Shawnee County Lake Quality
Kansas, 5 lakes, average grade D (Poor)
Only 5 lakes in Shawnee 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-wide average grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.
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 (B) is the cleanest in the county.
Quick Answers for Shawnee County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Kansas fishing regulations.
All Lakes in Shawnee County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | B | 4.9 ft | 17.9 µg/L |
| 2 | Shawnee Co State Fishing Lake | C | 4.3 ft | - |
| 3 | Lake Shawnee | C | 4.6 ft | 31 µg/L |
| 4 | Nla Lake | D | 4 ft | 28000 µg/L |
| 5 | Central Park Lake | F | 1.2 ft | 325 µg/L |
Other Counties in Kansas
See how Shawnee 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 Shawnee County
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Source: EPA National Aquatic Resource Surveys, 2026.