RUISSEAU D'YZERNAY A MAULEVRIER, paramètre Nitrates mg(NO3)/L

16/01/15
28
19/02/15
30
17/03/15
24
15/04/15
13
02/06/15
12
13/10/15
25
12/11/15
23
08/12/15
24
02/03/16
19
30/03/16
16
19/04/16
15
23/06/16
26
10/10/16
20
15/11/16
21
13/12/16
18
08/03/17
52
11/04/17
27
20/06/17
27
17/10/17
24
14/11/17
6
05/12/17
36
08/04/19
11.3
19/06/19
6.2
07/10/19
4.5
04/11/19
28.6
02/12/19
58.3