Year
|
River nitrate 1992-2021 (640) (secondary axis)
|
River nitrate 2000-2021 (1,006) (secondary axis)
|
Groundwater nitrate 1992-2021 (475)
|
Groundwater nitrate 2000-2021 (1,025)
|
1992
|
2.35
|
|
19.7
|
|
1993
|
2.24
|
|
19.55
|
|
1994
|
2.12
|
|
19.69
|
|
1995
|
2.08
|
|
20.19
|
|
1996
|
2.17
|
|
20.11
|
|
1997
|
2.27
|
|
20.95
|
|
1998
|
2.3
|
|
20.91
|
|
1999
|
2.07
|
|
20.62
|
|
2000
|
2.16
|
1.88
|
20.93
|
20.65
|
2001
|
2.2
|
1.92
|
20.44
|
20.49
|
2002
|
2.13
|
1.89
|
19.97
|
20.04
|
2003
|
2.06
|
1.84
|
20.47
|
20.34
|
2004
|
2.22
|
1.96
|
20.49
|
20.19
|
2005
|
2.08
|
1.87
|
20.04
|
20.29
|
2006
|
2.16
|
1.94
|
19.85
|
20.37
|
2007
|
2.12
|
1.87
|
20.54
|
20.7
|
2008
|
2.03
|
1.78
|
21.2
|
20.85
|
2009
|
1.91
|
1.71
|
21.12
|
20.55
|
2010
|
1.99
|
1.78
|
21.05
|
20.87
|
2011
|
1.89
|
1.69
|
19.89
|
20.06
|
2012
|
1.84
|
1.66
|
21.13
|
20.64
|
2013
|
1.99
|
1.78
|
20.48
|
20.63
|
2014
|
1.92
|
1.72
|
20.3
|
20.79
|
2015
|
1.88
|
1.69
|
20.37
|
20.91
|
2016
|
1.87
|
1.62
|
20.39
|
21.27
|
2017
|
1.87
|
1.64
|
20.08
|
20.59
|
2018
|
1.76
|
1.59
|
20.93
|
20.61
|
2019
|
1.96
|
1.7
|
20.6
|
20.28
|
2020
|
1.84
|
1.6
|
20.7
|
20.03
|
2021
|
2.02
|
1.71
|
20.86
|
20.13
|