Douglas County Lake Quality
Nebraska, 12 lakes, average grade D (Poor)
Douglas County has 12 graded 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 2 lakes fall into the F bracket outright.
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 Qacpwrpltdup Lake (A); the most-stressed is Carter Lake Max Depth (F).
Quick Answers for Douglas County
Planning a trip? Check special fishing regulations for Qacpwrpltdup Lake — or check the official Nebraska fishing regulations.
All Lakes in Douglas County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Qacpwrpltdup Lake | A | - | 10 µg/L |
| 2 | Qacpwrpltfbk Lake | A | - | 8 µg/L |
| 3 | Qacnelakefbk | A | - | 11 µg/L |
| 4 | Qacnelakedup | D | - | 80 µg/L |
| 5 | Carter Lake Max Depth | F | 1.3 ft | 100 µg/L |
| 6 | Carter Lake | F | 3.2 ft | - |
Other Counties in Nebraska
See how Douglas 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 Douglas County
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Source: EPA National Aquatic Resource Surveys, 2026.