Nla Lake is a productive, nutrient-rich eutrophic lake in Beaverhead County, Montana. Water quality is graded B based on 3 sampling years through 2012. Compared to the 4 other monitored lakes in Beaverhead County, Nla Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2012-07-31. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Crystal clear, you can see 24.6 ft down. Phosphorus level: 11000 µg/L. Chlorophyll-a: 1.2 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 24.6 ft | A |
| Phosphorus | 11000 µg/L | F |
| Chlorophyll-a (Algae) | 1.2 µg/L | A |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Nla Lake
Location
County Ranking
Ranked #2 of 5 lakes in Beaverhead County
Nearby Lakes in Beaverhead County
Explore Nla Lake across LakeGrade
More Montana Lake Rankings
Other Grade B Lakes in Montana
Eutrophic Lakes in Montana
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: 2012-07-31
Monitoring stations: 1