YVEL à SAINT-BRIEUC-DE-MAURON, paramètre Nitrates mg(NO3)/L

15/01/13
40.4
12/02/13
46.1
18/04/13
46.7
17/05/13
49.2
12/06/13
41
02/07/13
43.5
08/08/13
38.1
11/10/13
9.1
12/11/13
22
18/12/13
39
06/03/14
41
15/04/14
45
12/05/14
42
16/06/14
45
04/07/14
31
12/08/14
18
15/09/14
34
02/10/14
22
07/11/14
16
12/12/14
37
07/01/15
41
17/02/15
31
06/03/15
44
13/04/15
46
19/05/15
42
12/06/15
37
09/07/15
30
06/08/15
17
02/09/15
15
06/10/15
16
16/11/15
10
07/12/15
17
07/02/19
17
08/04/19
28
17/06/19
28
29/08/19
5.4
14/10/19
9.5
16/12/19
38
18/02/21
40
07/04/21
45
30/06/21
28
10/08/21
32
14/10/21
37
21/12/21
38
17/11/22
21
14/12/22
35
13/01/23
35
08/02/23
45
08/03/23
36
11/04/23
41
25/05/23
37
22/06/23
28
25/07/23
17
22/08/23
19
07/09/23
8.6