SEVRE NIORTAISE A LA MOTHE-ST-HERAY, paramètre Nitrates
mg(NO3)/L
13/01/16
37.8
03/02/16
36.6
09/03/16
36.5
06/04/16
36.2
11/05/16
33.4
08/06/16
37
20/07/16
35.6
03/08/16
32.8
05/10/16
31.5
01/12/16
31.4
07/12/16
31.5