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Level III Ecoregions of Pennslyvania

Revised March 1999
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of Pennslyvania region 58   58. Northeastern Highlands
region 60   60. Northern Appalachian Plateau and Uplands
region 61   61. Erie Drift Plains
region 62   62. North Central Appalachians
region 67   67. Ridge and Valley
region 69   69. Central Appalachians
region 70   70. Western Allegheny Plateau
region 83   83. Eastern Great Lakes and Hudson Lowlands