Cullman County, Alabama · Water Quality Report Card
Smith Lake
Smith Lake in Cullman County, Alabama is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility.
- Clarity
- 9.8 ft
- Type
- Mesotrophic
Smith Lake is a mesotrophic lake in Cullman County, Alabama.
Source: EPA Water Quality Portal sampling records, ADEM, last sampled 2022-12-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Moderate clarity, visible to about 9.8 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.8 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Smith Lake
Location
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Where this data comes from
386 measurements from 15 monitoring stations, 2012–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Alabama Water Watch
AWW_WQX386 samples · 2012–2022
Analytical methods
- AWW QAPP
Monitoring station identifiers (15)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2022-12-27
Monitoring stations: 18