SmogRank / Episodes / Serbia
Serbia, Kosovo and 2 more countries, April 2023
For 5 days, from 7 to 11 April 2023, 19 cities in Serbia, Kosovo, Croatia and 1 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Valjevo, Central Serbia, Serbia: 72.0 µg/m³ on 8 April, about 2.9× its usual 25.1.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 19 in 4 countries
Days 5 7 to 11 April 2023
Worst day 8 April 18 cities counted
Furthest above usual 5.4× Pristina
Day by day
Play 8 April 18 cities at twice their usual or more
Ćuprija Užice Szeged Craiova Sofia Pécs Sevlievo Banja Luka Gabrovo Ruse Bucharest Dimitrovgrad Haskovo Bor Sremčica Niš Pirot Novi Pazar Botevgrad Belgrade Čačak Valjevo Kragujevac Obrenovac Futog Zemun Lazarevac Liberpolis Novi Sad Pančevo Smederevo Pristina 4 Apr 5 6 7 8 9 10 11 12 13 14 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
Novi Pazar Novi Pazar, 4 April: 27.1 µg/m³ Novi Pazar, 5 April: 29.9 µg/m³ Novi Pazar, 6 April: no reading Novi Pazar, 7 April: 57.4 µg/m³, 2.3× its usual 25.1 Novi Pazar, 8 April: 56.2 µg/m³, 2.2× its usual 25.1 Novi Pazar, 9 April: 71.0 µg/m³, 2.8× its usual 25.1 Novi Pazar, 10 April: 35.3 µg/m³ Novi Pazar, 11 April: 58.1 µg/m³, 2.4× its usual 24.4 Novi Pazar, 12 April: 40.2 µg/m³ Novi Pazar, 13 April: no reading Novi Pazar, 14 April: no reading Pristina Pristina, 4 April: 24.8 µg/m³ Pristina, 5 April: 31.8 µg/m³ Pristina, 6 April: 36.3 µg/m³ Pristina, 7 April: 52.1 µg/m³, 5.4× its usual 9.7 Pristina, 8 April: 41.3 µg/m³, 4.3× its usual 9.6 Pristina, 9 April: 32.0 µg/m³, 3.4× its usual 9.5 Pristina, 10 April: 28.6 µg/m³, 3.0× its usual 9.4 Pristina, 11 April: 35.6 µg/m³, 3.8× its usual 9.3 Pristina, 12 April: 31.6 µg/m³ Pristina, 13 April: 36.9 µg/m³ Pristina, 14 April: 26.3 µg/m³ Pirot Pirot, 4 April: 18.5 µg/m³ Pirot, 5 April: 23.3 µg/m³ Pirot, 6 April: no reading Pirot, 7 April: 52.1 µg/m³, 2.8× its usual 18.9 Pirot, 8 April: 50.6 µg/m³, 2.7× its usual 18.9 Pirot, 9 April: 35.6 µg/m³ Pirot, 10 April: 35.8 µg/m³ Pirot, 11 April: 27.0 µg/m³ Pirot, 12 April: 22.7 µg/m³ Pirot, 13 April: no reading Pirot, 14 April: no reading Kragujevac Kragujevac, 4 April: 16.0 µg/m³ Kragujevac, 5 April: 20.6 µg/m³ Kragujevac, 6 April: no reading Kragujevac, 7 April: 50.8 µg/m³, 3.0× its usual 17.0 Kragujevac, 8 April: 42.8 µg/m³, 2.5× its usual 17.0 Kragujevac, 9 April: 39.5 µg/m³, 2.3× its usual 17.0 Kragujevac, 10 April: 38.2 µg/m³, 2.2× its usual 17.0 Kragujevac, 11 April: 36.6 µg/m³, 2.2× its usual 16.9 Kragujevac, 12 April: 15.3 µg/m³ Kragujevac, 13 April: no reading Kragujevac, 14 April: no reading Niš Niš, 4 April: 13.1 µg/m³ Niš, 5 April: 21.9 µg/m³ Niš, 6 April: 38.5 µg/m³ Niš, 7 April: 50.5 µg/m³, 2.8× its usual 18.1 Niš, 8 April: 38.8 µg/m³, 2.1× its usual 18.2 Niš, 9 April: 40.0 µg/m³, 2.2× its usual 18.3 Niš, 10 April: 27.2 µg/m³ Niš, 11 April: 33.7 µg/m³ Niš, 12 April: 24.1 µg/m³ Niš, 13 April: 22.4 µg/m³ Niš, 14 April: 18.9 µg/m³ Lazarevac Lazarevac, 4 April: 16.3 µg/m³ Lazarevac, 5 April: 22.2 µg/m³ Lazarevac, 6 April: no reading Lazarevac, 7 April: 41.8 µg/m³, 2.1× its usual 19.5 Lazarevac, 8 April: 62.2 µg/m³, 3.2× its usual 19.5 Lazarevac, 9 April: 62.4 µg/m³, 3.2× its usual 19.3 Lazarevac, 10 April: 46.4 µg/m³, 2.4× its usual 19.1 Lazarevac, 11 April: 41.6 µg/m³, 2.2× its usual 18.9 Lazarevac, 12 April: 17.3 µg/m³ Lazarevac, 13 April: no reading Lazarevac, 14 April: no reading Pančevo Pančevo, 4 April: 13.2 µg/m³ Pančevo, 5 April: 18.8 µg/m³ Pančevo, 6 April: no reading Pančevo, 7 April: 41.4 µg/m³, 2.6× its usual 16.1 Pančevo, 8 April: 53.0 µg/m³, 3.4× its usual 15.8 Pančevo, 9 April: 46.7 µg/m³, 3.0× its usual 15.8 Pančevo, 10 April: 29.9 µg/m³ Pančevo, 11 April: 26.4 µg/m³ Pančevo, 12 April: 10.2 µg/m³ Pančevo, 13 April: no reading Pančevo, 14 April: no reading Zemun Zemun, 4 April: 16.2 µg/m³ Zemun, 5 April: 19.8 µg/m³ Zemun, 6 April: no reading Zemun, 7 April: 36.9 µg/m³, 2.2× its usual 16.6 Zemun, 8 April: 52.1 µg/m³, 3.2× its usual 16.5 Zemun, 9 April: 42.6 µg/m³, 2.6× its usual 16.5 Zemun, 10 April: 37.8 µg/m³, 2.3× its usual 16.4 Zemun, 11 April: 30.8 µg/m³ Zemun, 12 April: 13.3 µg/m³ Zemun, 13 April: no reading Zemun, 14 April: no reading Smederevo Smederevo, 4 April: 10.7 µg/m³ Smederevo, 5 April: 17.3 µg/m³ Smederevo, 6 April: no reading Smederevo, 7 April: 35.0 µg/m³, 2.0× its usual 17.1 Smederevo, 8 April: 61.2 µg/m³, 3.6× its usual 17.0 Smederevo, 9 April: 49.7 µg/m³, 2.9× its usual 17.0 Smederevo, 10 April: 27.1 µg/m³ Smederevo, 11 April: 35.2 µg/m³, 2.1× its usual 16.7 Smederevo, 12 April: 15.1 µg/m³ Smederevo, 13 April: no reading Smederevo, 14 April: no reading Belgrade Belgrade, 4 April: 13.4 µg/m³ Belgrade, 5 April: 15.8 µg/m³ Belgrade, 6 April: 26.8 µg/m³ Belgrade, 7 April: 34.2 µg/m³, 2.1× its usual 16.1 Belgrade, 8 April: 45.8 µg/m³, 2.9× its usual 15.8 Belgrade, 9 April: 40.4 µg/m³, 2.6× its usual 15.7 Belgrade, 10 April: 30.7 µg/m³ Belgrade, 11 April: 30.3 µg/m³, 2.0× its usual 15.1 Belgrade, 12 April: 8.8 µg/m³ Belgrade, 13 April: 13.4 µg/m³ Belgrade, 14 April: 7.8 µg/m³ Novi Sad Novi Sad, 4 April: no reading Novi Sad, 5 April: no reading Novi Sad, 6 April: no reading Novi Sad, 7 April: 32.2 µg/m³, 2.4× its usual 13.2 Novi Sad, 8 April: 43.1 µg/m³, 3.4× its usual 12.7 Novi Sad, 9 April: 36.5 µg/m³, 2.9× its usual 12.6 Novi Sad, 10 April: 26.2 µg/m³, 2.1× its usual 12.6 Novi Sad, 11 April: 21.3 µg/m³ Novi Sad, 12 April: 9.0 µg/m³ Novi Sad, 13 April: no reading Novi Sad, 14 April: no reading Sremčica Sremčica, 4 April: 11.6 µg/m³ Sremčica, 5 April: 16.4 µg/m³ Sremčica, 6 April: no reading Sremčica, 7 April: 32.1 µg/m³, 2.1× its usual 15.4 Sremčica, 8 April: 37.4 µg/m³, 2.5× its usual 14.7 Sremčica, 9 April: 34.9 µg/m³, 2.4× its usual 14.7 Sremčica, 10 April: 31.1 µg/m³, 2.1× its usual 14.6 Sremčica, 11 April: 25.4 µg/m³ Sremčica, 12 April: 7.7 µg/m³ Sremčica, 13 April: no reading Sremčica, 14 April: no reading Futog Futog, 4 April: 16.7 µg/m³ Futog, 5 April: 19.6 µg/m³ Futog, 6 April: no reading Futog, 7 April: 31.5 µg/m³, 2.4× its usual 13.1 Futog, 8 April: 34.9 µg/m³, 2.7× its usual 12.7 Futog, 9 April: 38.7 µg/m³, 3.1× its usual 12.6 Futog, 10 April: 28.0 µg/m³, 2.4× its usual 11.7 Futog, 11 April: 20.3 µg/m³ Futog, 12 April: 7.5 µg/m³ Futog, 13 April: no reading Futog, 14 April: no reading Bor Bor, 4 April: 5.4 µg/m³ Bor, 5 April: 7.5 µg/m³ Bor, 6 April: no reading Bor, 7 April: 27.3 µg/m³, 2.1× its usual 13.2 Bor, 8 April: 32.1 µg/m³, 2.5× its usual 13.1 Bor, 9 April: 30.8 µg/m³, 2.3× its usual 13.2 Bor, 10 April: 21.0 µg/m³ Bor, 11 April: 16.5 µg/m³ Bor, 12 April: 7.1 µg/m³ Bor, 13 April: no reading Bor, 14 April: no reading Liberpolis Liberpolis, 4 April: 8.6 µg/m³ Liberpolis, 5 April: 16.6 µg/m³ Liberpolis, 6 April: 18.8 µg/m³ Liberpolis, 7 April: 25.1 µg/m³, 3.3× its usual 7.7 Liberpolis, 8 April: 24.1 µg/m³ Liberpolis, 9 April: 19.6 µg/m³ Liberpolis, 10 April: 16.5 µg/m³ Liberpolis, 11 April: no reading Liberpolis, 12 April: no reading Liberpolis, 13 April: no reading Liberpolis, 14 April: no reading Valjevo Valjevo, 4 April: 29.6 µg/m³ Valjevo, 5 April: 33.0 µg/m³ Valjevo, 6 April: no reading Valjevo, 7 April: 43.0 µg/m³ Valjevo, 8 April: 72.0 µg/m³, 2.9× its usual 25.1 Valjevo, 9 April: 54.9 µg/m³, 2.3× its usual 24.3 Valjevo, 10 April: 47.9 µg/m³, 2.0× its usual 23.8 Valjevo, 11 April: 41.9 µg/m³ Valjevo, 12 April: 20.9 µg/m³ Valjevo, 13 April: no reading Valjevo, 14 April: no reading Obrenovac Obrenovac, 4 April: 13.6 µg/m³ Obrenovac, 5 April: 16.8 µg/m³ Obrenovac, 6 April: no reading Obrenovac, 7 April: 33.3 µg/m³ Obrenovac, 8 April: 51.9 µg/m³, 3.0× its usual 17.1 Obrenovac, 9 April: 50.5 µg/m³, 3.0× its usual 16.7 Obrenovac, 10 April: 35.2 µg/m³, 2.2× its usual 16.3 Obrenovac, 11 April: 31.8 µg/m³ Obrenovac, 12 April: 11.2 µg/m³ Obrenovac, 13 April: no reading Obrenovac, 14 April: no reading Čačak Čačak, 4 April: 11.2 µg/m³ Čačak, 5 April: 14.1 µg/m³ Čačak, 6 April: no reading Čačak, 7 April: 30.7 µg/m³ Čačak, 8 April: 46.9 µg/m³, 2.9× its usual 16.3 Čačak, 9 April: 38.0 µg/m³, 2.4× its usual 16.0 Čačak, 10 April: 33.2 µg/m³, 2.1× its usual 15.5 Čačak, 11 April: 30.0 µg/m³ Čačak, 12 April: 10.5 µg/m³ Čačak, 13 April: no reading Čačak, 14 April: no reading Botevgrad Botevgrad, 4 April: 5.2 µg/m³ Botevgrad, 5 April: 12.7 µg/m³ Botevgrad, 6 April: 17.8 µg/m³ Botevgrad, 7 April: 22.1 µg/m³ Botevgrad, 8 April: 28.2 µg/m³, 2.9× its usual 9.8 Botevgrad, 9 April: 25.5 µg/m³, 2.6× its usual 9.7 Botevgrad, 10 April: 20.3 µg/m³ Botevgrad, 11 April: 17.5 µg/m³ Botevgrad, 12 April: 7.3 µg/m³ Botevgrad, 13 April: 10.5 µg/m³ Botevgrad, 14 April: 6.5 µg/m³ 4 Apr 6 8 10 12 14 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
Pristina Pristina, Kosovo 5 7 April 9.7 5.4× Smederevo Central Serbia, Serbia 4 8 April 17.0 3.6× Pančevo Vojvodina, Serbia 3 8 April 15.8 3.4× Novi Sad Vojvodina, Serbia 4 8 April 12.7 3.4× Liberpolis County of Osijek-Baranja, Croatia 1 7 April 7.7 3.3× Lazarevac Central Serbia, Serbia 5 9 April 19.3 3.2× Zemun Central Serbia, Serbia 4 8 April 16.5 3.2× Futog Vojvodina, Serbia 4 9 April 12.6 3.1× Obrenovac Central Serbia, Serbia 3 8 April 17.1 3.0× Kragujevac Central Serbia, Serbia 5 7 April 17.0 3.0× Valjevo Central Serbia, Serbia 3 8 April 25.1 2.9× Čačak Central Serbia, Serbia 3 8 April 16.3 2.9× Belgrade Central Serbia, Serbia 4 8 April 15.8 2.9× Botevgrad Sofia, Bulgaria 2 8 April 9.8 2.9× Novi Pazar Central Serbia, Serbia 4 9 April 25.1 2.8× Pirot Central Serbia, Serbia 2 7 April 18.9 2.8× Niš Central Serbia, Serbia 3 7 April 18.1 2.8× Sremčica Central Serbia, Serbia 4 8 April 14.7 2.5× Bor Central Serbia, Serbia 3 8 April 13.1 2.5×
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 Serbia and Kosovo
Number 2 of 2 episodes in Serbia and Kosovo since our records began, by cities reached.
Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Serbia, Kosovo and 2 more countries, April 2023: 19 cities with PM2.5 at twice their usual or more, 7 to 11 April 2023, smogrank.com/episodes/2023-04-serbia-kosovo-and-2-more-countries (accessed 4 October 2026).
Copy citation Download top 10 (PNG)
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.
