What is the water quality grade for Impoundment Lake?

Impoundment Lake in Bexar County, Texas received a water quality grade of C (Fair). Phosphorus: 50 µg/L. Chlorophyll-a (algae): 37.2 µg/L.

Is Impoundment Lake safe to swim in?

Swim with caution, moderate algae may be present. Impoundment Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 37.2 µg/L. Always check local health department advisories before swimming.

Bexar County, Texas

Impoundment Lake

Grade CFair water quality

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Eutrophic

Impoundment Lake is a productive, nutrient-rich eutrophic lake in Bexar County, Texas. Water quality is graded C based on 2 sampling years through 2022. Compared to the 1 other monitored lakes in Bexar County, Impoundment Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2022-04-12. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

Water Quality Grade: C, Fair

No clarity data. Phosphorus level: 50 µg/L. Chlorophyll-a: 37.2 µg/L. Trophic State Index: 63.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No data
Phosphorus	50 µg/L	C
Chlorophyll-a (Algae)	37.2 µg/L	D
Trophic State Index (TSI)	63	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Impoundment Lake

Compare lakeside cabins, hotels, and vacation rentals near Impoundment Lake in Bexar County, Texas — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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