Harlan County Reservoir is a productive, nutrient-rich eutrophic lake in Harlan County, Nebraska. Water quality is graded D based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Harlan County, Harlan County Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Nebraska DNR, last sampled 2024-08-19. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.8 ft of visibility. Phosphorus level: 201 µg/L. Chlorophyll-a: 12.6 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | F |
| Phosphorus | 201 µg/L | F |
| Chlorophyll-a (Algae) | 12.6 µg/L | C |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Harlan County Reservoir
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Fishing Harlan County Reservoir
Location
County Ranking
Ranked #1 of 2 lakes in Harlan County
Nearby Lakes in Harlan County
Explore Harlan County Reservoir across LakeGrade
More Nebraska Lake Rankings
Other Grade D Lakes in Nebraska
Eutrophic 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: 2024-08-19
Monitoring stations: 2