SmogRank / Episodes / Romania

Romania, Bulgaria and Serbia, January 2025

For 2 days, from 29 to 30 January 2025, 8 cities in Romania, Bulgaria and Serbia had PM2.5 at least twice their usual for the time of year. The worst reading was Negotin, Central Serbia, Serbia: 144.0 µg/m³ on 30 January, about 2.2× its usual 66.2. Ended 30 January.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached8in 3 countries
Days229 to 30 January 2025
Worst day30 January5 cities counted
Furthest above usual4.4×Jilava

Day by day

30 January 5 cities at twice their usual or more
BaloteştiCraiovaCluj-NapocaDejBorPirotVarnaNišParaćinĆuprijaNyíregyházaSmederevoKragujevacPančevoVinčaRipanjBelgradeFilmski GradZemunKraljevoSremčicaSurčinLazarevacObrenovacSzegedČačakNovi PazarNovi SadValjevoFutogUžiceGyöngyösBucharestNegotinBragadiruRuseCodleaHolbocaIaşiJilava
26 Jan27282930311 Feb2
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

JilavaJilava, 26 January: 62.1 µg/m³Jilava, 27 January: 53.5 µg/m³Jilava, 28 January: 75.8 µg/m³Jilava, 29 January: 68.4 µg/m³, 4.4× its usual 15.5Jilava, 30 January: no readingJilava, 31 January: 46.0 µg/m³Jilava, 1 February: 41.2 µg/m³Jilava, 2 February: 36.5 µg/m³BragadiruBragadiru, 26 January: 47.0 µg/m³Bragadiru, 27 January: 36.8 µg/m³Bragadiru, 28 January: 46.8 µg/m³Bragadiru, 29 January: 55.2 µg/m³, 2.3× its usual 24.2Bragadiru, 30 January: 48.7 µg/m³Bragadiru, 31 January: 15.5 µg/m³Bragadiru, 1 February: 18.1 µg/m³Bragadiru, 2 February: 17.2 µg/m³BucharestBucharest, 26 January: 42.5 µg/m³Bucharest, 27 January: 26.1 µg/m³Bucharest, 28 January: 35.0 µg/m³Bucharest, 29 January: 42.2 µg/m³, 2.2× its usual 19.6Bucharest, 30 January: 35.3 µg/m³Bucharest, 31 January: 11.3 µg/m³Bucharest, 1 February: 14.5 µg/m³Bucharest, 2 February: 13.4 µg/m³RuseRuse, 26 January: 26.0 µg/m³Ruse, 27 January: 29.9 µg/m³Ruse, 28 January: 45.3 µg/m³Ruse, 29 January: 39.5 µg/m³, 2.4× its usual 16.2Ruse, 30 January: 36.6 µg/m³, 2.2× its usual 16.4Ruse, 31 January: 21.3 µg/m³Ruse, 1 February: no readingRuse, 2 February: 16.9 µg/m³NegotinNegotin, 26 January: no readingNegotin, 27 January: no readingNegotin, 28 January: no readingNegotin, 29 January: no readingNegotin, 30 January: 144.0 µg/m³, 2.2× its usual 66.2Negotin, 31 January: 127.0 µg/m³Negotin, 1 February: 36.8 µg/m³Negotin, 2 February: 50.8 µg/m³CodleaCodlea, 26 January: 55.1 µg/m³Codlea, 27 January: 70.4 µg/m³Codlea, 28 January: 45.4 µg/m³Codlea, 29 January: 41.7 µg/m³Codlea, 30 January: 60.9 µg/m³, 2.4× its usual 25.1Codlea, 31 January: 75.3 µg/m³Codlea, 1 February: 25.9 µg/m³Codlea, 2 February: 42.5 µg/m³IaşiIaşi, 26 January: 11.6 µg/m³Iaşi, 27 January: 17.5 µg/m³Iaşi, 28 January: 28.2 µg/m³Iaşi, 29 January: 27.7 µg/m³Iaşi, 30 January: 50.4 µg/m³, 2.8× its usual 18.0Iaşi, 31 January: 13.8 µg/m³Iaşi, 1 February: 19.3 µg/m³Iaşi, 2 February: 17.6 µg/m³HolbocaHolboca, 26 January: 12.6 µg/m³Holboca, 27 January: 20.7 µg/m³Holboca, 28 January: 26.8 µg/m³Holboca, 29 January: 25.5 µg/m³Holboca, 30 January: 44.7 µg/m³, 2.7× its usual 16.8Holboca, 31 January: 18.4 µg/m³Holboca, 1 February: 17.8 µg/m³Holboca, 2 February: 18.5 µg/m³26 Jan27282930311 Feb2
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
JilavaIlfov, Romania1 68.429 January15.54.4×
IaşiIași County, Romania1 50.430 January18.02.8×
HolbocaIași County, Romania1 44.730 January16.82.7×
CodleaBrașov County, Romania1 60.930 January25.12.4×
RuseRuse, Bulgaria2 39.529 January16.22.4×
BragadiruIlfov, Romania1 55.229 January24.22.3×
NegotinCentral Serbia, Serbia1 144.030 January66.22.2×
BucharestBucharest, Romania1 42.229 January19.62.2×

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 Romania and Bulgaria

Number 7 of 7 episodes in Romania and Bulgaria since our records began, by cities reached.

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

Use this page

SmogRank, Romania, Bulgaria and Serbia, January 2025: 8 cities with PM2.5 at twice their usual or more, 29 to 30 January 2025, smogrank.com/episodes/2025-01-romania-bulgaria-and-serbia (accessed 5 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.