Lake Coleman is a productive, nutrient-rich eutrophic lake in Coleman County, Texas. Water quality is graded B based on 2 sampling years through 2025. Compared to the 1 other monitored lakes in Coleman County, Lake Coleman ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-11-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 3.9 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 9.6 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | D |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | 9.6 µg/L | C |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Coleman
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Fishing Lake Coleman
Location
County Ranking
Ranked #1 of 2 lakes in Coleman County
Nearby Lakes in Coleman County
Explore Lake Coleman across LakeGrade
More Texas Lake Rankings
Other Grade B Lakes in Texas
Eutrophic Lakes in Texas
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: 2025-11-17
Monitoring stations: 1