CALAIS à SAINT-MICHEL-CHEF-CHEF, paramètre Nitrates mg(NO3)/L

13/02/19
8.2
15/04/19
3.9
06/06/19
7.3
09/08/19
2.2
15/10/19
11
17/12/19
8.3
12/02/20
10
06/04/20
14
02/06/20
1.2
12/08/20
16
21/10/20
5.7
08/12/20
50
03/02/21
4.9
21/04/21
8.1
30/06/21
0.94
19/08/21
2.8
28/10/21
27
10/12/21
13
16/02/22
3.2
14/04/22
31
15/06/22
0.97
04/08/22
27
12/10/22
6.1