LE BLANC A SAINT-LAURENT-SUR-SEVRE, paramètre Nitrates
mg(NO3)/L
30/03/20
34
23/04/20
30
20/05/20
25
29/06/20
18
29/09/20
11
30/10/20
27
01/11/20
31
23/12/20
38
18/01/21
36
09/02/21
30
08/03/21
30
15/04/21
26
10/05/21
18
07/06/21
19
12/07/21
18
16/08/21
22
11/10/21
17
08/11/21
13
06/12/21
21