Gage County Lake Quality
Nebraska, 4 lakes, average grade D (Poor)
Gage County has 4 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. On average, Gage 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 Nla Lake (C); the most-stressed is Nla Lake (F).
Quick Answers for Gage County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Nebraska fishing regulations.
All Lakes in Gage County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | C | 0.3 ft | 697000 µg/L |
| 2 | Rockford Lake | D | 1.7 ft | 328 µg/L |
| 3 | Nla Lake | F | 0.5 ft | 1399000 µg/L |
| 4 | Big Indian Lake | F | 1.5 ft | 255 µg/L |
Other Counties in Nebraska
See how Gage 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 Gage County
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Source: EPA National Aquatic Resource Surveys, 2026.