VILAINE à BOURGON, paramètre Nitrates mg(NO3)/L

19/02/13
41.4
03/04/13
38.7
04/06/13
26.9
02/08/13
15.3
17/10/13
11
03/12/13
24
04/02/14
35
08/04/14
27
03/06/14
17
05/08/14
14
29/10/14
11
11/12/14
19
11/02/15
34
15/04/15
31
02/06/15
23
03/08/15
14
02/10/15
14
03/12/15
21
26/04/16
28.7
25/08/16
13.2
25/10/16
1.8
01/02/17
16.8
24/04/17
19.3
20/06/17
11.1
16/08/17
5.4
16/10/17
5.7
18/12/17
36
11/01/18
40
07/02/18
41
14/03/18
34
10/04/18
25
16/05/18
27
07/06/18
16
04/07/18
24
08/08/18
21
11/09/18
14
09/10/18
12
08/11/18
8.4
06/12/18
14
06/02/19
32
10/04/19
26
13/06/19
13
06/08/19
4.2
03/10/19
3.9
04/12/19
37
12/02/20
35
04/06/20
23
12/08/20
5.7
06/10/20
12
18/11/20
19
03/12/20
14
04/02/21
34
13/04/21
23
10/06/21
16
05/08/21
16
06/10/21
7.6
02/12/21
13
03/02/22
32
05/04/22
26
03/06/22
20
03/08/22
0.5
05/10/22
3
04/11/22
5.6
06/12/22
27
04/01/23
36
03/02/23
44
03/03/23
36
05/04/23
38
09/05/23
24
05/06/23
29
05/07/23
16
09/08/23
12
05/09/23
9.2
05/10/23
7.5