RUISSEAU DE LONGUENAIS A LES HERBIERS, paramètre Nitrites
mg(NO2)/L
25/07/16
0.14
23/08/16
0.07
27/09/16
0.04
24/10/16
0.49
25/11/16
0.26
20/12/16
0.04
14/01/20
0.14
11/02/20
0.13
10/03/20
0.1
25/05/20
0.54
22/06/20
0.55