg/m³, 1.7× usual Vimercate, 14 February: no reading Vimercate, 15 February: 36.3 µg/m³, 3.0× usual Vimercate, 16 February: 48.8 µg/m³, 4.1× usual Vimercate, 17 February: 57.9 µg/m³, 4.8× usual Vimercate, 18 February: 65.0 µg/m³, 5.4× usual Vimercate, 19 February: 57.5 µg/m³, 4.8× usual Vimercate, 20 February: 67.9 µg/m³, 5.7× usual Vimercate, 21 February: 50.7 µg/m³, 4.2× usual Vimercate, 22 February: 25.6 µg/m³, 2.1× usual Vimercate, 23 February: 16.6 µg/m³, 1.4× usual Vimercate, 24 February: no reading Vimercate, 25 February: 1.2 µg/m³, 0.1× usual Como Como, 12 February: 15.5 µg/m³, 1.8× usual Como, 13 February: 13.9 µg/m³, 1.6× usual Como, 14 February: 14.5 µg/m³, 1.7× usual Como, 15 February: 30.8 µg/m³, 3.6× usual Como, 16 February: 47.0 µg/m³, 5.5× usual Como, 17 February: 45.0 µg/m³, 5.3× usual Como, 18 February: 51.1 µg/m³, 6.0× usual Como, 19 February: 44.0 µg/m³, 5.2× usual Como, 20 February: 41.5 µg/m³, 4.9× usual Como, 21 February: 27.2 µg/m³, 3.2× usual Como, 22 February: 38.3 µg/m³, 4.5× usual Como, 23 February: 3.0 µg/m³, 0.4× usual Como, 24 February: 5.6 µg/m³, 0.7× usual Como, 25 February: 6.4 µg/m³, 0.8× usual Erba Erba, 12 February: 15.1 µg/m³, 1.3× usual Erba, 13 February: 14.9 µg/m³, 1.3× usual Erba, 14 February: 16.8 µg/m³, 1.5× usual Erba, 15 February: 29.3 µg/m³, 2.6× usual Erba, 16 February: 45.9 µg/m³, 4.1× usual Erba, 17 February: 50.1 µg/m³, 4.5× usual Erba, 18 February: 44.0 µg/m³, 3.9× usual Erba, 19 February: 49.5 µg/m³, 4.4× usual Erba, 20 February: 46.9 µg/m³, 4.2× usual Erba, 21 February: 23.1 µg/m³, 2.1× usual Erba, 22 February: 31.2 µg/m³, 2.8× usual Erba, 23 February: 5.9 µg/m³, 0.5× usual Erba, 24 February: 7.3 µg/m³, 0.7× usual Erba, 25 February: 8.0 µg/m³, 0.7× usual Novara Novara, 12 February: 22.7 µg/m³, 1.7× usual Novara, 13 February: 17.2 µg/m³, 1.3× usual Novara, 14 February: 20.7 µg/m³, 1.6× usual Novara, 15 February: 29.1 µg/m³, 2.2× usual Novara, 16 February: 43.9 µg/m³, 3.3× usual Novara, 17 February: 44.6 µg/m³, 3.4× usual Novara, 18 February: 57.8 µg/m³, 4.3× usual Novara, 19 February: 65.9 µg/m³, 5.0× usual Novara, 20 February: 41.8 µg/m³, 3.1× usual Novara, 21 February: 48.5 µg/m³, 3.6× usual Novara, 22 February: 39.5 µg/m³, 3.0× usual Novara, 23 February: 9.2 µg/m³, 0.7× usual Novara, 24 February: 17.9 µg/m³, 1.3× usual Novara, 25 February: 11.4 µg/m³, 0.9× usual Avignon Avignon, 12 February: 8.9 µg/m³, 0.7× usual Avignon, 13 February: 10.4 µg/m³, 0.8× usual Avignon, 14 February: 20.3 µg/m³, 1.6× usual Avignon, 15 February: 25.1 µg/m³, 2.0× usual Avignon, 16 February: 30.5 µg/m³, 2.5× usual Avignon, 17 February: 4.4 µg/m³, 0.4× usual Avignon, 18 February: 7.2 µg/m³, 0.6× usual Avignon, 19 February: 4.6 µg/m³, 0.4× usual Avignon, 20 February: 3.7 µg/m³, 0.3× usual Avignon, 21 February: 12.4 µg/m³, 1.0× usual Avignon, 22 February: 12.0 µg/m³, 1.0× usual Avignon, 23 February: 4.4 µg/m³, 0.4× usual Avignon, 24 February: 9.8 µg/m³, 0.8× usual Avignon, 25 February: 9.1 µg/m³, 0.7× usual Capannori Capannori, 12 February: 25.0 µg/m³, 1.1× usual Capannori, 13 February: 23.9 µg/m³, 1.0× usual Capannori, 14 February: 34.8 µg/m³, 1.5× usual Capannori, 15 February: 36.7 µg/m³, 1.6× usual Capannori, 16 February: 62.3 µg/m³, 2.7× usual Capannori, 17 February: 57.0 µg/m³, 2.4× usual Capannori, 18 February: 53.3 µg/m³, 2.3× usual Capannori, 19 February: 39.3 µg/m³, 1.7× usual Capannori, 20 February: 52.3 µg/m³, 2.2× usual Capannori, 21 February: 38.0 µg/m³, 1.6× usual Capannori, 22 February: 28.4 µg/m³, 1.2× usual Capannori, 23 February: 11.3 µg/m³, 0.5× usual Capannori, 24 February: 15.0 µg/m³, 0.6× usual Capannori, 25 February: 23.4 µg/m³, 1.0× usual Bra Bra, 12 February: 13.6 µg/m³, 1.2× usual Bra, 13 February: 13.5 µg/m³, 1.2× usual Bra, 14 February: 17.0 µg/m³, 1.6× usual Bra, 15 February: 28.1 µg/m³, 2.6× usual Bra, 16 February: 42.8 µg/m³, 3.9× usual Bra, 17 February: 44.5 µg/m³, 4.1× usual Bra, 18 February: 49.0 µg/m³, 4.5× usual Bra, 19 February: 51.7 µg/m³, 4.7× usual Bra, 20 February: 29.5 µg/m³, 2.7× usual Bra, 21 February: 28.3 µg/m³, 2.6× usual Bra, 22 February: 59.5 µg/m³, 5.5× usual Bra, 23 February: 15.1 µg/m³, 1.4× usual Bra, 24 February: 20.4 µg/m³, 1.9× usual Bra, 25 February: 18.9 µg/m³, 1.7× usual Turin Turin, 12 February: no reading Turin, 13 February: no reading Turin, 14 February: no reading Turin, 15 February: no reading Turin, 16 February: no reading Turin, 17 February: 57.0 µg/m³, 2.3× usual Turin, 18 February: 59.8 µg/m³, 2.5× usual Turin, 19 February: 63.1 µg/m³, 2.6× usual Turin, 20 February: 38.2 µg/m³, 1.6× usual Turin, 21 February: 39.8 µg/m³, 1.6× usual Turin, 22 February: 43.0 µg/m³, 1.8× usual Turin, 23 February: 13.1 µg/m³, 0.5× usual Turin, 24 February: 18.9 µg/m³, 0.8× usual Turin, 25 February: 12.8 µg/m³, 0.5× usual Rovereto Rovereto, 12 February: 7.4 µg/m³, 0.6× usual Rovereto, 13 February: 6.2 µg/m³, 0.5× usual Rovereto, 14 February: 9.3 µg/m³, 0.7× usual Rovereto, 15 February: 13.2 µg/m³, 1.0× usual Rovereto, 16 February: 23.8 µg/m³, 1.8× usual Rovereto, 17 February: 25.7 µg/m³, 1.9× usual Rovereto, 18 February: 36.4 µg/m³, 2.8× usual Rovereto, 19 February: 51.1 µg/m³, 3.9× usual Rovereto, 20 February: 22.4 µg/m³, 1.7× usual Rovereto, 21 February: 17.6 µg/m³, 1.3× usual Rovereto, 22 February: 26.2 µg/m³, 2.0× usual Rovereto, 23 February: 3.0 µg/m³, 0.2× usual Rovereto, 24 February: 9.5 µg/m³, 0.7× usual Rovereto, 25 February: 6.5 µg/m³, 0.5× usual Lugano Lugano, 12 February: 6.5 µg/m³, 0.5× usual Lugano, 13 February: 5.0 µg/m³, 0.4× usual Lugano, 14 February: 5.9 µg/m³, 0.5× usual Lugano, 15 February: 8.4 µg/m³, 0.6× usual Lugano, 16 February: 16.6 µg/m³, 1.3× usual Lugano, 17 February: 20.3 µg/m³, 1.6× usual Lugano, 18 February: 32.4 µg/m³, 2.5× usual Lugano, 19 February: 31.7 µg/m³, 2.4× usual Lugano, 20 February: 2.6 µg/m³, 0.2× usual Lugano, 21 February: 16.8 µg/m³, 1.3× usual Lugano, 22 February: 37.7 µg/m³, 2.9× usual Lugano, 23 February: 3.2 µg/m³, 0.2× usual Lugano, 24 February: 3.7 µg/m³, 0.3× usual Lugano, 25 February: 7.4 µg/m³, 0.6× usual Borgomanero Borgomanero, 12 February: 20.1 µg/m³, 1.5× usual Borgomanero, 13 February: 16.0 µg/m³, 1.2× usual Borgomanero, 14 February: 14.8 µg/m³, 1.1× usual Borgomanero, 15 February: 17.5 µg/m³, 1.3× usual Borgomanero, 16 February: 25.1 µg/m³, 1.9× usual Borgomanero, 17 February: 27.2 µg/m³, 2.1× usual Borgomanero, 18 February: 31.8 µg/m³, 2.4× usual Borgomanero, 19 February: 32.9 µg/m³, 2.5× usual Borgomanero, 20 February: 12.0 µg/m³, 0.9× usual Borgomanero, 21 February: 34.9 µg/m³, 2.6× usual Borgomanero, 22 February: 45.5 µg/m³, 3.4× usual Borgomanero, 23 February: 11.0 µg/m³, 0.8× usual Borgomanero, 24 February: 10.3 µg/m³, 0.8× usual Borgomanero, 25 February: 8.1 µg/m³, 0.6× usual Trento Trento, 12 February: 6.8 µg/m³, 0.5× usual Trento, 13 February: 9.5 µg/m³, 0.7× usual Trento, 14 February: 11.7 µg/m³, 0.8× usual Trento, 15 February: 14.3 µg/m³, 1.0× usual Trento, 16 February: 18.5 µg/m³, 1.3× usual Trento, 17 February: 21.7 µg/m³, 1.5× usual Trento, 18 February: 31.7 µg/m³, 2.2× usual Trento, 19 February: 55.3 µg/m³, 3.8× usual Trento, 20 February: 14.1 µg/m³, 1.0× usual Trento, 21 February: 15.7 µg/m³, 1.1× usual Trento, 22 February: 28.8 µg/m³, 2.0× usual Trento, 23 February: 6.1 µg/m³, 0.4× usual Trento, 24 February: 6.7 µg/m³, 0.5× usual Trento, 25 February: 8.3 µg/m³, 0.6× usual Jesi Jesi, 12 February: 17.4 µg/m³, 0.8× usual Jesi, 13 February: 23.5 µg/m³, 1.1× usual Jesi, 14 February: 29.3 µg/m³, 1.4× usual Jesi, 15 February: 32.8 µg/m³, 1.6× usual Jesi, 16 February: no reading Jesi, 17 February: no reading Jesi, 18 February: no reading Jesi, 19 February: 54.7 µg/m³, 2.6× usual Jesi, 20 February: 32.1 µg/m³, 1.5× usual Jesi, 21 February: 22.6 µg/m³, 1.1× usual Jesi, 22 February: 22.7 µg/m³, 1.1× usual Jesi, 23 February: 18.2 µg/m³, 0.9× usual Jesi, 24 February: 19.1 µg/m³, 0.9× usual Jesi, 25 February: 20.0 µg/m³, 1.0× usual Fabriano Fabriano, 12 February: 11.1 µg/m³, 0.8× usual Fabriano, 13 February: 20.0 µg/m³, 1.5× usual Fabriano, 14 February: 18.5 µg/m³, 1.4× usual Fabriano, 15 February: 16.7 µg/m³, 1.2× usual Fabriano, 16 February: no reading Fabriano, 17 February: no reading Fabriano, 18 February: no reading Fabriano, 19 February: 51.5 µg/m³, 3.8× usual Fabriano, 20 February: 28.2 µg/m³, 2.1× usual Fabriano, 21 February: 13.1 µg/m³, 1.0× usual Fabriano, 22 February: 12.4 µg/m³, 0.9× usual Fabriano, 23 February: 8.9 µg/m³, 0.7× usual Fabriano, 24 February: 8.9 µg/m³, 0.7× usual Fabriano, 25 February: 10.1 µg/m³, 0.7× usual Falconara Marittima Falconara Marittima, 12 February: 11.3 µg/m³, 0.6× usual Falconara Marittima, 13 February: 22.8 µg/m³, 1.2× usual Falconara Marittima, 14 February: 26.8 µg/m³, 1.4× usual Falconara Marittima, 15 February: 28.9 µg/m³, 1.5× usual Falconara Marittima, 16 February: no reading Falconara Marittima, 17 February: no reading Falconara Marittima, 18 February: no reading Falconara Marittima, 19 February: 48.2 µg/m³, 2.6× usual Falconara Marittima, 20 February: 32.9 µg/m³, 1.7× usual Falconara Marittima, 21 February: 18.7 µg/m³, 1.0× usual Falconara Marittima, 22 February: 13.8 µg/m³, 0.7× usual Falconara Marittima, 23 February: 11.0 µg/m³, 0.6× usual Falconara Marittima, 24 February: 9.2 µg/m³, 0.5× usual Falconara Marittima, 25 February: 12.6 µg/m³, 0.7× usual Alessandria Alessandria, 12 February: 20.0 µg/m³, 1.2× usual Alessandria, 13 February: 21.0 µg/m³, 1.3× usual Alessandria, 14 February: 23.3 µg/m³, 1.4× usual Alessandria, 15 February: 29.6 µg/m³, 1.8× usual Alessandria, 16 February: no reading Alessandria, 17 February: no reading Alessandria, 18 February: no reading Alessandria, 19 February: no reading Alessandria, 20 February: 63.1 µg/m³, 3.8× usual Alessandria, 21 February: 41.1 µg/m³, 2.5× usual Alessandria, 22 February: 40.3 µg/m³, 2.4× usual Alessandria, 23 February: 11.6 µg/m³, 0.7× usual Alessandria, 24 February: 16.0 µg/m³, 1.0× usual Alessandria, 25 February: 20.8 µg/m³, 1.2× usual Pesaro Pesaro, 12 February: 10.8 µg/m³, 0.7× usual Pesaro, 13 February: 26.8 µg/m³, 1.7× usual Pesaro, 14 February: 31.9 µg/m³, 2.0× usual Pesaro, 15 February: 35.6 µg/m³, 2.2× usual Pesaro, 16 February: no reading Pesaro, 17 February: no reading Pesaro, 18 February: no reading Pesaro, 19 February: no reading Pesaro, 20 February: 37.4 µg/m³, 2.4× usual Pesaro, 21 February: 20.2 µg/m³, 1.3× usual Pesaro, 22 February: 9.9 µg/m³, 0.6× usual Pesaro, 23 February: 5.8 µg/m³, 0.4× usual Pesaro, 24 February: 5.8 µg/m³, 0.4× usual Pesaro, 25 February: 7.1 µg/m³, 0.4× usual Bellinzona Bellinzona, 12 February: 5.4 µg/m³, 0.4× usual Bellinzona, 13 February: 6.6 µg/m³, 0.5× usual Bellinzona, 14 February: 7.3 µg/m³, 0.5× usual Bellinzona, 15 February: 8.4 µg/m³, 0.6× usual Bellinzona, 16 February: 11.4 µg/m³, 0.9× usual Bellinzona, 17 February: 15.1 µg/m³, 1.1× usual Bellinzona, 18 February: 21.7 µg/m³, 1.6× usual Bellinzona, 19 February: 17.6 µg/m³, 1.3× usual Bellinzona, 20 February: 1.4 µg/m³, 0.1× usual Bellinzona, 21 February: 13.8 µg/m³, 1.0× usual Bellinzona, 22 February: 39.4 µg/m³, 3.0× usual Bellinzona, 23 February: 2.4 µg/m³, 0.2× usual Bellinzona, 24 February: 3.0 µg/m³, 0.2× usual Bellinzona, 25 February: 8.5 µg/m³, 0.6× usual Aosta Aosta, 12 February: 7.4 µg/m³, 0.7× usual Aosta, 13 February: 8.5 µg/m³, 0.8× usual Aosta, 14 February: 12.1 µg/m³, 1.1× usual Aosta, 15 February: 13.4 µg/m³, 1.3× usual Aosta, 16 February: 16.8 µg/m³, 1.6× usual Aosta, 17 February: 13.6 µg/m³, 1.3× usual Aosta, 18 February: 18.7 µg/m³, 1.7× usual Aosta, 19 February: 2.4 µg/m³, 0.2× usual Aosta, 20 February: 2.3 µg/m³, 0.2× usual Aosta, 21 February: 21.7 µg/m³, 2.0× usual Aosta, 22 February: 30.9 µg/m³, 2.9× usual Aosta, 23 February: 6.8 µg/m³, 0.6× usual Aosta, 24 February: 7.7 µg/m³, 0.7× usual Aosta, 25 February: 7.4 µg/m³, 0.7× usual 12 Feb 14 16 18 20 22 24 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
Lodi Lombardy, Italy 8 18 February 10.1 8.4× Mantua Lombardy, Italy 8 19 February 11.3 7.4× Como Lombardy, Italy 8 18 February 8.5 6.0× Vimercate Lombardy, Italy 8 20 February 12.0 5.7× Pavia Lombardy, Italy 8 19 February 15.7 5.5× Milan Lombardy, Italy 7 19 February 15.1 5.5× Bra Piedmont, Italy 7 22 February 10.9 5.5× Brescia Lombardy, Italy 4 16 February 12.8 5.3× Vigevano Lombardy, Italy 8 18 February 18.6 5.2× Novara Piedmont, Italy 8 19 February 13.3 5.0× Erba Lombardy, Italy 7 17 February 11.2 4.5× Rovereto Trentino-Alto Adige, Italy 3 19 February 13.2 3.9× Trento Trentino-Alto Adige, Italy 3 19 February 14.4 3.8× Fabriano The Marches, Italy 2 19 February 13.6 3.8× Alessandria Piedmont, Italy 3 20 February 16.7 3.8× Borgomanero Piedmont, Italy 4 22 February 13.2 3.4× Bellinzona Ticino, Switzerland 1 22 February 13.3 3.0× Lugano Ticino, Switzerland 3 22 February 13.0 2.9× Aosta Aosta Valley, Italy 1 22 February 10.7 2.9× Capannori Tuscany, Italy 4 16 February 23.4 2.7× Jesi The Marches, Italy 1 19 February 21.0 2.6× Turin Piedmont, Italy 3 19 February 24.3 2.6× Falconara Marittima The Marches, Italy 1 19 February 18.9 2.6× Avignon Provence-Alpes-Côte d'Azur, France 2 16 February 12.4 2.5× Pesaro The Marches, Italy 1 20 February 15.9 2.4×
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 Italy and Switzerland
The largest of 4 episodes in Italy and Switzerland since our records began, by cities reached.
Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Italy and Switzerland, February 2024: 25 cities with PM2.5 at twice their usual or more, 15 to 22 February 2024, smogrank.com/episodes/2024-02-italy-and-switzerland (accessed 3 October 2026).
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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.
