Mayes County Lake Quality
Oklahoma, 6 lakes, average grade D (Poor)
Only 6 lakes in Mayes 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. On average, Mayes County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Spavinaw Lake (C); the most-stressed is Spavinaw Lake (C).
Quick Answers for Mayes County
Planning a trip? Check special fishing regulations for Spavinaw Lake — or check the official Oklahoma fishing regulations.
All Lakes in Mayes County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Spavinaw Lake | C | 3.3 ft | 41 µg/L |
Other Counties in Oklahoma
See how Mayes County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Mayes County
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Source: EPA National Aquatic Resource Surveys, 2026.