What is the water quality grade for Twin Buttes Reservoir?

Twin Buttes Reservoir in Tom Green County, Texas received a water quality grade of C (Fair). Water clarity: 1.2 ft visibility. Phosphorus: 35 µg/L. Chlorophyll-a (algae): 32.6 µg/L.

Is Twin Buttes Reservoir safe to swim in?

Swim with caution, moderate algae may be present. Twin Buttes Reservoir has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 32.6 µg/L. Always check local health department advisories before swimming.

Tom Green County, Texas

Twin Buttes Reservoir

Grade CFair · 1.2 ft clarity

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Eutrophic

Twin Buttes Reservoir is a productive, nutrient-rich eutrophic lake in Tom Green County, Texas. Water quality is graded C based on 2 sampling years through 2021. Compared to the 5 other monitored lakes in Tom Green County, Twin Buttes Reservoir ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2021-09-20. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

Water Quality Grade: C, Fair

Very murky, less than 1.2 ft of visibility. Phosphorus level: 35 µg/L. Chlorophyll-a: 32.6 µg/L. Trophic State Index: 65.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.2 ft	F
Phosphorus	35 µg/L	C
Chlorophyll-a (Algae)	32.6 µg/L	D
Trophic State Index (TSI)	65	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Twin Buttes Reservoir

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