St. Clair County, Alabama · Water Quality Report Card
Logan Martin Lake
Logan Martin Lake in St. Clair County, Alabama is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.8 ft visibility.
- Clarity
- 2.8 ft
- Type
- Eutrophic
- Trend
- → Stable
Logan Martin Lake is a productive, nutrient-rich eutrophic lake in St. Clair County, Alabama.
Source: EPA Water Quality Portal sampling records, ADEM, last sampled 2022-12-12. 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
Very murky, less than 2.8 ft of visibility. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Logan Martin Lake
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Fishing Logan Martin Lake
Water Quality Trend: → Stable
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.001 m/yr | 8 |
Location
Nearby Lakes in St. Clair County
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More records, surveys & data sources
Where this data comes from
752 measurements from 10 monitoring stations, 2012–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Alabama Water Watch
AWW_WQX752 samples · 2012–2022
Analytical methods
- AWW QAPP
Monitoring station identifiers (10)
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: 2022-12-12
Monitoring stations: 10