SmogRank / Episodes / Poland

Poland, Latvia and Lithuania, October 2025

For 2 days, from 8 to 9 October 2025, 14 cities in Poland, Latvia and Lithuania had PM2.5 at least twice their usual for the time of year. The worst reading was Augustów, Podlasie, Poland: 49.1 µg/m³ on 8 October, about 4.6× its usual 10.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached14in 3 countries
Days28 to 9 October 2025
Worst day8 October13 cities counted
Furthest above usual4.6×Augustów

Day by day

8 October 13 cities at twice their usual or more
SuwałkiGiżyckoOtwockKonstancin-JeziornaWarsawLublinCiechanówPruszkówOlsztynŻyrardówZamośćSkarżysko-KamiennaKlaipėdaTomaszów LubelskiVilniusPłockMielecJarosławRzeszówElblągPrzemyślKutnoŁódźLiepājaTarnówWłocławekKrosnoJasłoRigaRadomskoŁaskToruńGdańskKrakówŚwiecieGdyniaBydgoszczKatowiceKościerzynaCzechowice-DziedziceŻywiecBielsko-BialaBytówJastrzębie ZdrójKędzierzyn-KoźleOpoleKrotoszynRacibórzBrzegPoznańWrocławHraniceOlomoucKłodzkoKalmarKaliszNiskoLegionowoDębicaWawerKielceRadomBiałystokStarachowiceEłkKaunasRēzekneSiedlceAugustów
5 Oct6789101112
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

AugustówAugustów, 5 October: 16.2 µg/m³Augustów, 6 October: 15.2 µg/m³Augustów, 7 October: 15.5 µg/m³Augustów, 8 October: 49.1 µg/m³, 4.6× its usual 10.7Augustów, 9 October: 36.6 µg/m³, 3.4× its usual 10.8Augustów, 10 October: 7.5 µg/m³Augustów, 11 October: 12.4 µg/m³Augustów, 12 October: 6.4 µg/m³SiedlceSiedlce, 5 October: 10.1 µg/m³Siedlce, 6 October: 11.6 µg/m³Siedlce, 7 October: 29.6 µg/m³Siedlce, 8 October: 34.9 µg/m³, 3.2× its usual 10.8Siedlce, 9 October: 37.5 µg/m³, 3.4× its usual 11.1Siedlce, 10 October: no readingSiedlce, 11 October: no readingSiedlce, 12 October: no readingRadomRadom, 5 October: 10.0 µg/m³Radom, 6 October: 10.5 µg/m³Radom, 7 October: 22.4 µg/m³Radom, 8 October: 32.9 µg/m³, 2.6× its usual 12.7Radom, 9 October: 26.8 µg/m³, 2.1× its usual 12.7Radom, 10 October: 11.5 µg/m³Radom, 11 October: 9.5 µg/m³Radom, 12 October: 9.6 µg/m³StarachowiceStarachowice, 5 October: 10.2 µg/m³Starachowice, 6 October: 11.6 µg/m³Starachowice, 7 October: 15.2 µg/m³Starachowice, 8 October: 31.3 µg/m³, 2.7× its usual 11.7Starachowice, 9 October: 26.4 µg/m³, 2.2× its usual 11.8Starachowice, 10 October: 9.3 µg/m³Starachowice, 11 October: 7.2 µg/m³Starachowice, 12 October: 6.7 µg/m³RēzekneRēzekne, 5 October: 15.0 µg/m³Rēzekne, 6 October: no readingRēzekne, 7 October: no readingRēzekne, 8 October: 28.3 µg/m³, 3.4× its usual 8.4Rēzekne, 9 October: 15.7 µg/m³Rēzekne, 10 October: 5.8 µg/m³Rēzekne, 11 October: 5.1 µg/m³Rēzekne, 12 October: 3.7 µg/m³KielceKielce, 5 October: 9.4 µg/m³Kielce, 6 October: 9.8 µg/m³Kielce, 7 October: 10.6 µg/m³Kielce, 8 October: 28.0 µg/m³, 2.4× its usual 11.5Kielce, 9 October: 29.7 µg/m³, 2.6× its usual 11.5Kielce, 10 October: 9.0 µg/m³Kielce, 11 October: 6.9 µg/m³Kielce, 12 October: 8.1 µg/m³KaliszKalisz, 5 October: 8.3 µg/m³Kalisz, 6 October: 8.3 µg/m³Kalisz, 7 October: 13.3 µg/m³Kalisz, 8 October: 28.0 µg/m³, 2.1× its usual 13.6Kalisz, 9 October: 13.1 µg/m³Kalisz, 10 October: 10.2 µg/m³Kalisz, 11 October: 10.8 µg/m³Kalisz, 12 October: 10.1 µg/m³KaunasKaunas, 5 October: 15.2 µg/m³Kaunas, 6 October: no readingKaunas, 7 October: 15.2 µg/m³Kaunas, 8 October: 27.6 µg/m³, 3.4× its usual 8.1Kaunas, 9 October: 17.2 µg/m³Kaunas, 10 October: 6.0 µg/m³Kaunas, 11 October: 5.0 µg/m³Kaunas, 12 October: 4.6 µg/m³EłkEłk, 5 October: 9.5 µg/m³Ełk, 6 October: 11.8 µg/m³Ełk, 7 October: 23.9 µg/m³Ełk, 8 October: 26.9 µg/m³, 3.1× its usual 8.8Ełk, 9 October: 18.5 µg/m³Ełk, 10 October: 3.9 µg/m³Ełk, 11 October: 5.8 µg/m³Ełk, 12 October: 3.2 µg/m³DębicaDębica, 5 October: 8.6 µg/m³Dębica, 6 October: 10.1 µg/m³Dębica, 7 October: 10.7 µg/m³Dębica, 8 October: 26.7 µg/m³, 2.3× its usual 11.5Dębica, 9 October: 23.1 µg/m³Dębica, 10 October: 9.5 µg/m³Dębica, 11 October: 7.9 µg/m³Dębica, 12 October: 10.1 µg/m³LegionowoLegionowo, 5 October: 8.4 µg/m³Legionowo, 6 October: 7.3 µg/m³Legionowo, 7 October: 13.2 µg/m³Legionowo, 8 October: 26.3 µg/m³, 2.3× its usual 11.3Legionowo, 9 October: 19.6 µg/m³Legionowo, 10 October: 8.4 µg/m³Legionowo, 11 October: 6.9 µg/m³Legionowo, 12 October: 5.7 µg/m³NiskoNisko, 5 October: 14.2 µg/m³Nisko, 6 October: 15.7 µg/m³Nisko, 7 October: 23.8 µg/m³Nisko, 8 October: 25.7 µg/m³, 2.2× its usual 11.8Nisko, 9 October: 24.8 µg/m³Nisko, 10 October: 10.7 µg/m³Nisko, 11 October: 8.1 µg/m³Nisko, 12 October: 7.4 µg/m³WawerWawer, 5 October: 10.3 µg/m³Wawer, 6 October: 10.1 µg/m³Wawer, 7 October: 13.6 µg/m³Wawer, 8 October: 25.2 µg/m³, 2.5× its usual 10.1Wawer, 9 October: 25.1 µg/m³, 2.4× its usual 10.5Wawer, 10 October: 8.6 µg/m³Wawer, 11 October: 8.4 µg/m³Wawer, 12 October: 7.5 µg/m³BiałystokBiałystok, 5 October: 10.0 µg/m³Białystok, 6 October: 8.7 µg/m³Białystok, 7 October: 15.0 µg/m³Białystok, 8 October: 23.5 µg/m³Białystok, 9 October: 29.0 µg/m³, 2.7× its usual 10.8Białystok, 10 October: 5.3 µg/m³Białystok, 11 October: 7.3 µg/m³Białystok, 12 October: 4.6 µg/m³5 Oct6789101112
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
AugustówPodlasie, Poland2 49.18 October10.74.6×
SiedlceMazovia, Poland2 37.59 October11.13.4×
RēzekneRēzekne, Latvia1 28.38 October8.43.4×
KaunasKaunas, Lithuania1 27.68 October8.13.4×
EłkWarmia-Masuria, Poland1 26.98 October8.83.1×
StarachowiceŚwiętokrzyskie, Poland2 31.38 October11.72.7×
BiałystokPodlasie, Poland1 29.09 October10.82.7×
RadomMazovia, Poland2 32.98 October12.72.6×
KielceŚwiętokrzyskie, Poland2 29.79 October11.52.6×
WawerMazovia, Poland2 25.28 October10.12.5×
DębicaSubcarpathia, Poland1 26.78 October11.52.3×
LegionowoMazovia, Poland1 26.38 October11.32.3×
NiskoSubcarpathia, Poland1 25.78 October11.82.2×
KaliszGreater Poland, Poland1 28.08 October13.62.1×

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 Poland and Latvia

Number 27 of 36 episodes in Poland and Latvia since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 36.

Use this page

SmogRank, Poland, Latvia and Lithuania, October 2025: 14 cities with PM2.5 at twice their usual or more, 8 to 9 October 2025, smogrank.com/episodes/2025-10-poland-latvia-and-lithuania (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.