Columbiana County Lake Quality
Ohio, 2 lakes, average grade D (Poor)
Only 2 lakes in Columbiana 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 grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.
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. Salem Reservoir (D) is the cleanest in the county.
Quick Answers for Columbiana County
Planning a trip? Check special fishing regulations for Salem Reservoir — or check the official Ohio fishing regulations.
All Lakes in Columbiana County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Salem Reservoir | D | - | 116.1 µg/L |
| 2 | Spring Valley Lake Lake | F | - | 396.5 µg/L |
Other Counties in Ohio
See how Columbiana County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 36 states and 2 Canadian provinces.
Where to stay near Columbiana County
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Source: EPA National Aquatic Resource Surveys, 2026.