What is the water quality grade for Amistad Reservoir?

Amistad Reservoir in Val Verde County, Texas received a water quality grade of B (Good). Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 3.5 µg/L.

Is Amistad Reservoir safe to swim in?

Good for swimming, clear water with low algae levels. Amistad Reservoir has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 3.5 µg/L. Always check local health department advisories before swimming.

Val Verde County, Texas

Amistad Reservoir

Grade BGood · 8.2 ft clarity

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Mesotrophic

Amistad Reservoir is a mesotrophic lake in Val Verde County, Texas. Water quality is graded B based on 2 sampling years through 2023. Compared to the 2 other monitored lakes in Val Verde County, Amistad Reservoir ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2023-04-26. 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 8.2 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 3.5 µg/L. Trophic State Index: 46.

Metric	Value	Grade
Water Clarity (Secchi Depth)	8.2 ft	C
Phosphorus	20 µg/L	B
Chlorophyll-a (Algae)	3.5 µg/L	B
Trophic State Index (TSI)	46	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Amistad Reservoir

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