Greer County Lake Quality
Oklahoma, 1 lakes, average grade (Not rated)
Only 1 lakes in Greer 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.
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. Altus Reservoir (—) is the cleanest in the county.
Quick Answers for Greer County
Planning a trip? Check special fishing regulations for Altus Reservoir — or check the official Oklahoma fishing regulations.
All Lakes in Greer County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Altus Reservoir | 1.6 ft | - |
Other Counties in Oklahoma
See how Greer 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 Greer County
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Source: EPA National Aquatic Resource Surveys, 2026.