Shawnee County Lake Quality
Kansas, 3 lakes, average grade F (Algae-prone)
Shawnee County holds 3 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 1 of those lake carry an A–F grade. The county-level summary describes that subset, not every water body listed. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
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 Central Park Lake (F); the most-stressed is Central Park Lake (F).
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Quick Answers for Shawnee County
Planning a trip? Check special fishing regulations for Central Park Lake — or check the official Kansas fishing regulations.
All Lakes in Shawnee County
3 lakes · 1 graded, 2 not rated1 graded lake · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | FCentral Park LakeShawnee | F | 1.2 ft | 325 µg/L | 105 µg/L | No recent samples | Not recorded |
| NRLake ShawneeShawnee | NR | 4.6 ft | 31 µg/L | 20.5 µg/L | No recent samples | ✓ Public | |
| NRShawnee Co State Fishing LakeShawnee | NR | 4.3 ft | 20 µg/L | 11.5 µg/L | No recent samples | Not recorded |
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 Kansas
See how Shawnee 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.