Jennings County Lake Quality
Indiana, 2 lakes, average grade F (Very Poor)
Only 2 lakes in Jennings County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is a leading lake (—); the most-stressed is a stressed lake (—).
Quick Answers for Jennings County
All Lakes in Jennings County
| Rank | Lake | Grade | Clarity | Phosphorus |
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Other Counties in Indiana
See how Jennings County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
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Source: EPA National Aquatic Resource Surveys, 2026.