Max O3, last 14 days

O₃ concentrations per day (µg/m³), 12/06/2026 - 25/06/2026

Hoogste uurgemiddeldeHoogste 8-uurgemiddelde

- Click on the figures in the table cells to get an evolution graph of daily concentrations
- Click on the date to get an interpolation map
- "NA" means no or not enough data were available
[O₃]"ozone day" : day with at least one exeedance in Belgium of the EU threshold for information of the public (180 μg/m3)

Code city 12/06 13/06 14/06 15/06 16/06 17/06 18/06 19/06 20/06 21/06 22/06 23/06 24/06[O₃]
25/06[O₃]

41B011 Sint-Agatha-Berchem 46.5 78.5 73 78 106.5 71.5 118 121.5 94.5 114.5 126 129 147.5 204.5

41MEU1 Neder-Over-Heembeek 40.5 80.5 75.5 81.5 112 68.5 112.5 123.5 100 106.5 116 124.5 148 167.5

41N043 Voorhaven (Haren) 41 75 71 65 105 64 101.5 108.5 98.5 116.5 118 115.5 145 177

41R001 Sint-Jans-Molenbeek 40.5 70 67.5 68.5 99 67.5 101.5 115 93 118.5 124 115.5 155.5 197

41R012 Ukkel 44.5 78 72 74.5 106 67 106.5 111 101.5 120 125 113 137.5 193

42N016 Dessel 46 85 75 104 130.5 72 114.5 122 141 149.5 134.5 135 155 191

42N027 Bree 49 90 81.5 103 143 83 117 140.5 168.5 146 129.5 128.5 181.5 196

42N035 Aarschot 51 87.5 79 98.5 120 75 120 128.5 124.5 151 131.5 141.5 142 202.5

42N040 Sint-Pieters-Leeuw 46.5 78.5 72 82 108.5 71.5 114.5 117.5 95.5 111 122 119 140.5 192

42N046 Gellik 51 92.5 77.5 98 124 66.5 115.5 134 138 136.5 137 129.5 161.5 191.5

42N047 Hasselt 47 85.5 75 94 120 67.5 101.5 122 132.5 137.5 128.5 139 143 212.5

42R801 Borgerhout 46.5 83 74.5 90.5 107 67 150 137.5 110 128.5 122 126.5 170 185.5

42R811 Schoten 49.5 83 76.5 98.5 110.5 72.5 147.5 143.5 101 124.5 124.5 135 169.5 196

42R842 Mechelen (Hendrik Speecqvest) 45.5 81.5 73 83 102 62.5 127.5 122 106 116 119 116 158.5 176.5

44M705 Roeselare (Haven) 48 87 77 80 113.5 75 120.5 145.5 86.5 139.5 154.5 126 184 214.5

44N012 Moerkerke 49 85.5 74.5 82 102 73 71.5 131 48.5 112 119.5 145.5 188 207.5

44N029 Houtem (Veurne) 43 83 73.5 81 107 84.5 79 140 56 111.5 113.5 128 204 171.5

44R701 Gent (Baudelopark) 48.5 84 77 86 113 75.5 107 130.5 89.5 177.5 153 150 161.5 222.5

44R710 Destelbergen 50 84 75.5 85 110.5 78.5 106.5 127.5 96.5 179 153 150 153.5 206

43N060 Havinnes 41 73 66.5 76 90.5 78.5 108.5 151 151.5 89.5 NA NA NA 177.5

43N064 Rixensart 45.5 82.5 77.5 85 109 64.5 102.5 112 99.5 118 108.5 98 125 191.5

43N066 Eupen 45 79.5 73.5 86.5 108 63 104 120.5 141.5 141 155 127 159.5 190.5

43N070 Mons 32.5 71.5 69.5 75.5 83.5 57.5 91 90.5 100.5 112 120 107.5 117 176.5

43N073 Vezin 43.5 81 76 86 104.5 62.5 97.5 113 144.5 112.5 131 135.5 127 215.5

43N085 Vielsalm 43.5 69.5 71 78 85.5 64.5 108.5 119 110.5 106 132 103 133 157

43N093 Sinsin 50 82.5 75 82 97 60.5 97.5 111 124 106 145 116 125.5 198.5

43N100 Dourbes 49 92 81.5 85.5 91.5 64.5 109.5 122 120.5 111 NA 108.5 127.5 141

43N113 Saint-Ode 51.5 NA 76.5 74.5 86 65 95.5 NA NA NA 122 108.5 116.5 134.5

43N121 Offagne 34.5 89 71.5 73 75 54 107 98.5 112.5 102.5 128 111.5 113 136

43N132 Habay-La-Neuve 45 88 71.5 74 81 66.5 112 118.5 117.5 110 119 101.5 118.5 134

43R221 Herstal 47 86.5 83 86.5 116 73 100 116 139 134.5 150 127.5 146.5 195

43R222 Liège (ISSeP) NA NA NA 78 NA 68 124.5 138 168.5 NA NA NA NA NA

43R240 Engis 32.5 79 72.5 76.5 94 59 89.5 110.5 126.5 107 129 163.5 149.5 200.5

43R401 Namur 47 84.5 74 87.5 103 59.5 100 115.5 135 108 120 140.5 125.5 194

45R502 Lodelinsart 36 74 68 78 89 54.5 90 115 102 107 115 108 128 201

Interpolated spatial average in :
Brussels 44 77 72 75 105 68 106 113 97 114 120 114 136 182
Flanders 47 84 75 88 110 73 108 130 103 130 128 129 156 190
Wallonia 43 79 72 79 92 62 99 115 116 109 124 108 124 164
Belgium 45 81 74 83 100 67 103 122 110 118 126 118 139 176

% of the population exposed to O₃ concentrations > 180 μg/m³ in:
Brussels 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 67%
Flanders 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 5% 92%
Wallonia 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% <1% 57%
Belgium 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 3% 78%

% of the population exposed to O₃ concentrations > 240 μg/m³ in:
Brussels 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Flanders 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Wallonia 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Belgium 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%

Code	city	12/06	13/06	14/06	15/06	16/06	17/06	18/06	19/06	20/06	21/06	22/06	23/06	24/06[O₃]	25/06[O₃]
41B011	Sint-Agatha-Berchem	46.5	78.5	73	78	106.5	71.5	118	121.5	94.5	114.5	126	129	147.5	204.5
41MEU1	Neder-Over-Heembeek	40.5	80.5	75.5	81.5	112	68.5	112.5	123.5	100	106.5	116	124.5	148	167.5
41N043	Voorhaven (Haren)	41	75	71	65	105	64	101.5	108.5	98.5	116.5	118	115.5	145	177
41R001	Sint-Jans-Molenbeek	40.5	70	67.5	68.5	99	67.5	101.5	115	93	118.5	124	115.5	155.5	197
41R012	Ukkel	44.5	78	72	74.5	106	67	106.5	111	101.5	120	125	113	137.5	193
42N016	Dessel	46	85	75	104	130.5	72	114.5	122	141	149.5	134.5	135	155	191
42N027	Bree	49	90	81.5	103	143	83	117	140.5	168.5	146	129.5	128.5	181.5	196
42N035	Aarschot	51	87.5	79	98.5	120	75	120	128.5	124.5	151	131.5	141.5	142	202.5
42N040	Sint-Pieters-Leeuw	46.5	78.5	72	82	108.5	71.5	114.5	117.5	95.5	111	122	119	140.5	192
42N046	Gellik	51	92.5	77.5	98	124	66.5	115.5	134	138	136.5	137	129.5	161.5	191.5
42N047	Hasselt	47	85.5	75	94	120	67.5	101.5	122	132.5	137.5	128.5	139	143	212.5
42R801	Borgerhout	46.5	83	74.5	90.5	107	67	150	137.5	110	128.5	122	126.5	170	185.5
42R811	Schoten	49.5	83	76.5	98.5	110.5	72.5	147.5	143.5	101	124.5	124.5	135	169.5	196
42R842	Mechelen (Hendrik Speecqvest)	45.5	81.5	73	83	102	62.5	127.5	122	106	116	119	116	158.5	176.5
44M705	Roeselare (Haven)	48	87	77	80	113.5	75	120.5	145.5	86.5	139.5	154.5	126	184	214.5
44N012	Moerkerke	49	85.5	74.5	82	102	73	71.5	131	48.5	112	119.5	145.5	188	207.5
44N029	Houtem (Veurne)	43	83	73.5	81	107	84.5	79	140	56	111.5	113.5	128	204	171.5
44R701	Gent (Baudelopark)	48.5	84	77	86	113	75.5	107	130.5	89.5	177.5	153	150	161.5	222.5
44R710	Destelbergen	50	84	75.5	85	110.5	78.5	106.5	127.5	96.5	179	153	150	153.5	206
43N060	Havinnes	41	73	66.5	76	90.5	78.5	108.5	151	151.5	89.5	NA	NA	NA	177.5
43N064	Rixensart	45.5	82.5	77.5	85	109	64.5	102.5	112	99.5	118	108.5	98	125	191.5
43N066	Eupen	45	79.5	73.5	86.5	108	63	104	120.5	141.5	141	155	127	159.5	190.5
43N070	Mons	32.5	71.5	69.5	75.5	83.5	57.5	91	90.5	100.5	112	120	107.5	117	176.5
43N073	Vezin	43.5	81	76	86	104.5	62.5	97.5	113	144.5	112.5	131	135.5	127	215.5
43N085	Vielsalm	43.5	69.5	71	78	85.5	64.5	108.5	119	110.5	106	132	103	133	157
43N093	Sinsin	50	82.5	75	82	97	60.5	97.5	111	124	106	145	116	125.5	198.5
43N100	Dourbes	49	92	81.5	85.5	91.5	64.5	109.5	122	120.5	111	NA	108.5	127.5	141
43N113	Saint-Ode	51.5	NA	76.5	74.5	86	65	95.5	NA	NA	NA	122	108.5	116.5	134.5
43N121	Offagne	34.5	89	71.5	73	75	54	107	98.5	112.5	102.5	128	111.5	113	136
43N132	Habay-La-Neuve	45	88	71.5	74	81	66.5	112	118.5	117.5	110	119	101.5	118.5	134
43R221	Herstal	47	86.5	83	86.5	116	73	100	116	139	134.5	150	127.5	146.5	195
43R222	Liège (ISSeP)	NA	NA	NA	78	NA	68	124.5	138	168.5	NA	NA	NA	NA	NA
43R240	Engis	32.5	79	72.5	76.5	94	59	89.5	110.5	126.5	107	129	163.5	149.5	200.5
43R401	Namur	47	84.5	74	87.5	103	59.5	100	115.5	135	108	120	140.5	125.5	194
45R502	Lodelinsart	36	74	68	78	89	54.5	90	115	102	107	115	108	128	201

Interpolated spatial average in :
Brussels	44	77	72	75	105	68	106	113	97	114	120	114	136	182
Flanders	47	84	75	88	110	73	108	130	103	130	128	129	156	190
Wallonia	43	79	72	79	92	62	99	115	116	109	124	108	124	164
Belgium	45	81	74	83	100	67	103	122	110	118	126	118	139	176

% of the population exposed to O₃ concentrations > 180 μg/m³ in:
Brussels	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	67%
Flanders	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	5%	92%
Wallonia	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	<1%	57%
Belgium	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	3%	78%

% of the population exposed to O₃ concentrations > 240 μg/m³ in:
Brussels	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
Flanders	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
Wallonia	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
Belgium	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%

Color legend: Kleurlegende

These data are not validated : they should not be used for any study whatsoever
The use or publication of the data is allowed only when the source (www.irceline.be) is acknowledged