Pawnee County Lake Quality
Oklahoma, 7 lakes — no lake here has enough monitoring data for a grade
Pawnee County holds 7 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. No lake in Pawnee County has enough sampling behind it for an A–F grade yet. The 7 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
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.
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Quick Answers for Pawnee County
Planning a trip? Check special fishing regulations for Keystone Lake — or check the official Oklahoma fishing regulations.
All Lakes in Pawnee County
7 lakes · 0 graded, 7 not rated0 graded lakes · 7 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRKeystone LakePawnee | NR | 1.9 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRCleveland City LakePawnee | NR | 1.6 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRPawnee LakePawnee | NR | 1.6 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLone Chimney LakePawnee | NR | 2.2 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSooner ReservoirPawnee | NR | 4 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRMaramec LakePawnee | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRKeystone LakePawnee | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Oklahoma
See how Pawnee County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.