Carroll County Lake Quality
Ohio, 5 lakes — no lake here has enough monitoring data for a grade
Carroll County holds 5 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. No lake in Carroll County has enough sampling behind it for an A–F grade yet. The 5 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.
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Quick Answers for Carroll County
Planning a trip? Check special fishing regulations for Leesville Lake — or check the official Ohio fishing regulations.
All Lakes in Carroll County
5 lakes · 0 graded, 5 not rated0 graded lakes · 5 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRLeesville LakeCarroll | NR | 5 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRAtwood LakeCarroll | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRLeesville LakeCarroll | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake MohawkCarroll | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGreat Trails Girl Scouts PondCarroll | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Ohio
See how Carroll County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.