Atchison County Lake Quality
Kansas, 5 lakes, average grade F (Very Poor)
Only 5 lakes in Atchison 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 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 Atchison Co State Fishing Lake (D); the most-stressed is Lake Warnock (F).
Quick Answers for Atchison County
Planning a trip? Check special fishing regulations for Atchison Co State Fishing Lake — or check the official Kansas fishing regulations.
All Lakes in Atchison County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Atchison Co State Fishing Lake | D | 2.8 ft | 43.5 µg/L |
| 2 | Nla Lake | D | 0.6 ft | 261000 µg/L |
| 3 | Atchison County Park Lake | D | 1.2 ft | 280 µg/L |
| 4 | Lake Warnock | F | 1.7 ft | 509.5 µg/L |
Other Counties in Kansas
See how Atchison 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 Atchison County
Top-rated places to stay near Atchison County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Atchison County?
Get lake water-quality report cards plus the best cabin & lodging deals near Atchison County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.