The ash trees here do not have Emerald Ash Borer. The maple trees have a leaf malady called tar spot. It only affects parts of the leaves and does not kill the tree. Many maples throughout the city are showing some signs of stress. I suspect folks are using too much broadleaf weed killer on their lawns which can affect the maple trees, or they are using a weed killer with a herbicide that does readily negatively affect maples such as Dicamba.