Eutrophic Lakes in Pennsylvania
3 eutrophic lakes in Pennsylvania. High nutrients, frequent algae, reduced clarity.
A eutrophic lake is a productive ecosystem with the trade-offs that come with productivity: more food at the base of the food web, more clarity reduction by mid-summer, more dissolved-oxygen variability near the bottom. 3 Pennsylvania lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.
Eutrophic lakes typically grade C or D on the LakeGrade rubric. The same nutrient richness that defines the trophic class drives the lower grade.
| # | Lake | County | Grade | Clarity | Depth | TSI |
|---|---|---|---|---|---|---|
| 1 | Lake Wallenpaupack | Pike | D | 5.7 ft | - | 52 |
| 2 | Lake Carey | Wyoming | D | 5.9 ft | - | 52 |
| 3 | Lake Nockamixon | Bucks | D | 4.8 ft | - | 55 |
All eutrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →All Pennsylvania lakes →
Source: EPA National Aquatic Resource Surveys, 2026.