During the summer and fall of 2012, the Public Works staff surveyed and inventoried the Village's entire ash tree population and found a total of 2,473 ash trees. As part of the ash tree inventory, staff rated every tree in accordance with the Emerald Ash Borer (EAB) Policy. The rating system utilized by the Village is detailed below.
- Level 1 - Tree is showing some signs of EAB infestation but cannot be determined with reasonable certainty. Tree will be monitored on a quarterly to bi-annual basis.
- Level 3 - Tree is showing obvious signs of EAB infestation and will be monitored very closely. Tree will almost certainly die off completely within 1 to 2 years.
- Level 5 - Tree is almost or completely dead due to EAB infestation. Tree shows more than two obvious signs of EAB infestation and needs to be removed and/or replaced.
To date (2017), the Village has removed approximately 2,281 ash trees from the public right-of-ways and Village owned properties that were given a "Level 5" rating.