O3, last 14 days

O₃ concentrations per day (µg/m³), 09/06/2025 - 22/06/2025

Highest hourly meanHighest 8-hourly mean

- 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 exceedance in Belgium of the EU threshold for information of the public (180 μg/m3)

Code city 09/06 10/06 11/06 12/06 13/06[O₃]
14/06 15/06 16/06 17/06 18/06 19/06 20/06 21/06 22/06

41B011 Sint-Agatha-Berchem 100 77 131 135 163 124 99 107 119 131 120 128 136 111

41MEU1 Neder-Over-Heembeek 90 69 122 134 155 115 96 107 18 NA 121 131 140 113

41N043 Voorhaven (Haren) 100 73 126 130 160 119 100 110 124 133 120 131 139 111

41R001 Sint-Jans-Molenbeek 98 72 124 125 157 118 95 101 116 128 115 126 138 111

41R012 Ukkel 91 74 133 131 156 120 102 113 130 141 127 130 139 115

42N016 Dessel 89 80 119 142 176 NA NA 100 129 143 111 124 146 120

42N027 Bree 96 90 128 146 174 136 110 122 138 160 116 142 152 137

42N035 Aarschot 96 82 121 132 174 119 100 122 150 143 119 137 143 125

42N040 Sint-Pieters-Leeuw 93 74 132 131 158 118 99 110 128 134 127 132 142 113

42N046 Gellik 96 91 126 133 166 126 102 133 126 152 111 128 139 118

42N047 Hasselt 98 90 130 138 184 129 102 129 137 163 121 140 149 126

42R801 Borgerhout 99 80 118 131 162 117 96 94 136 108 121 124 146 123

42R811 Schoten 101 78 119 148 179 115 94 100 138 114 122 128 154 118

42R842 Mechelen (Hendrik Speecqvest) 93 72 120 130 162 119 92 102 117 127 113 134 139 110

44M705 Roeselare (Haven) 94 72 125 135 138 98 97 90 116 109 147 124 155 101

44N012 Moerkerke 91 80 129 140 118 103 92 83 110 91 137 133 151 105

44N029 Houtem (Veurne) 91 70 129 133 127 103 86 84 92 96 135 121 145 93

44R701 Gent (Baudelopark) 94 75 125 134 151 115 93 95 134 107 145 129 150 100

44R710 Destelbergen 92 76 124 130 180 113 94 94 131 107 139 126 145 101

43N060 Havinnes 83 63 117 117 147 NA NA NA NA NA 136 128 142 105

43N064 Rixensart 97 85 132 133 161 121 104 119 140 145 128 140 144 121

43N066 Eupen 79 87 130 130 138 124 87 126 142 134 108 127 125 122

43N070 Mons 75 67 119 105 172 101 87 105 129 133 123 123 125 102

43N073 Vezin 89 73 123 138 167 108 94 119 139 144 121 127 130 113

43N085 Vielsalm 75 94 108 136 142 123 70 96 119 126 113 107 130 117

43N093 Sinsin 91 83 117 143 136 117 89 111 129 137 118 116 130 119

43N100 Dourbes 89 88 115 129 128 107 90 107 111 135 123 119 130 124

43N113 Saint-Ode 81 104 117 135 134 122 74 102 123 128 110 108 144 116

43N121 Offagne 83 105 111 127 139 115 71 101 119 121 115 100 129 107

43N132 Habay-La-Neuve 82 105 115 132 149 108 61 87 NA 107 104 100 141 106

43R221 Herstal 92 91 126 123 156 122 92 128 138 138 108 126 129 116

43R222 Liège (ISSeP) 90 91 125 130 156 130 90 122 139 134 113 126 131 116

43R240 Engis 89 86 123 132 153 123 81 114 127 128 113 124 127 109

43R401 Namur 92 90 118 131 154 114 95 114 140 143 116 118 126 117

45R502 Lodelinsart 82 72 120 132 164 111 90 108 137 131 115 121 122 114

Interpolated spatial average in :

Brussels 96 76 127 130 154 118 98 109 126 132 121 128 136 112

Flanders 96 83 125 137 153 112 97 103 127 122 127 130 145 111

Wallonia 86 90 119 131 145 111 81 106 126 129 116 118 131 108

Belgium 91 86 122 134 149 112 88 105 126 126 121 123 137 109

% 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% 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%

% 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	09/06	10/06	11/06	12/06	13/06[O₃]	14/06	15/06	16/06	17/06	18/06	19/06	20/06	21/06	22/06
41B011	Sint-Agatha-Berchem	100	77	131	135	163	124	99	107	119	131	120	128	136	111
41MEU1	Neder-Over-Heembeek	90	69	122	134	155	115	96	107	18	NA	121	131	140	113
41N043	Voorhaven (Haren)	100	73	126	130	160	119	100	110	124	133	120	131	139	111
41R001	Sint-Jans-Molenbeek	98	72	124	125	157	118	95	101	116	128	115	126	138	111
41R012	Ukkel	91	74	133	131	156	120	102	113	130	141	127	130	139	115
42N016	Dessel	89	80	119	142	176	NA	NA	100	129	143	111	124	146	120
42N027	Bree	96	90	128	146	174	136	110	122	138	160	116	142	152	137
42N035	Aarschot	96	82	121	132	174	119	100	122	150	143	119	137	143	125
42N040	Sint-Pieters-Leeuw	93	74	132	131	158	118	99	110	128	134	127	132	142	113
42N046	Gellik	96	91	126	133	166	126	102	133	126	152	111	128	139	118
42N047	Hasselt	98	90	130	138	184	129	102	129	137	163	121	140	149	126
42R801	Borgerhout	99	80	118	131	162	117	96	94	136	108	121	124	146	123
42R811	Schoten	101	78	119	148	179	115	94	100	138	114	122	128	154	118
42R842	Mechelen (Hendrik Speecqvest)	93	72	120	130	162	119	92	102	117	127	113	134	139	110
44M705	Roeselare (Haven)	94	72	125	135	138	98	97	90	116	109	147	124	155	101
44N012	Moerkerke	91	80	129	140	118	103	92	83	110	91	137	133	151	105
44N029	Houtem (Veurne)	91	70	129	133	127	103	86	84	92	96	135	121	145	93
44R701	Gent (Baudelopark)	94	75	125	134	151	115	93	95	134	107	145	129	150	100
44R710	Destelbergen	92	76	124	130	180	113	94	94	131	107	139	126	145	101
43N060	Havinnes	83	63	117	117	147	NA	NA	NA	NA	NA	136	128	142	105
43N064	Rixensart	97	85	132	133	161	121	104	119	140	145	128	140	144	121
43N066	Eupen	79	87	130	130	138	124	87	126	142	134	108	127	125	122
43N070	Mons	75	67	119	105	172	101	87	105	129	133	123	123	125	102
43N073	Vezin	89	73	123	138	167	108	94	119	139	144	121	127	130	113
43N085	Vielsalm	75	94	108	136	142	123	70	96	119	126	113	107	130	117
43N093	Sinsin	91	83	117	143	136	117	89	111	129	137	118	116	130	119
43N100	Dourbes	89	88	115	129	128	107	90	107	111	135	123	119	130	124
43N113	Saint-Ode	81	104	117	135	134	122	74	102	123	128	110	108	144	116
43N121	Offagne	83	105	111	127	139	115	71	101	119	121	115	100	129	107
43N132	Habay-La-Neuve	82	105	115	132	149	108	61	87	NA	107	104	100	141	106
43R221	Herstal	92	91	126	123	156	122	92	128	138	138	108	126	129	116
43R222	Liège (ISSeP)	90	91	125	130	156	130	90	122	139	134	113	126	131	116
43R240	Engis	89	86	123	132	153	123	81	114	127	128	113	124	127	109
43R401	Namur	92	90	118	131	154	114	95	114	140	143	116	118	126	117
45R502	Lodelinsart	82	72	120	132	164	111	90	108	137	131	115	121	122	114

Interpolated spatial average in :
Brussels	96	76	127	130	154	118	98	109	126	132	121	128	136	112
Flanders	96	83	125	137	153	112	97	103	127	122	127	130	145	111
Wallonia	86	90	119	131	145	111	81	106	126	129	116	118	131	108
Belgium	91	86	122	134	149	112	88	105	126	126	121	123	137	109

% 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%	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%

% 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