What is the water quality grade for Graham-Mebane Reservoir?

Graham-Mebane Reservoir in Alamance County, North Carolina received a water quality grade of D (Poor). Water clarity: 2.3 ft visibility. Phosphorus: 50 µg/L. Chlorophyll-a (algae): 44 µg/L.

Is Graham-Mebane Reservoir safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Graham-Mebane Reservoir has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 44 µg/L. Always check local health department advisories before swimming.

Alamance County, North Carolina

Graham-Mebane Reservoir

Grade DPoor · 2.3 ft clarity

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Eutrophic

Graham-Mebane Reservoir is a productive, nutrient-rich eutrophic lake in Alamance County, North Carolina. Water quality is graded D based on 3 sampling years through 2023. Compared to the 1 other monitored lakes in Alamance County, Graham-Mebane Reservoir ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, North Carolina DNR, last sampled 2023-09-11. 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: 50 µg/L. Chlorophyll-a: 44 µg/L. Trophic State Index: 64.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.3 ft	F
Phosphorus	50 µg/L	C
Chlorophyll-a (Algae)	44 µg/L	F
Trophic State Index (TSI)	64	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Graham-Mebane Reservoir

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