CALAIS à SAINT-MICHEL-CHEF-CHEF, paramètre Orthophosphates (PO4)
mg(PO4)/L
13/02/19
0.31
15/04/19
0.42
06/06/19
1.28
09/08/19
2.3
15/10/19
0.65
17/12/19
0.45
12/02/20
0.49
06/04/20
0.93
02/06/20
1.14
12/08/20
4.78
21/10/20
0.39
08/12/20
0.38
03/02/21
0.31
21/04/21
0.58
30/06/21
0.8
19/08/21
0.88