Garfield County Lake Quality
Nebraska, 1 lakes, average grade D (Poor)
Only 1 lakes in Garfield 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. On average, Garfield County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Calamus Reservoir (D) is the cleanest in the county.
Quick Answers for Garfield County
Planning a trip? Check special fishing regulations for Calamus Reservoir — or check the official Nebraska fishing regulations.
All Lakes in Garfield County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Calamus Reservoir | D | 3.6 ft | 124.5 µg/L |
Other Counties in Nebraska
See how Garfield County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
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Source: EPA National Aquatic Resource Surveys, 2026.