Lake Alan Henry is a productive, nutrient-rich eutrophic lake in Garza County, Texas. Water quality is graded B based on 2 sampling years through 2025.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-11-03. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 9.4 ft. Phosphorus level: 91.4 µg/L. Chlorophyll-a: 2.6 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.4 ft | B |
| Phosphorus | 91.4 µg/L | D |
| Chlorophyll-a (Algae) | 2.6 µg/L | A |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Lake Alan Henry
Location
County Ranking
Ranked #1 of 1 lakes in Garza County
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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: 2025-11-03
Monitoring stations: 1