info:
The annual mean NO₂ concentrations are published in the table below. The annual mean is the average of all hourly mean concentrations in a calendar year (1/1 till 31/12).
According to EC directive 2008/50/EC the annual limit value of 40 μg/m³ may not be exceeded from 01/01/2010.
The measuring stations are put in decreasing order by the running annual mean^(info) during the present year. The data from the previous years are posted as additional information.

nr	stacode	city	region	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024 (*)
1	41REG1	Brussel (Regentlaan)	Bru																	NA	40	35	33
2	41B001	Brussel (Kunst-Wet)	Bru												NA	56	56	52	36	38	36	31	31
3	42R804	Borgerhout (Ring)	Fla												NA	54	48	43	34	37	34	30	30
4	40AT44	Antwerpen (Ordamstraat)	Fla														36	36	33	31	32	27	30
5	42R806	Antwerpen (Maerlant)	Fla																NA	46	39	29	29
6	41BUL1	Brussel (Zuidlaan)	Bru																		29	29	28
7	40R822	Antwerpen (haven)	Fla	44	44	44	41	40	40	41	39	39	39	37	38	38	38	35	29	31	33	30	28
8	40AT83	Berendrecht	Fla																	NA	27	25	27
9	40R891	Antwerpen (haven)	Fla	43	43	40	43	39	40	40	38	37	36	36	36	35	32	32	29	30	28	24	25
10	42R802	Borgerhout (straatkant)	Fla							48	50	49	47	45	45	42	40	36	27	29	29	25	25
11	41VBX3	Brussel (Lakensestraat)	Bru																		NA	24	24
12	42DU07	Antwerpen (Deurne)	Fla																		26	23	24
13	42R805	Antwerpen (Belgiëlei)	Fla											NA	43	40	40	35	26	28	29	24	24
14	42MK02	Antwerpen (Merksem)	Fla																			22	24
15	41R002	Elsene	Bru	58	54	54	54	52	54	50	48	49	47	45	48	49	42(**)	33	27	31	27	23	23
16	41VBX2	Brussel (Huidevetterstraat)	Bru																		NA	23	22
17	40R892	Kallo (sluis Kallo)	Fla	35	35	36	40	38	39	37	33	38	34	34	34	32	34	31	27	28	27	22	22
18	42M802	Antwerpen (Luchtbal)	Fla	46	44	44	45	43	44	43	41	40	38	36	35	35	32	30	24	25	25	22	22
19	41B008	Brussel (Belliardstraat)	Bru								NA	63	61	62	54	NA	NA	49	36	32	29	25	22
20	40R897	Antwerpen (haven)	Fla	40	37	38	39	36	35	36	35	37	35	34	34	32	33	30	25	27	26	22	22
21	42R801	Borgerhout	Fla	47	46	45	45	45	44	46	45	43	41	38	39	36	34	32	24	26	25	21	21
22	42R842	Mechelen (Hendrik Speecqvest)	Fla																NA	28	25	21	21
23	41CHA1	Ganshoren (Keizer-Karel)	Bru																	NA	32	25	21
24	41VBX1	Brussel (Groot Eiland)	Bru																		NA	21	21
25	40SA08	Stabroek	Fla																NA	21	21	19	20
26	42R803	Antwerpen (Park Spoor Noord)	Fla											NA	32	31	32	28	22	24	24	20	20
27	41N043	Voorhaven (Haren)	Bru	46	45	45	46	47	44	44	43	42	42	42	42	39	37	34	26	26	26	22	20
28	41R001	Sint-Jans-Molenbeek	Bru	47	47	46	44	43	43	41	41	42	39	35	38	33	35	31	24	27	25	21	20
29	41B004	Brussel (Sint-Katelijne)	Bru	43	NA		41	43	43	40	38	36	34	31	33	35	34	28	23	25	23	20	20
30	42R831	Berendrecht	Fla		33	34	34	34	34	32	32	31	31	30	28	28	26	24	20	22	22	19	19
31	44R702	Gent (Gustaaf Callierlaan)	Fla									39	39	38	39	36	34	30	22	25	24	20	19
32	42R830	Doel (Scheldemolenstraat)	Fla	30	30	27	27	28	28	27	26	27	27	25	26	24	27	24	21	22	23	19	19
33	43R202	Liège (Av M Destenay)	Wal																	22	22	18	19
34	40SA04	Hoevenen	Fla									NA	27	27	27	NA							NA
35	45R503	Charleroi - Parc	Wal																	NA	25	19	17
36	41B006	Brussel (EU Parlement)	Bru	38	38	40	38	38	37	33	34	37	32	31	NA		NA	25	19	25	25	19	17
37	42R818	Antwerpen (Burchtse Weel)	Fla														NA	31	23	25	21	18	17
38	44R750	Zelzate	Fla	32	32	31	31	30	31	30	29	29	27	27	26	26	26	25	21	21	20	18	17
39	42R817	Antwerpen (Groenenborgerlaan)	Fla											NA	32	30	28	26	20	22	20	17	16
40	42R020	Vilvoorde	Fla	37	37	35	35	35	34	32	31	30	30	28	28	27	25	23	19	20	19	16	16
41	45R501	Charleroi	Wal	42	42	41	37	38	37	36	35	36	32	31	31	28	28	25	20	23	22	18	16
42	44R701	Gent (Baudelopark)	Fla	36	36	34	34	34	35	33	31	32	29	28	29	27	26	24	20	21	21	17	16
43	41MEU1	Neder-Over-Heembeek	Bru	32	31	32	35	34	35	NA	31	32	28	26	27	27	28	28	18	21	18	17	16
44	40SZ01	Steenokkerzeel	Fla	32	32	35	33	31	31	30	30	28	25	26	26	26	24	22	17	17	17	16	16
45	44R740	Sint-Kruiswinkel	Fla	30	30	30	28	28	29	27	26	26	23	23	24	23	22	21	17	18	18	16	15
46	40AL01	Antwerpen-Linkeroever	Fla									NA	26	26	27	26	26	24	19	22	20	16	15
47	44R721	Wondelgem	Fla	31	32	30	29	29	31	29	26	27	25	23	24	22	23	21	17	19	20	16	NA
48	42R811	Schoten	Fla	35	34	35	33	33	34	31	31	29	28	26	26	27	24	21	17	18	18	16	15
49	43N070	Mons	Wal	32	27	33	29	31	31	31	30	29	28	27	27	30	26	23	16	18	18	15	15
50	45R502	Lodelinsart	Wal	33	34	34	31	30	29	28	27	27	25	25	27	25	23	22	17	20	19	15	15
51	48R236	Liége (Aéroport 2)	Wal																				NA
52	43R223	Jemeppe-sur-Meuse	Wal	35	36	34	32	33	32	30	29	28	25	25	26	25	24	22	19	19	18	15	14
53	44M705	Roeselare (Haven)	Fla	26	27	26	26	28	28	27	25	26	24	23	24	23	24	21	17	18	19	15	14
54	42R820	Kapellen	Fla								NA	23	22	22	21	22	17	18	14	14	14	14	14
55	43R221	Herstal	Wal									29	26	25	27	25	26	22	18	19	19	16	14
56	44R731	Evergem	Fla	29	30	28	28	28	30	28	27	27	26	25	25	24	24	22	17	18	18	15	14
57	48R235	Bierset	Wal																	20	18	14	NA
58	40SZ05	Steenokkerzeel	Fla																	15	14	13	13
59	41F013		Fla																				13
60	48R516	Charleroi (Aeroport 2)	Wal																		16	13	12
61	42N047	Hasselt	Fla															NA	15	16	16	13	12
62	41B011	Sint-Agatha-Berchem	Bru	32	29	31	28	28	30	28	27	27	23	22	22	23	21	18	12	14	14	13	12
63	45R512	Marchienne-Au-Pont	Wal	31	31	30	27	27	27	26	24	24	23	23	23	23	22	22	17	18	16	13	12
64	43R401	Namur	Wal															24	17	NA	NA	13	12
65	44R710	Destelbergen	Fla	25	25	28	NA	27	28	26	24	24	22	22	22	21	20	18	14	15	14	12	11
66	44N052	Zwevegem	Fla	26	27	27	25	25	26	26	30	28	25	23	26	20	19	17	13	15	14	12	11
67	43R222	Liège (ISSeP)	Wal	34	33	32	31	29	31	30	28	28	24	24	25	23	25	21	15	17	16	13	11
68	43R240	Engis	Wal	27	29	28	26	24	24	23	22	21	18	18	19	20	20	18	15	15	16	12	11
69	48R237	Liège (Aéroport 1)	Wal																			NA	11
70	40LD02	Geel	Fla	26	27	25	24	23	25	24	24	23	21	20	21	21	19	18	14	14	14	11	11
71	41R012	Ukkel	Bru	27	30	29	27	28	28	26	25	26	21	22	21	20	18	16	10	12	11	11	10
72	42N016	Dessel	Fla	24	24	23	22	22	23	21	20	20	18	17	18	19	17	16	13	13	13	10	10
73	48R215	Hermalle	Wal																	15	16	12	10
74	48R515	Charleroi (Aeroport 1)	Wal																		14	11	10
75	42N035	Aarschot	Fla	22	NA	24	22	22	22	21	23	22	19	19	20	19	17	16	12	13	11	10	9
76	44N012	Moerkerke	Fla	19	20	18	18	19	19	18	15	16	14	13	15	15	14	14	11	11	11	9	8
77	42N027	Bree	Fla				NA	21	22	20	19	18	16	15	16	16	16	14	11	11	11	9	8
78	43N060	Havinnes	Wal							14	16	16	14	15	14	14	13	12	10	10	10	8	8
79	42N040	Sint-Pieters-Leeuw	Fla	18	18	NA	18	19	22	20	18	19	16	15	15	15	15	13	9	10	10	8	8
80	42N046	Gellik	Fla	23	23	23	21	22	23	21	22	21	18	17	19	18	18	16	13	13	13	10	8
81	42N054	Walshoutem	Fla	22	NA	22	20	20	22	20	20	20	18	17	17	16	15	13	10	11	10	8	7
82	44N051	Idegem	Fla							13	14	16	13	13	13	13	13	11	9	10	9	8	7
83	43N064	Rixensart	Wal																		10	8	7
84	44N029	Houtem (Veurne)	Fla	16	17	17	16	16	16	15	13	14	12	10	11	12	11	10	9	9	10	8	7
85	43N073	Vezin	Wal	NA	18	18	16	15	16	14	14	15	11	12	12	12	11	9	7	8	8	6	5
86	43N132	Habay-La-Neuve	Wal	14	15	13	12	12	13	12	10	11	10	9	9	9	9	8	7	8	6	5	5
87	43N066	Eupen	Wal	16	16	17	13	14	16	12	12	13	10	11	10	10	10	8	6	7	7	5	4
88	43N093	Sinsin	Wal	NA	14	14	12	14	16	12	12	12	10	10	10	9	9	7	7	7	8	5	4
89	43N113	Saint-Ode	Wal				NA	9	10	8	7	8	7	7	8	7	7	4	4	5	5	4	3
90	43N121	Offagne	Wal	13	NA	9	8	9	11	9	8	8	7	7	7	6	7	5	5	5	5	4	3
91	43N100	Dourbes	Wal	12	12	10	8	8	9	7	7	8	6	7	7	5	6	5	4	5	5	4	3
92	43N085	Vielsalm	Wal	10	11	8	7	7	8	8	6	7	6	6	6	6	7	5	5	5	5	3	2
93	43R201	Liège	Wal	34	35	35	31	29	30	28	27	NA
94	42R832	Ruisbroek	Fla	37	37	36	34	34	34	32
95	40SZ02	Steenokkerzeel	Fla	31	31	32	29	29	28	30	28	28	24	24	25	26	22	21	16
96	40R893	Antwerpen (haven)	Fla	41	43	42	41	40	38	39	40	36	36	36	35	36	32	30	28	NA
97	40WZ01	Lommel	Fla
98	42N015	Schilde	Fla	30	30	30	NA
99	42N045	Hasselt	Fla	30	30	29	30	27	29	27	26	25	23	23	24
100	41WOL1	Sint-Lambrechts-Woluwe	Bru	44	46	46	42	39	40	37	40	40	39	35	33	35	31	27	21
101	40R833	Stabroek	Fla								NA	31	30	30	29	30	26	25	23	NA
102	40LD01	Laakdal	Fla	29	29	30	27	26	28	27	24	24	21	21	21	19	17	NA
103	40HB23	Hoboken	Fla	34	34	34	32	32	33	30	29	28	27	27	27	26	26	24	19	NA
104	40ML01	Mechelen (Hombeeksestwg)	Fla	36	36	36	34	33	34	31	29
105	40OB01	Oostrozebeke	Fla	30	31	31	30	27	28	28	25	24
106	40EG05	Evergem (Rieme)	Fla																NA
107	42R010	Sint-Stevens-Woluwe	Fla	34	32	33	31	31	31	30	29	29	27	25	26	25	24	21	17
108	41B005	Brussel (Belliard)	Bru	40	39	43	37	39	41	39	36
109	42R841	Mechelen (Technologielaan)	Fla	33	NA	34	33	32	35	32	33	33	30	27	27
110	42R834	Boom	Fla								NA	26	23	22	23	23	22	20	15
111	42R894	Antwerpen (haven)	Fla	44	42	39	41	38	39	39	41	40	42	40	40	41
112	44M702	Ertvelde	Fla	26	26	25	25	25	27	24	23	24	22	21	21	21	21	19	15
113	44N050	Sint-Denijs	Fla
114	40GK09	Genk (Sluis Langerlo)	Fla				26	27	28	25	24	24	22	20	22	NA
115	42R823	Beveren-Waas	Fla												23	22	22	20	16
116	41B003	Brussel (Kunst-Wet)	Bru	93	98	97	101
117	40HR01		Fla
118	41AND3	Anderlecht	Bru
119	42R815	Zwijndrecht	Fla	36	NA	37	34	34	36	35	33	33	32	29	29	28
120	42R821	Beveren Waas	Fla	31	30	30	29	29	30	28	25	27	24	NA
121	43N063	Corroy-Le-Grand	Wal	NA	24	26	24	22	23	20	19	21	17	17	19	17	16	14	11	13

(info) : Running average : average of the daily mean concentrations from 03/07/2023 till 03/07/2024. This period shifts daily with one day. A compliancy check with the EU limit value will only be possible on 31/12.

"NA" means that there were less then 75% available days with sufficient measuring data to calculate the annual mean PM10 concentration..

(*) Calculated with not validated data

(**) Between 1 August and 21 November 2018, a technical problem occurred at the Ixelles monitoring station (41R002) resulting in an underestimation of nitrogen dioxide concentrations. Data measured during this period have been invalidated. As a result, the minimum data acquisition rate required by Directive 2008/50/EC (90%) is not respected at this station and the annual average of 42 μg/m³ is not representative. However, this station would probably exceed the European annual limit value of 40 μg/m³ if the 90% data acquisition rate was respected.
More info (report in FR): ici