Why are the Adirondack Mountains vulnerable to acid rain?

The Adirondack Mountains are particularly vulnerable to acid rain primarily due to the region's geological composition. The area is underlain by slowly weathering bedrock, which results in soils that possess a low buffering capacity, or low acid-neutralizing capacity.12

Because these soils lack significant amounts of base cations—such as calcium and magnesium—they are unable to effectively neutralize the acidity introduced by wet and dry deposition. When this natural buffering capacity is overwhelmed, the soil chemistry is altered, leading to the leaching of nutrients and the mobilization of toxic aluminum. This process negatively impacts local ecosystems, including the health of forests and the survival of fish populations in lakes and streams. Additionally, the region can experience "acid shocks" during events like snowmelt, where accumulated pollutants are released in a concentrated pulse, further stressing the environment.32451