YVEL à MERDRIGNAC, paramètre Nitrates mg(NO3)/L

27/01/16
28
24/02/16
27
30/03/16
28
27/04/16
37
25/05/16
38
28/07/16
31
29/08/16
14
29/09/16
11
26/10/16
5.5
23/11/16
15
30/01/17
20
28/02/17
18
29/03/17
26
29/05/17
17
26/07/17
11
29/08/17
23
28/09/17
7.2
31/10/17
4.7
30/11/17
9.3
20/12/17
7.1
30/01/18
31
27/02/18
38
28/03/18
25
24/04/18
35
30/05/18
22
27/06/18
36
30/07/18
17
27/08/18
25
26/09/18
8
30/10/18
6
17/12/18
15
31/01/19
20
27/02/19
33
28/03/19
29
30/04/19
25
28/05/19
28
26/06/19
24
31/07/19
14
27/08/19
20
24/09/19
4
30/10/19
15
27/11/19
16
16/12/19
27
29/01/20
28
26/02/20
23
30/03/20
39
29/04/20
21
27/05/20
36
30/06/20
34
30/07/20
36
27/08/20
27
28/09/20
22
27/10/20
19
25/11/20
27
22/12/20
13
24/01/22
33.9
22/02/22
26.2
28/03/22
32.6
28/04/22
33.2
31/05/22
33.6
28/06/22
28.1
27/07/22
24.7
26/10/22
1.6
29/11/22
16.6
20/12/22
15.1