SEVRE NIORTAISE À MAILLE, paramètre Nitrates mg(NO3)/L

22/02/12
42
10/05/12
36
27/06/12
29
23/08/12
5
08/10/12
12
19/12/12
35
18/02/13
38
06/05/13
42
24/06/13
33
19/08/13
27
16/12/13
44
17/02/14
28
05/05/14
36
23/06/14
33
21/08/14
33
08/10/14
24
15/12/14
39
23/02/15
38
04/05/15
28
22/06/15
30
18/08/15
15
20/10/15
31
14/12/15
31
22/02/16
35
09/05/16
33
20/06/16
31
25/08/16
7
25/10/16
10
13/12/16
19
22/02/17
32
10/05/17
32
21/06/17
7
23/08/17
2
25/10/17
0.6
13/12/17
13
21/02/18
41
16/05/18
40
20/06/18
32
22/08/18
9.2
17/10/18
15.7
12/12/18
49.3