What is the water quality grade for Amistad Reserv Rio Grande Arm Lake?

Amistad Reserv Rio Grande Arm Lake in Val Verde County, Texas received a water quality grade of B (Good). Water clarity: 5.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.1 µg/L.

Is Amistad Reserv Rio Grande Arm Lake safe to swim in?

Good for swimming, clear water with low algae levels. Amistad Reserv Rio Grande Arm Lake has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 6.1 µg/L. Always check local health department advisories before swimming.

Val Verde County, Texas

Amistad Reserv Rio Grande Arm Lake

Grade BGood · 5.2 ft clarity

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Mesotrophic

Amistad Reserv Rio Grande Arm Lake 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 Reserv Rio Grande Arm Lake ranks #2 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

Murky, only visible to about 5.2 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 6.1 µg/L. Trophic State Index: 50.

Metric	Value	Grade
Water Clarity (Secchi Depth)	5.2 ft	C
Phosphorus	20 µg/L	B
Chlorophyll-a (Algae)	6.1 µg/L	B
Trophic State Index (TSI)	50	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Amistad Reserv Rio Grande Arm Lake

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