FESSARD à ROEZE-SUR-SARTHE, paramètre Nitrates
mg(NO3)/L
21/02/13
26.2
10/04/13
16.9
24/06/13
4.8
26/02/14
3.1
28/08/14
17
27/10/14
21
03/12/14
22
10/02/16
17.2
22/04/16
23.5
08/06/16
21.2
25/08/16
22.8
21/10/16
23.6
12/12/16
22.3