What is the water quality grade for Lake Amon G Carter?

Lake Amon G Carter in Montague County, Texas received a water quality grade of D (Poor). Water clarity: 2.3 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 40.1 µg/L.

Is Lake Amon G Carter safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Lake Amon G Carter has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 40.1 µg/L. Always check local health department advisories before swimming.

Montague County, Texas

Lake Amon G Carter

Grade DPoor · 2.3 ft clarity

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Eutrophic

Lake Amon G Carter is a productive, nutrient-rich eutrophic lake in Montague County, Texas. Water quality is graded D based on 2 sampling years through 2025.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-08-06. 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 2.3 ft of visibility. Phosphorus level: 40 µg/L. Chlorophyll-a: 40.1 µg/L. Trophic State Index: 63.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.3 ft	F
Phosphorus	40 µg/L	C
Chlorophyll-a (Algae)	40.1 µg/L	F
Trophic State Index (TSI)	63	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Lake Amon G Carter

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