SmogRank / Episodes / Poland

Poland and Latvia, February 2026

For 1 day, on 28 February 2026, 9 cities in Poland and Latvia had PM2.5 at least twice their usual for the time of year. The worst reading was Suwałki, Podlasie, Poland: 43.9 µg/m³ on 28 February, about 3.0× its usual 14.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached9in 2 countries
Days128 February 2026
Worst day28 February9 cities counted
Furthest above usual3.0×Riga

Day by day

28 February 9 cities at twice their usual or more
KaunasOlsztynElblągGdyniaVisbyKalmarKołobrzegAugustówGdańskKościerzynaEłkLiepājaRēzekneSuwałkiRigaVentspils
25 Feb2627281 Mar23
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

VentspilsVentspils, 25 February: 19.7 µg/m³, 1.5× usualVentspils, 26 February: 15.3 µg/m³, 1.2× usualVentspils, 27 February: 28.5 µg/m³, 2.2× usualVentspils, 28 February: 38.6 µg/m³, 3.0× usualVentspils, 1 March: 15.7 µg/m³, 1.2× usualVentspils, 2 March: 9.4 µg/m³, 0.7× usualVentspils, 3 March: 16.0 µg/m³, 1.2× usualSuwałkiSuwałki, 25 February: 6.5 µg/m³, 0.4× usualSuwałki, 26 February: 17.5 µg/m³, 1.2× usualSuwałki, 27 February: 28.0 µg/m³, 1.9× usualSuwałki, 28 February: 43.9 µg/m³, 3.0× usualSuwałki, 1 March: 31.9 µg/m³, 2.2× usualSuwałki, 2 March: 12.9 µg/m³, 0.9× usualSuwałki, 3 March: 19.0 µg/m³, 1.3× usualAugustówAugustów, 25 February: 7.2 µg/m³, 0.3× usualAugustów, 26 February: 22.7 µg/m³, 1.1× usualAugustów, 27 February: 34.0 µg/m³, 1.6× usualAugustów, 28 February: 43.9 µg/m³, 2.1× usualAugustów, 1 March: 39.7 µg/m³, 1.9× usualAugustów, 2 March: 23.3 µg/m³, 1.1× usualAugustów, 3 March: 32.6 µg/m³, 1.5× usualLiepājaLiepāja, 25 February: 20.1 µg/m³, 1.2× usualLiepāja, 26 February: 18.6 µg/m³, 1.1× usualLiepāja, 27 February: 31.9 µg/m³, 1.8× usualLiepāja, 28 February: 43.5 µg/m³, 2.5× usualLiepāja, 1 March: 23.7 µg/m³, 1.4× usualLiepāja, 2 March: 16.6 µg/m³, 1.0× usualLiepāja, 3 March: 23.9 µg/m³, 1.4× usualKościerzynaKościerzyna, 25 February: 12.8 µg/m³, 0.7× usualKościerzyna, 26 February: 15.8 µg/m³, 0.8× usualKościerzyna, 27 February: 33.4 µg/m³, 1.7× usualKościerzyna, 28 February: 42.7 µg/m³, 2.2× usualKościerzyna, 1 March: 26.8 µg/m³, 1.4× usualKościerzyna, 2 March: 18.6 µg/m³, 1.0× usualKościerzyna, 3 March: 34.5 µg/m³, 1.8× usualRēzekneRēzekne, 25 February: 19.0 µg/m³, 1.3× usualRēzekne, 26 February: 25.5 µg/m³, 1.8× usualRēzekne, 27 February: 15.4 µg/m³, 1.1× usualRēzekne, 28 February: 39.6 µg/m³, 2.7× usualRēzekne, 1 March: 30.7 µg/m³, 2.1× usualRēzekne, 2 March: 9.5 µg/m³, 0.7× usualRēzekne, 3 March: 6.7 µg/m³, 0.5× usualGdańskGdańsk, 25 February: 11.8 µg/m³, 0.7× usualGdańsk, 26 February: 23.7 µg/m³, 1.4× usualGdańsk, 27 February: 32.6 µg/m³, 1.9× usualGdańsk, 28 February: 38.1 µg/m³, 2.2× usualGdańsk, 1 March: 20.1 µg/m³, 1.2× usualGdańsk, 2 March: 14.1 µg/m³, 0.8× usualGdańsk, 3 March: 22.7 µg/m³, 1.3× usualEłkEłk, 25 February: 8.5 µg/m³, 0.5× usualEłk, 26 February: 16.8 µg/m³, 1.0× usualEłk, 27 February: 24.9 µg/m³, 1.5× usualEłk, 28 February: 38.0 µg/m³, 2.3× usualEłk, 1 March: 27.8 µg/m³, 1.7× usualEłk, 2 March: 12.6 µg/m³, 0.8× usualEłk, 3 March: 21.9 µg/m³, 1.3× usualRigaRiga, 25 February: 13.9 µg/m³, 1.2× usualRiga, 26 February: 18.4 µg/m³, 1.5× usualRiga, 27 February: 20.4 µg/m³, 1.7× usualRiga, 28 February: 36.2 µg/m³, 3.0× usualRiga, 1 March: 25.1 µg/m³, 2.1× usualRiga, 2 March: 4.5 µg/m³, 0.4× usualRiga, 3 March: 6.0 µg/m³, 0.5× usual25 Feb2627281 Mar23
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
RigaRiga, Latvia1 36.228 February11.93.0×
VentspilsVentspils, Latvia1 38.628 February12.93.0×
SuwałkiPodlasie, Poland1 43.928 February14.73.0×
RēzekneRēzekne, Latvia1 39.628 February14.52.7×
LiepājaLiepaja, Latvia1 43.528 February17.42.5×
EłkWarmia-Masuria, Poland1 38.028 February16.62.3×
GdańskPomerania, Poland1 38.128 February17.02.2×
KościerzynaPomerania, Poland1 42.728 February19.22.2×
AugustówPodlasie, Poland1 43.928 February21.12.1×

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 Latvia

Number 21 of 22 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 22.

Use this page

SmogRank, Poland and Latvia, February 2026: 9 cities with PM2.5 at twice their usual or more, 28 February 2026, smogrank.com/episodes/2026-02-poland-and-latvia (accessed 2 October 2026).

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.