SmogRank / Cleaner or dirtier / Belgium

Belgium: cleaner or dirtier, 2026

In Belgium, 45 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 2 got dirtier and 43 cleaner.

The 2 cities that got dirtier, biggest rise first

#	City	2025	2026	Change
1	LiègeWallonia, Belgium	38	41	+0.4 µg/m³+6%
2	VielsalmWallonia, Belgium	23	25	+0.3 µg/m³+7%

The 43 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	MenenFlanders, Belgium	57	48	−3.7 µg/m³−30%
2	RixensartWallonia, Belgium	52	33	−3.6 µg/m³−37%
3	RoeselareFlanders, Belgium	58	51	−3.5 µg/m³−28%
4	KortrijkFlanders, Belgium	55	46	−3.2 µg/m³−28%
5	StabroekFlanders, Belgium	55	45	−3.1 µg/m³−28%
6	LochristiFlanders, Belgium	57	52	−2.9 µg/m³−24%
7	ZaventemFlanders, Belgium	53	43	−2.6 µg/m³−25%
8	TournaiWallonia, Belgium	45	31	−2.6 µg/m³−32%
9	GrimbergenFlanders, Belgium	55	49	−2.6 µg/m³−23%
10	MonsWallonia, Belgium	52	39	−2.5 µg/m³−26%
11	VeurneFlanders, Belgium	55	48	−2.3 µg/m³−21%
12	KoksijdeFlanders, Belgium	55	48	−2.3 µg/m³−21%
13	GentFlanders, Belgium	54	48	−2.2 µg/m³−20%
14	MeulebekeFlanders, Belgium	58	54	−2.2 µg/m³−17%
15	IzegemFlanders, Belgium	58	54	−2.2 µg/m³−17%
16	ZelzateFlanders, Belgium	56	52	−2.2 µg/m³−19%
17	AarschotFlanders, Belgium	52	42	−2.0 µg/m³−21%
18	BeverenFlanders, Belgium	54	48	−2.0 µg/m³−19%
19	AntwerpFlanders, Belgium	54	49	−2.0 µg/m³−19%
20	DammeFlanders, Belgium	55	51	−2.0 µg/m³−18%
21	MaldegemFlanders, Belgium	55	51	−2.0 µg/m³−18%
22	ZwijndrechtFlanders, Belgium	54	50	−1.9 µg/m³−17%
23	MolFlanders, Belgium	52	45	−1.7 µg/m³−17%
24	BrusselsBrussels Capital, Belgium	51	41	−1.7 µg/m³−19%
25	MechelenFlanders, Belgium	53	47	−1.6 µg/m³−16%
26	CharleroiWallonia, Belgium	41	33	−1.5 µg/m³−20%
27	KapellenFlanders, Belgium	53	47	−1.5 µg/m³−15%
28	MelseleFlanders, Belgium	53	50	−1.4 µg/m³−13%
29	ChampionWallonia, Belgium	37	30	−1.3 µg/m³−19%
30	AndenneWallonia, Belgium	37	30	−1.3 µg/m³−19%
31	HasseltFlanders, Belgium	52	47	−1.3 µg/m³−13%
32	GingelomFlanders, Belgium	49	43	−1.2 µg/m³−13%
33	Habay-la-VieilleWallonia, Belgium	27	21	−1.1 µg/m³−23%
34	Flémalle-HauteWallonia, Belgium	41	34	−1.1 µg/m³−15%
35	WillebroekFlanders, Belgium	52	47	−1.1 µg/m³−12%
36	HouthalenFlanders, Belgium	53	51	−1.1 µg/m³−11%
37	CouvinWallonia, Belgium	28	24	−0.7 µg/m³−14%
38	NamurWallonia, Belgium	35	31	−0.7 µg/m³−11%
39	EupenWallonia, Belgium	29	26	−0.6 µg/m³−11%
40	BastogneWallonia, Belgium	26	24	−0.3 µg/m³−7%
41	BertrixWallonia, Belgium	24	23	−0.2 µg/m³−5%
42	HamoisWallonia, Belgium	28	27	−0.2 µg/m³−4%
43	Marche-en-FamenneWallonia, Belgium	28	27	−0.2 µg/m³−4%

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.