OUST à SAINT-MAUDAN, paramètre Nitrates mg(NO3)/L

20/02/13
50
18/04/13
41
20/06/13
33
14/08/13
16
17/10/13
9
11/12/13
31
20/02/14
41
23/04/14
38
18/06/14
30
18/08/14
17
20/10/14
14
04/12/14
35
04/02/15
42
08/04/15
37
09/06/15
33
19/08/15
13
08/10/15
16
08/12/15
16
17/02/16
41
19/04/16
38
16/06/16
30
11/08/16
14
18/10/16
9
08/12/16
16
20/02/17
40
18/04/17
34
20/06/17
26
21/08/17
7
17/10/17
4
18/12/17
31
20/02/18
40
19/04/18
40
20/06/18
26
20/08/18
9
18/10/18
8
19/12/18
30
25/02/19
44
23/04/19
33
20/06/19
24
21/08/19
12
21/10/19
22
18/12/19
35
13/02/20
36
14/04/20
38
09/06/20
33
06/08/20
21
06/10/20
20
08/12/20
31
16/02/21
36
13/04/21
29
12/08/21
18
12/10/21
16
07/12/21
22
22/02/22
34
19/04/22
31
21/06/22
18
16/08/22
15
18/10/22
6
13/12/22
27
14/02/23
41
11/04/23
37
20/06/23
19