Maps showing newly infested counties:

• 2021
• 2020
• 2019
• 2018
• 2017
• 2016
• 2015
• 2014
• 2013
• 2012
• 2011
• 2010
• 2009
• 2008
• 2007
• 2006
• 2005
• 2004
• 2003
• 2002
• 2001
• 2000
• 1999
• 1998
• 1997

Excel list of HWA infested counties 

Excel list of HWA infested areas in Canada

Progression of infestations over a time span:

• 1951-2021 – Years of infestation

• 1951-2021 – Decade infested