SmogRank / Episodes / Poland

Poland, March 2026

For 1 day, on 25 March 2026, 9 cities in Poland, Slovakia and Slovenia had PM2.5 at least twice their usual for the time of year. The worst reading was Łask, Łódź Voivodeship, Poland: 58.4 µg/m³ on 25 March, about 2.6× its usual 22.9.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached9in 3 countries
Days125 March 2026
Worst day25 March9 cities counted
Furthest above usual2.6ףask

Day by day

25 March 9 cities at twice their usual or more
KrakówKatowiceCzechowice-DziedziceŻywiecRadomskoJastrzębie ZdrójČadcaLiptovský MikulášRužomberokKędzierzyn-KoźleŽilinaRacibórzMartinPopradŁódźBanská BystricaZgierzOpolePúchovHandlováZvolenStarachowicePrievidzaŽiar nad HronomDębicaMielecLučenecRadomPartizánskeBardejovŻyrardówTrenčínJasłoKaliszBrzegPrešovPłockPruszkówKazincbarcikaKrosnoKošiceWłocławekNitraKonstancin-JeziornaWarsawRzeszówMiskolcGyöngyösOtwockWawerLegionowoVranov nad TopľouEsztergomWrocławSenicaTrnavaHumennéTrebišovBudapestCiechanówKłodzkoKomárnoGyálToruńSninaSenecPezinokMalackyNyíregyházaGyőrLublinBratislavaBydgoszczDevínska Nová VesPrzemyślDunaújvárosPoznańDebrecenVeszprémOlsztynKlosterneuburgViennaZamośćJelenia GóraElblągMödlingPerchtoldsdorfSzegedKościerzynaGdańskZielona GóraGdyniaPécsSankt PöltenEisenzickenKikindaEłkŻaryZalăuBaia MareŘíčanyGorzów WielkopolskiSighetu MarmaţieiAugustówPragueAmstettenGrazStodůlkyEisenhüttenstadtDejMariborCluj-NapocaFrankfurt (Oder)CottbusKołobrzegSteyrLinzAnsfeldenTraunZagrebLubnjowWolfsbergCeljeWelsSzczecinSchwedt (Oder)TrbovljeStrausbergKönigs WusterhausenNovo MestoNeuenhagenTârgu MureşPassauKlagenfurt am WörtherseeBernau bei BerlinBlankenfelde-MahlowBerlinKranjLjubljanaLuckenwaldeTeltowKleinmachnowOranienburgNeubrandenburgGoriziaKielceJarosławBiałystokTarnówSereďPtujNiskoSuwałkiŁask
22 Mar232425262728
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

ŁaskŁask, 22 March: 47.1 µg/m³, 2.1× usualŁask, 23 March: 62.3 µg/m³, 2.7× usualŁask, 24 March: 105.0 µg/m³, 4.6× usualŁask, 25 March: 58.4 µg/m³, 2.6× usualŁask, 26 March: 32.1 µg/m³, 1.4× usualŁask, 27 March: 28.0 µg/m³, 1.2× usualŁask, 28 March: 36.1 µg/m³, 1.6× usualJarosławJarosław, 22 March: 20.0 µg/m³, 1.4× usualJarosław, 23 March: 43.1 µg/m³, 2.9× usualJarosław, 24 March: 59.1 µg/m³, 4.0× usualJarosław, 25 March: 30.8 µg/m³, 2.1× usualJarosław, 26 March: 18.3 µg/m³, 1.2× usualJarosław, 27 March: 11.0 µg/m³, 0.7× usualJarosław, 28 March: 23.3 µg/m³, 1.6× usualTarnówTarnów, 22 March: 29.0 µg/m³, 1.9× usualTarnów, 23 March: 39.4 µg/m³, 2.6× usualTarnów, 24 March: 55.6 µg/m³, 3.7× usualTarnów, 25 March: 33.0 µg/m³, 2.2× usualTarnów, 26 March: 20.3 µg/m³, 1.3× usualTarnów, 27 March: 11.8 µg/m³, 0.8× usualTarnów, 28 March: 19.6 µg/m³, 1.3× usualSuwałkiSuwałki, 22 March: 22.0 µg/m³, 1.9× usualSuwałki, 23 March: 37.7 µg/m³, 3.2× usualSuwałki, 24 March: 37.0 µg/m³, 3.2× usualSuwałki, 25 March: 28.9 µg/m³, 2.5× usualSuwałki, 26 March: 7.9 µg/m³, 0.7× usualSuwałki, 27 March: 9.1 µg/m³, 0.8× usualSuwałki, 28 March: 10.6 µg/m³, 0.9× usualBiałystokBiałystok, 22 March: 19.6 µg/m³, 1.4× usualBiałystok, 23 March: 30.9 µg/m³, 2.3× usualBiałystok, 24 March: 37.8 µg/m³, 2.8× usualBiałystok, 25 March: 29.6 µg/m³, 2.2× usualBiałystok, 26 March: 11.7 µg/m³, 0.9× usualBiałystok, 27 March: 7.8 µg/m³, 0.6× usualBiałystok, 28 March: 15.8 µg/m³, 1.2× usualKielceKielce, 22 March: 17.4 µg/m³, 1.0× usualKielce, 23 March: 25.1 µg/m³, 1.4× usualKielce, 24 March: 40.3 µg/m³, 2.2× usualKielce, 25 March: 36.8 µg/m³, 2.0× usualKielce, 26 March: 8.2 µg/m³, 0.5× usualKielce, 27 March: 9.1 µg/m³, 0.5× usualKielce, 28 March: 14.2 µg/m³, 0.8× usualNiskoNisko, 22 March: 18.7 µg/m³, 1.2× usualNisko, 23 March: 25.3 µg/m³, 1.6× usualNisko, 24 March: 39.2 µg/m³, 2.5× usualNisko, 25 March: 37.4 µg/m³, 2.4× usualNisko, 26 March: 19.7 µg/m³, 1.3× usualNisko, 27 March: 9.7 µg/m³, 0.6× usualNisko, 28 March: 21.3 µg/m³, 1.4× usualPtujPtuj, 22 March: 16.3 µg/m³, 1.4× usualPtuj, 23 March: 15.1 µg/m³, 1.3× usualPtuj, 24 March: 18.4 µg/m³, 1.6× usualPtuj, 25 March: 27.9 µg/m³, 2.4× usualPtuj, 26 March: 1.2 µg/m³, 0.1× usualPtuj, 27 March: 2.1 µg/m³, 0.2× usualPtuj, 28 March: no readingSereďSereď, 22 March: 11.1 µg/m³, 1.0× usualSereď, 23 March: 14.6 µg/m³, 1.3× usualSereď, 24 March: 19.3 µg/m³, 1.7× usualSereď, 25 March: 26.1 µg/m³, 2.3× usualSereď, 26 March: 3.3 µg/m³, 0.3× usualSereď, 27 March: 9.1 µg/m³, 0.8× usualSereď, 28 March: 10.4 µg/m³, 0.9× usual22 Mar232425262728
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.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
ŁaskŁódź Voivodeship, Poland1 105.024 March22.94.6×
JarosławSubcarpathia, Poland1 59.124 March14.74.0×
TarnówLesser Poland, Poland1 55.624 March15.23.7×
SuwałkiPodlasie, Poland1 37.723 March11.73.2×
BiałystokPodlasie, Poland1 37.824 March13.72.8×
NiskoSubcarpathia, Poland1 39.224 March15.72.5×
PtujUrban Municipality of Ptuj, Slovenia1 27.925 March11.52.4×
SereďTrnava Region, Slovakia1 26.125 March11.32.3×
KielceŚwiętokrzyskie, Poland1 40.324 March18.22.2×

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 Poland and Slovakia

Number 26 of 30 episodes in Poland and Slovakia since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 30.

Use this page

SmogRank, Poland, March 2026: 9 cities with PM2.5 at twice their usual or more, 25 March 2026, smogrank.com/episodes/2026-03-poland-2 (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.