Year Sulphur-dioxide (SO2) Nitrogen-dioxide (NO2)
Budapesta Miskolcb Székesfehérvárc Budapestd Miskolcb Székesfehérvárd
1985 39.8 35.4 23.7 49.6 27.4 30.7
1986 24.2 24.9 14.5 48.3 25.8 25.7
1987 18.7 44.6 19.5 28.1 33.1 29.5
1988 13.4 25.7 20.4 25.3 30.7 30.8
1989 17.3 20.3 22.4 39.8 28.0 24.6
1990 12.8 25.9 19.3 36.8 25.6 46.2
1991 17.4 52.0 12.4 44.6 28.9 47.1
1992 15.3 54.3 16.4 48.0 34.0 44.7
1993 20.1 33.3 9.5 52.0 31.2 33.9
1994 22.6 33.8 22.0 57.5 33.3 50.3
1995 19.1 37.5 22.6 49.6 29.0 46.5
1996 24.2 42.6 24.4 48.3 31.0 43.1
1997 20.0 25.4 24.4 36.0 30.2 31.1
1998 20.5 21.6 20.9 34.9 26.3 33.7
1999 16.6 36.4 17.5 40.3 31.7 50.8
2000 19.5 20.0 12.1 40.5 28.3 42.6
2001 18.2 15.3 14.1 39.5 26.9 42.5
2002 11.0 7.4 6.7 34.6 27.6 38.6
2003 1.8 15.2 5.2 56.2 35.3 43.1
2004 1.3 6.3 2.9 50.1 40.1 34.5
2005 1.1 4.0 0.7 56.4 36.5 41.7
2006 1.0 6.8 0.6 48.2 34.2 34.6
2007 1.0 6.7 0.5 36.7 39.6 38.7
2008 4.5 6.7 .. 39.2 37.9 30.2
2009 6.0 8.1 .. 34.5 36.7 27.8
2010 6.3 9.1 .. 41.9 35.2 24.0
2011 5.8 8.7 .. 41.7 33.9 16.1
2012 5.8 11.1 .. 41.0 25.0 12.2
2013 .. 10.4 .. 50.2 22.9 22.0
2014 4.9 9.4 .. 50.9 22.4 21.0
2015 4.4 7.2 .. 32.4 23.6 20.6
2016 4.0 7.9 2.6 32.4 22.0 19.3
2017 5.3 9.3 3.6 34.1 26.3 21.7
2018 4.5 7.8 3.3 31.7 22.3 20.8
2019 3.9 7.8 2.3 30.1 22.7 25.7
2020 4.5 7.5 4.3 26.0 19.4 20.8

Footnotes

*
Source: Hungarian Meteorological Service Observation Department Air Quality Reference Centre.
a
From 2008 according to the data of the monitoring network.
b
From 2007 according to the data of the monitoring network.
c
From 2016 according to the data of the monitoring network.
d
From 2015 according to the data of the monitoring network.
.