What is the water quality grade for Wright Patman Lake?

Wright Patman Lake in Bowie County, Texas received a water quality grade of D (Poor). Water clarity: 2.2 ft visibility. Phosphorus: 60 µg/L. Chlorophyll-a (algae): 24 µg/L.

Is Wright Patman Lake safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Wright Patman Lake has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 24 µg/L. Always check local health department advisories before swimming.

Bowie County, Texas · 33.32°N

Wright Patman Lake

Grade DPoor · 2.2 ft clarity

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Eutrophic

Wright Patman Lake is a productive, nutrient-rich eutrophic lake in Bowie County, Texas. Water quality is graded D based on 2 sampling years through 2025. Compared to the 1 other monitored lakes in Bowie County, Wright Patman Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-09-15. 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 2.2 ft of visibility. Phosphorus level: 60 µg/L. Chlorophyll-a: 24 µg/L. Trophic State Index: 64.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.2 ft	F
Phosphorus	60 µg/L	D
Chlorophyll-a (Algae)	24 µg/L	D
Trophic State Index (TSI)	64	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Wright Patman Lake

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