Harrison County Lake Quality
Indiana, 1 lakes, average grade B (Good)
Only 1 lakes in Harrison 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-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
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 Harrison County
All Lakes in Harrison County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|
Other Counties in Indiana
See how Harrison 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.