Okmulgee County Lake Quality
Oklahoma, 2 lakes, average grade C (Fair)
Only 2 lakes in Okmulgee 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 average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
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 Nla Lake (C); the most-stressed is Nla Lake (D).
Quick Answers for Okmulgee County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Oklahoma fishing regulations.
All Lakes in Okmulgee County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | C | 0.4 ft | 29.8 µg/L |
| 2 | Nla Lake | D | 0.6 ft | 150000 µg/L |
Other Counties in Oklahoma
See how Okmulgee 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 Okmulgee County
Top-rated places to stay near Okmulgee County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Okmulgee County?
Get lake water-quality report cards plus the best cabin & lodging deals near Okmulgee County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.