Submitted by on 26 October 2015 UK Ammonia Network 2007 Ammonia concentration (NH3) 2006 Ammonia concentration (NH3) 2005 Ammonia concentration (NH3) 2004 Ammonia concentration (NH3) 2003 Ammonia concentration (NH3) 2002 Ammonia concentration (NH3) 2001 Ammonia concentration (NH3) 2000 Ammonia concentration (NH3) 1999 Ammonia concentration (NH3) 1998 Ammonia concentration (NH3) 1997 Ammonia concentration (NH3)