Tulsa County Lake Quality
Oklahoma, 1 lakes, average grade D (Poor)
Only 1 lakes in Tulsa 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, Tulsa County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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. Nla Lake (D) is the cleanest in the county.
Quick Answers for Tulsa County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Oklahoma fishing regulations.
All Lakes in Tulsa County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | D | 3.4 ft | 52577.4 µg/L |
Other Counties in Oklahoma
See how Tulsa 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 Tulsa County
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Source: EPA National Aquatic Resource Surveys, 2026.