Smith Lake is a highly nutrient-loaded hypereutrophic lake in Sheridan County, Nebraska. Water quality is graded F based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Sheridan County, Smith Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Nebraska DNR, last sampled 2024-09-24. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.7 ft of visibility. Phosphorus level: 248 µg/L. Chlorophyll-a: 56.1 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.7 ft | F |
| Phosphorus | 248 µg/L | F |
| Chlorophyll-a (Algae) | 56.1 µg/L | F |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Smith Lake
Location
County Ranking
Ranked #2 of 2 lakes in Sheridan County
Cleaner Lakes Within 30 Miles
Smith Lake holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Sheridan County
Explore Smith Lake across LakeGrade
More Nebraska Lake Rankings
Other Grade F Lakes in Nebraska
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-24
Monitoring stations: 1