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LakeQuality
C

Gosper County Lake Quality

Nebraska, 2 lakes, average grade C (Fair)

Gosper County has 2 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. Gosper County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.

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. Elwood Reservoir (B) is the cleanest in the county.

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All Lakes in Gosper County

RankLakeGradeClarityPhosphorus
1Elwood ReservoirB10 ft-
2Johnson LakeC2.8 ft62.3 µg/L

See how Gosper 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 Gosper County

Top-rated places to stay near Gosper County

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Source: EPA National Aquatic Resource Surveys, 2026.