Cofc Lake
Marengo County, AlabamaView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- #2 of 2 in the county
- Public access
Cofc Lake in Marengo County, Alabama has a water quality grade of C (Fair). Water clarity: 2 ft visibility. Phosphorus: 32.5 µg/L. Chlorophyll-a (algae): 16.5 µg/L.
- Clarity
- 2 ft
- Type
- Eutrophic
- Phosphorus
- 32.5 µg/L
- Chlorophyll-a
- 16.5 µg/L
- Public access
- Yes
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Watch Cofc Lake’s letter
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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. Limited fish-species data available. Public access is available. Compared to the 1 other monitored lakes in Marengo County, Cofc Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, ADEM, last sampled 2025-10-27. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyAlgae risk
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Very murky, less than 2 ft of visibility. Phosphorus 32.5 µg/L. Chlorophyll-a 16.5 µg/L. TSI 60. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 32.5 µg/L | Good |
| Chlorophyll-a (Algae) | 16.5 µg/L | Fair |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Cofc Lake
County Ranking
Ranked #2 of 2 lakes in Marengo County
Nearby Lakes With Higher Grades
Cofc Lake holds Grade C. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Marengo County
Frequently asked questions about Cofc Lake
Where is Cofc Lake?
- Cofc Lake is a lake in Marengo County, Alabama. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Cofc Lake?
- Cofc Lake in Marengo County, Alabama has 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?
- The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Cofc Lake across LakeQuality
More Alabama Lake Rankings
Other Grade C Lakes in Alabama
Where this data comes from
152 measurements from 2 monitoring stations, 2014–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- ALABAMA DEPT. OF ENVIRONMENTAL MANAGEMENT - WATER QUALITY DATA
21AWIC152 samples · 2014–2025
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 2120 B ~ Color in Water by Visual Comparison
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.