LAYON à CHAUDEFONDS-SUR-LAYON, paramètre Demande Biochimique en oxygène en 5 jours (D.B.O.5) mg(O2)/L

27/03/13
2.1
25/04/13
3.2
25/06/13
2.1
12/07/13
2.7
29/08/13
4.3
23/09/13
3.6
28/10/13
2.5
15/11/13
3.1
16/12/13
2.5
09/04/14
5.9
25/04/14
6.2
27/05/14
2.8
12/06/14
1.8
31/07/14
2.4
08/08/14
1.9
25/09/14
1.7
30/10/14
2
21/11/14
2.6
19/12/14
3
09/01/15
2.5
17/02/15
3.7
20/03/15
3.1
29/04/15
5.3
28/05/15
3.4
10/06/15
2.3
23/07/15
3.3
27/08/15
1.3
23/09/15
1.7
21/10/15
1.6
19/11/15
1.7
04/12/15
1.9
30/10/18
2
21/12/18
2.9
26/02/19
1.4
24/04/19
3.4
21/06/19
2.3
21/08/19
2
30/10/19
2.1
21/10/22
0.8
23/11/22
0.8
20/12/22
2.2
20/02/23
2.4
20/03/23
2.7
20/04/23
6
25/05/23
2.1
20/06/23
3.2
24/07/23
2.6
25/08/23
1.7
19/09/23
2.1