Harmon County, Oklahoma · Water Quality Report Card
Hall Lake
Hall Lake in Harmon County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.4 ft visibility.
- Clarity
- 2.4 ft
- Type
- Eutrophic
Hall Lake is a productive, nutrient-rich eutrophic lake in Harmon County, Oklahoma.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2020-08-31. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Very murky, less than 2.4 ft of visibility. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hall Lake
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Fishing Hall Lake
Location
Nearby Lakes in Harmon County
Explore Hall Lake across LakeGrade
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Other Lakes in Oklahoma
Eutrophic Lakes in Oklahoma
More records, surveys & data sources
Where this data comes from
12 measurements from 3 monitoring stations, 2019–2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX12 samples · 2019–2020
Analytical methods
- OWRB Lakes Field Data Collection
- Determination of Turbidity
Monitoring station identifiers (3)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-08-31
Monitoring stations: 3