Lake Texoma is a productive, nutrient-rich eutrophic lake in Marshall County, Oklahoma. Water quality is graded D based on 2 sampling years through 2023.
Source: EPA Water Quality Portal sampling records, Oklahoma DNR, last sampled 2023-10-23. 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 1.7 ft of visibility. Phosphorus level: 130 µg/L. Chlorophyll-a: 23 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.7 ft | F |
| Phosphorus | 130 µg/L | F |
| Chlorophyll-a (Algae) | 23 µg/L | D |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Lake Texoma
Location
County Ranking
Ranked #1 of 1 lakes in Marshall County
Cleaner Lakes Within 30 Miles
Lake Texoma holds Grade D. 2 nearby lakes hold higher grades.
- CLake TexomaGrayson County · 12 mi · Higher grade (D → C)
- CLake TexomaBryan County · 15.9 mi · Higher grade (D → C)
Nearby Lakes in Marshall County
Explore Lake Texoma across LakeGrade
More Oklahoma Lake Rankings
Other Grade D Lakes in Oklahoma
Eutrophic Lakes in Oklahoma
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: 2023-10-23
Monitoring stations: 3