Nla Lake is a highly nutrient-loaded hypereutrophic lake in Madison County, Tennessee. Water quality is graded D based on 2 sampling years through 2012.
Source: EPA Water Quality Portal sampling records, Tennessee DNR, last sampled 2012-09-14. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 3.4 ft. Phosphorus level: 42000 µg/L. Chlorophyll-a: 18.7 µg/L. Trophic State Index: 92.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.4 ft | D |
| Phosphorus | 42000 µg/L | F |
| Chlorophyll-a (Algae) | 18.7 µg/L | C |
| Trophic State Index (TSI) | 92 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Location
County Ranking
Ranked #1 of 1 lakes in Madison County
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More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2012-09-14
Monitoring stations: 1