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

07/02/13
2.6
24/04/13
2.8
11/06/13
2
17/12/13
5.7
19/02/14
2.1
11/04/14
2.4
11/06/14
2.1
06/08/14
2.8
23/10/14
5
23/12/14
5.3
17/02/15
4.9
29/04/15
3
09/06/15
1.7
27/08/15
4.7
20/10/15
4.1
04/12/15
4.4
19/02/16
1.8
11/04/16
2.2
16/06/16
2.3
10/10/16
0.8
16/12/16
2
06/02/17
1.2
18/04/17
1.6
29/06/17
5.4
10/01/18
3.1
23/02/18
3.8
21/03/18
2
25/04/18
1.8
24/05/18
1.1
26/06/18
2.6
17/07/18
2.1
07/08/18
1.5
20/09/18
0.9
08/10/18
3.6
07/11/18
4.5
05/12/18
2.5
22/02/19
2.2
24/04/19
3.3
21/06/19
3.5
23/12/19
2.5
25/02/20
1.6
13/11/20
1.3
18/12/20
1.5
26/02/21
1.7
29/04/21
5.6
21/12/21
2.2
21/02/22
0.5
22/04/22
2.2
19/01/23
1.1
20/02/23
1.4
20/03/23
4
20/04/23
2.1
25/05/23
1.6
20/06/23
5.7
24/07/23
1.9
25/08/23
2.3
19/09/23
2.5
25/10/23
20.9