Butler County Lake Quality
Kansas, 5 lakes, average grade D (Nutrient-rich)
Butler County has 5 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. 3 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Butler County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 El Dorado Lake (C); the most-stressed is Augusta City Lake (F).
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Quick Answers for Butler County
Planning a trip? Check special fishing regulations for El Dorado Lake — or check the official Kansas fishing regulations.
All Lakes in Butler County
5 lakes · 3 graded, 2 not rated3 graded lakes · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | CEl Dorado LakeButler | C | 2.8 ft | 34 µg/L | 14.3 µg/L | No recent samples | ✓ Public |
| 2 | FAugusta City LakeButler | F | 1.5 ft | 180 µg/L | 48.5 µg/L | No recent samples | Not recorded |
| 3 | FAugusta Santa Fe LakeButler | F | 1 ft | 195 µg/L | 42.9 µg/L | No recent samples | Not recorded |
| NRButler Co State Fishing LakeButler | NR | 2.1 ft | 120 µg/L | 33 µg/L | No recent samples | ✓ Public | |
| NRFox LakeButler | NR | No recent samples | No recent samples | No recent samples | 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 Butler 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.