RAU DE LA BELLE PERCHE A LANGON, paramètre Nitrates
mg(NO3)/L
16/02/21
25.8
01/03/21
24
07/04/21
20
11/05/21
16.2
22/06/21
12.5
29/09/21
15.9
21/10/21
12
30/11/21
14
04/01/22
21.7
23/03/22
12.3
08/04/22
10
23/05/22
8.4
28/09/22
8.7
24/10/22
11.8
16/11/22
8.8
28/12/22
37.7