SmogRank / Cleaner or dirtier / Slovenia

Slovenia: cleaner or dirtier, 2026

In Slovenia, 12 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 0 got dirtier and 12 cleaner.

The 12 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	KranjUrban Municipality of Kranj, Slovenia	60	52	−3.8 µg/m³−28%
2	CeljeUrban Municipality of Celje, Slovenia	61	55	−3.5 µg/m³−24%
3	Zagorje ob SaviMunicipality of Zagorje ob Savi, Slovenia	59	53	−3.0 µg/m³−23%
4	TrbovljeMunicipality of Trbovlje, Slovenia	56	49	−2.7 µg/m³−23%
5	KoperUrban Municipality of Koper, Slovenia	53	43	−2.5 µg/m³−24%
6	MariborUrban Municipality of Maribor, Slovenia	57	52	−2.3 µg/m³−19%
7	Nova GoricaUrban Municipality of Nova Gorica, Slovenia	56	52	−2.2 µg/m³−19%
8	LjubljanaSlovenia	57	53	−2.0 µg/m³−16%
9	Novo MestoUrban Municipality of Novo Mesto, Slovenia	58	54	−2.0 µg/m³−16%
10	Murska SobotaUrban Municipality of Murska Sobota, Slovenia	61	57	−2.0 µg/m³−14%
11	KostelMunicipality of Kostel, Slovenia	41	33	−1.3 µg/m³−18%
12	PtujUrban Municipality of Ptuj, Slovenia	59	57	−1.2 µg/m³−9%

Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.