SmogRank / Cleaner or dirtier / Slovakia

Slovakia: cleaner or dirtier, 2026

In Slovakia, 38 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 24 got dirtier and 13 cleaner.

The 24 cities that got dirtier, biggest rise first

#	City	2025	2026	Change
1	PúchovTrenčín Region, Slovakia	53	56	+1.7 µg/m³+17%
2	Vranov nad TopľouPrešov Region, Slovakia	52	55	+1.6 µg/m³+16%
3	NitraNitra Region, Slovakia	51	54	+1.6 µg/m³+17%
4	SenecBratislava Region, Slovakia	49	53	+1.6 µg/m³+18%
5	TrebišovKošice Region, Slovakia	54	56	+1.3 µg/m³+12%
6	Veľká LomnicaPrešov Region, Slovakia	40	47	+1.3 µg/m³+18%
7	KomárnoNitra Region, Slovakia	52	54	+1.3 µg/m³+14%
8	MalackyBratislava Region, Slovakia	51	53	+1.2 µg/m³+13%
9	SninaPrešov Region, Slovakia	51	54	+1.2 µg/m³+13%
10	HumennéPrešov Region, Slovakia	55	56	+0.8 µg/m³+7%
11	KošiceKošice Region, Slovakia	54	55	+0.8 µg/m³+7%
12	RužomberokŽilina Region, Slovakia	53	54	+0.8 µg/m³+8%
13	PrievidzaTrenčín Region, Slovakia	48	52	+0.8 µg/m³+9%
14	PopradPrešov Region, Slovakia	52	53	+0.7 µg/m³+7%
15	SenicaTrnava Region, Slovakia	52	53	+0.7 µg/m³+7%
16	SereďTrnava Region, Slovakia	51	53	+0.7 µg/m³+8%
17	TrnavaTrnava Region, Slovakia	52	53	+0.6 µg/m³+6%
18	ČaňaKošice Region, Slovakia	61	62	+0.4 µg/m³+3%
19	Chorvátsky Grob - Čierna VodaBratislava Region, Slovakia	50	52	+0.4 µg/m³+4%
20	Devínska Nová VesBratislava Region, Slovakia	52	52	+0.2 µg/m³+2%
21	Liptovský Mikulᚎilina Region, Slovakia	52	52	+0.2 µg/m³+2%
22	ZvolenBanská Bystrica Region, Slovakia	52	53	+0.2 µg/m³+2%
23	BardejovPrešov Region, Slovakia	54	54	+0.1 µg/m³+1%
24	HnúšťaBanská Bystrica Region, Slovakia	48	48	+0.1 µg/m³+1%

The 13 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	ŠahyNitra Region, Slovakia	55	51	−1.9 µg/m³−17%
2	RevúcaBanská Bystrica Region, Slovakia	54	51	−1.7 µg/m³−16%
3	Banská BystricaBanská Bystrica Region, Slovakia	44	35	−1.7 µg/m³−21%
4	LučenecBanská Bystrica Region, Slovakia	55	53	−1.2 µg/m³−10%
5	PezinokBratislava Region, Slovakia	53	52	−1.0 µg/m³−10%
6	OščadnicaŽilina Region, Slovakia	53	52	−0.7 µg/m³−7%
7	ČadcaŽilina Region, Slovakia	53	52	−0.7 µg/m³−7%
8	PartizánskeTrenčín Region, Slovakia	50	46	−0.7 µg/m³−8%
9	BratislavaBratislava Region, Slovakia	52	50	−0.7 µg/m³−7%
10	ŽarnovicaBanská Bystrica Region, Slovakia	54	53	−0.5 µg/m³−5%
11	MartinŽilina Region, Slovakia	55	54	−0.5 µg/m³−5%
12	Žiar nad HronomBanská Bystrica Region, Slovakia	48	46	−0.3 µg/m³−3%
13	ŽilinaŽilina Region, Slovakia	54	53	−0.2 µg/m³−2%

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.