What is the water quality grade for Cofc Lake?

Cofc Lake in Marengo County, Alabama received a water quality grade of C (Fair). Water clarity: 2 ft visibility. Phosphorus: 32.5 µg/L. Chlorophyll-a (algae): 16.5 µg/L.

Is Cofc Lake safe to swim in?

Swim with caution, moderate algae may be present. Cofc Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 16.5 µg/L. Always check local health department advisories before swimming.

Marengo County, Alabama

Cofc Lake

Grade CFair · 2 ft clarity

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Eutrophic

Cofc Lake is a productive, nutrient-rich eutrophic lake in Marengo County, Alabama. Water quality is graded C based on 2 sampling years through 2025. Compared to the 2 other monitored lakes in Marengo County, Cofc Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Alabama DNR, last sampled 2025-10-27. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

Water Quality Grade: C, Fair

Very murky, less than 2 ft of visibility. Phosphorus level: 32.5 µg/L. Chlorophyll-a: 16.5 µg/L. Trophic State Index: 60.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2 ft	F
Phosphorus	32.5 µg/L	C
Chlorophyll-a (Algae)	16.5 µg/L	C
Trophic State Index (TSI)	60	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Cofc Lake

Compare lakeside cabins, hotels, and vacation rentals near Cofc Lake in Marengo County, Alabama — 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.

Top-rated places to stay near Cofc Lake