info:
The number of days with daily highest 8-hour mean ozone concentrations higher then 120 µg/m³ are published in the table below.
According to EC directive 2002/3/EC the target value for the protection of human health, is the daily highest 8-hour ozone concentration that cannot be exceeded more then 25 times days per calender year averaged over three years. The averages over three years are published in the yellow table cells. The orange table cells indicate a value higher then 25.
Besides the averages over three years the number of exceedances is also published per calender year. 2010 will be the first year to calculate compliance with the directive.
The long-term objective for the protection of human health, is no more exceedances of the daily highest 8-hour mean of 120 µg/m³.
This table will be updated every day at around 07:00 AM.

stacode	city	region	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023(*)
41AND3	Anderlecht	Bru			13
			13			NA
41B004	Brussel (Sint-Katelijne)	Bru			14	14	16	11	12	20	14	13	9	8	8	6	7	5	5	7	8	12	8	8
			10	7	26	9	12	NA		20	8	11	8	6	9	2	9	3	3	16	6	15	3	7	0
41B006	Brussel (EU Parlement)	Bru			14	16	17	16	15	16	9	12	10	9	6	6	8	11	11
			0	9	32	8	10	29	6	12	10	13	7	6	5	NA	11	NA
41B011	Sint-Agatha-Berchem	Bru			26	23	24	22	20	22	15	16	13	12	11	10	11	9	11	17	21	24	15	15
			26	12	39	17	16	33	11	22	11	16	11	8	14	7	12	9	11	32	21	19	6	21	16
41MEU1	Neder-Over-Heembeek	Bru																		27	27	23	13	15
																				27	NA	19	6	19	15
41N043	Voorhaven (Haren)	Bru			17	13	17	13	12	11	7	6	5	5	5	3	4	3	4	7	10	14	8	9
			18	7	25	8	NA	18	6	9	5	4	5	6	3	0	8	1	3	18	9	14	1	11	11
41R001	Sint-Jans-Molenbeek	Bru			15	11	11	11	11	8	3	5	7	7	4	2	2	1	3	7	11	14	10	8
			16	7	21	5	8	21	3	1	4	10	6	5	2	0	4	0	4	17	13	13	3	NA	11
41R012	Ukkel	Bru			25	24	25	24	23	24	18	18	15	13	11	9	11	9	9	14	17	20	15	18
			26	12	38	21	17	35	16	22	16	17	13	9	12	7	14	5	9	27	14	19	12	24	15
41WOL1	Sint-Lambrechts-Woluwe	Bru			10	19	12	11	8	8	4	7	6	7	4	3	1		1	3	4	6	6	9
			0	NA	19	NA	5	16	2	7	4	9	5	6	2	0	NA	0	2	6	3	9
42N016	Dessel	Fla			37	32	27	26	23	26	13	16	16	14	13	12	16	17	17	27	28	31	18	19
			27	NA	46	18	18	41	11	NA	15	17	16	9	14	14	19	18	15	47	21	26	8	23	23
42N027	Bree	Fla										21	21	17	13	11	15	17	20	27	28	29	17	18
										NA	NA	21	20	10	10	12	22	18	21	41	22	24	6	24	17
42N035	Aarschot	Fla			29	25	27	24	23	22	16	17	16	15	14	11	14	14	18	25	27	30	18	18
			31	14	41	20	19	33	16	18	15	18	16	11	14	8	20	14	19	42	21	27	6	22	21
42N040	Sint-Pieters-Leeuw	Fla			19	24	26	22	18	19	12	14	13	12	11	8	9	9	14	22	23	24	14	15
			6	11	41	20	16	31	7	18	10	15	13	8	12	4	12	12	17	36	15	20	6	20	17
42N045	Hasselt	Fla			40	40	40	30	30	30	15	16	17	14	14	12	15	17	19	19
					40	NA	NA	30	NA	NA	15	17	18	8	15	12	19	19
42N046	Gellik	Fla			33	43	30	24	24	18	7	11	14	13	10	8	13	15	17	23	25	27	16	16
			23	NA	43	NA	17	31	NA	4	9	19	13	7	9	9	20	15	15	39	21	22	4	23	19
42N047	Hasselt	Fla																				25	15	17
																					NA	25	4	22	22
42N054	Walshoutem	Fla			25	22	25	25	23	21	15	15	14	12	11	10	12	10	13	20	23	26	14	14
			26	11	37	19	20	35	15	14	NA	16	12	7	14	8	14	9	17	35	18	24	0	19	14
42R801	Borgerhout	Fla			13	12	12	14	14	23	4	8	7	8	6	4	3	2	2	5	7	10	3	6
			15	5	18	13	5	23	NA	NA	4	11	6	7	4	1	4	0	3	13	6	NA	0	11	17
42R811	Schoten	Fla			34	25	21	21	24	26	18	17	17	14	12	9	11	13	15	22	23	24	14	13
					34	15	13	34	NA	18	NA	15	18	8	10	8	15	15	15	35	19	18	5	17	18
42R831	Berendrecht	Fla			5	12	16	22	18	18	7	8	8	8	6	6	8	9	11	15	18	20	15	15
			2	7	NA	16	NA	28	7	NA	NA	8	NA	7	5	5	13	8	12	25	16	20	8	16	18
42R841	Mechelen (Technologielaan)	Fla				12	13	13	13	14	14	13	11	9	8	8	8	9	9	9
					NA	12	13	NA	NA	14	NA	11	NA	7	8	NA	NA	9
44M705	Roeselare (Haven)	Fla			16	17	15	12	8	6	1	3	4	6	4	3	3	4	7	12	14	15	9	9
			15	10	24	NA	6	17	1	0	2	8	3	6	3	1	6	6	10	20	13	13	0	14	14
44N012	Moerkerke	Fla			12	11	10	14	10	12	3	4	4	5	4	4	5	9	9	12	13	13	10	11
			14	9	NA	13	7	21	2	NA	3	5	4	NA	4	NA	6	11	10	15	13	12	6	14	16
44N029	Houtem (Veurne)	Fla			13	14	15	14	10	10	4	5	4	5	5	3	3	4	5	8	9	11	8	8
			12	6	22	NA	8	20	2	9	2	4	7	5	3	1	5	5	4	14	9	11	4	9	11
44N050	Sint-Denijs	Fla			23	23	35
			24	11	35	NA
44N051	Idegem	Fla			25	23	24	24	21	21	12	13	13	12	11	7	9	7	10	20	22	24	17	21
			27	14	34	20	18	34	10	18	7	15	16	6	12	4	10	7	14	39	12	22	NA	19	16
44N052	Zwevegem	Fla					9	17	13	12	5	6	4	6	5	4	4	3	7	13	17	19	12	11
							9	24	5	7	4	NA	4	8	3	2	6	2	12	25	14	17	5
44R701	Gent (Baudelopark)	Fla			20	19	15	15	13	14	7	8	9	11	8	5	5	6	9	14	17	20	14	12
			15	NA	24	13	9	24	7	10	3	12	13	8	4	3	8	8	11	22	18	19	4	NA	17
44R710	Destelbergen	Fla			30	22	19	18	16	17	9	11	9	11	9	7	8	7	9	13	18	19	13	13
					30	14	13	27	8	16	4	12	11	9	8	3	12	5	11	24	19	15	5	18	14
44R740	Sint-Kruiswinkel	Fla			14	10	10	10	9	10	6	6	7	10	9	6	8	7	10	14	16	17	11	13
			18	9	NA	11	9	NA	NA	10	2	NA	11	8	8	3	12	7	12	22	14	15	5	18	14
43N060	Havinnes	Wal											7	6	6	5	5	5	6	11	12	16	9	8
													7	5	7	2	7	5	5	22	10	15	2	7	18
43N063	Corroy-Le-Grand	Wal						27	19	15	8	10	10	10	9	7	9	6	9	16	20	24	14	14
							NA	27	11	6	8	15	8	7	12	3	12	4	10	34	15	24	3
43N066	Eupen	Wal			32	31	32	27	23	26	11	9	13	12	13	10	11	9	10	21	23	29	10	12
			26	16	53	24	18	40	12	NA	9	NA	17	6	15	8	11	8	12	42	15	NA	4	20	20
43N070	Mons	Wal			15	14	15	13	11	11	6	6	6	6	7	6	6	3	5	12	15	21	13	15
			14	5	25	11	8	21	5	6	6	6	6	7	9	1	7	2	7	27	12	25	3	16	11
43N073	Vezin	Wal			27	27	31	27	23	19	12	11	12	11	11	10	15	13	14	21	25	27	16	15
			27	13	40	NA	21	33	14	11	10	13	13	7	13	NA	16	10	16	38	21	21	5	19	18
43N085	Vielsalm	Wal			33	44	44	27	27	17	6	8	12	13	15	11	13	10	10	16	17	20	10	10
			21	NA	44	NA	NA	27	NA	6	6	13	18	9	19	6	15	9	7	31	13	16	2	12	13
43N093	Sinsin	Wal			23	20	23	24	27	36	11	17	16	16	13	9	11	8	10	15	22	26	17	14
			25	8	35	18	17	36	NA	NA	11	23	15	9	15	2	16	5	9	31	25	22	3	17	16
43N100	Dourbes	Wal			40	41	41	36	37	29	17	19	19	18	18	13	16	12	14	20	24	31	21	20
			32	NA	47	34	NA	37	NA	20	14	22	20	12	23	4	20	11	12	37	23	32	9	18	17
43N113	Saint-Ode	Wal			27	29	37	30	23	18	9	13	16	16	15	9	12	9	11	21	19	22	13	13
			24	11	46	NA	27	32	10	11	6	21	22	6	17	4	14	NA	8	33	17	17	4	18	14
43N121	Offagne	Wal			37	37	31	28	25	24	14	16	15	14	12	7	12	10	12	16	17	22	13	14
			26	NA	47	26	21	38	15	18	9	22	14	6	15	1	20	10	6	33	13	21	5	17	11
43N132	Habay-La-Neuve	Wal			32	33	37	29	24	25	13	17	17	17	14	11	14	12	13	18	21	25	15	13
			30	15	51	NA	22	36	14	NA	11	23	16	11	16	7	19	11	8	36	18	20	8	12	14
43R201	Liège	Wal			19	18	21	19	19	14	8	9	12	11	9	4
			14	7	36	11	17	28	12	3	9	15	13	4	NA
43R221	Herstal	Wal													13	9	9	6	9	17	22	23	12	11
															13	4	11	3	13	36	18	15	3	14	18
43R222	Liège (ISSeP)	Wal					13	13	9	4	5	6	9	8	9	7	9	7	10	18	22	24	13	12
							13	NA	4	3	8	NA	9	6	12	4	12	5	12	37	16	19	3	15	17
43R240	Engis	Wal			19	19	24	21	21	17	11	13	14	13	13	10	13	11	15	25	21	23	12	14
			20	6	31	21	19	23	NA	10	12	16	15	8	17	6	16	NA	14	35	15	19	3	20	16
43R401	Namur	Wal
																					NA	NA	NA	NA	9
45R502	Lodelinsart	Wal			21	20	23	20	22	20	9	9	9	8	8	4	7	5	7	16	19	22	11	11
			17	6	39	15	16	28	NA	12	6	10	12	3	8	2	10	4	8	35	14	18	2	14	9

(*) Not validated data.
"NA" means that there were less then 75% available days in the summer season (april-september) with sufficient measuring data to calculate the daily highest 8-hour mean ozone concentration.