Ducc Lake
Cullman County, AlabamaView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- #1 of 2 in the county
Ducc Lake in Cullman County, Alabama has a water quality grade of D (Nutrient-rich). Water clarity: 4.1 ft visibility. Phosphorus: 31 µg/L. Chlorophyll-a (algae): 19.2 µg/L.
- Clarity
- 4.1 ft
- Type
- Eutrophic
- Phosphorus
- 31 µg/L
- Chlorophyll-a
- 19.2 µg/L
- Trend
- ↑ Improving
Stays via Stay22
Stays near Ducc Lake
Compare lakeside cabins, hotels, and vacation rentals near Ducc Lake in Cullman 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Ducc Lake are listed below.
Top-rated places to stay near Ducc Lake
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Watch Ducc Lake’s letter
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Ducc Lake is a productive, nutrient-rich eutrophic lake in Cullman County, Alabama. Water quality is graded D based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 1 other monitored lakes in Cullman County, Ducc Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, ADEM, last sampled 2024-09-18. 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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 4.1 ft. Phosphorus 31 µg/L. Chlorophyll-a 19.2 µg/L. TSI 57. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.1 ft | Not graded |
| Phosphorus | 31 µg/L | Fair |
| Chlorophyll-a (Algae) | 19.2 µg/L | Poor |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Ducc Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.057 m/yr | 3 |
| Phosphorus | ↑ Improving | -1.83 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -1.24 µg/L/yr | 3 |
County Ranking
Ranked #1 of 2 lakes in Cullman County
Nearby Lakes With Higher Grades
Ducc Lake holds Grade D. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Cullman County
Frequently asked questions about Ducc Lake
Where is Ducc Lake?
- Ducc Lake is a lake in Cullman County, Alabama. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ducc Lake?
- Ducc Lake in Cullman County, Alabama has a water quality grade of D (Nutrient-rich). Water clarity: 4.1 ft visibility. Phosphorus: 31 µg/L. Chlorophyll-a (algae): 19.2 µg/L.
Is Ducc Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Ducc Lake across LakeQuality
More Alabama Lake Rankings
Other Grade D Lakes in Alabama
Where this data comes from
94 measurements from 2 monitoring stations, 2017–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- ALABAMA DEPT. OF ENVIRONMENTAL MANAGEMENT - WATER QUALITY DATA
21AWIC94 samples · 2017–2024
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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.