Nla Lake is a productive, nutrient-rich eutrophic lake in Beaverhead County, Montana. Water quality is graded C based on 3 sampling years through 2017. Compared to the 4 other monitored lakes in Beaverhead County, Nla Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2017-09-06. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 2.6 ft of visibility. Phosphorus level: 56 µg/L. Chlorophyll-a: 2.8 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | F |
| Phosphorus | 56 µg/L | C |
| Chlorophyll-a (Algae) | 2.8 µg/L | A |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Nla Lake
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Fishing Nla Lake
Location
County Ranking
Ranked #4 of 5 lakes in Beaverhead County
Nearby Lakes in Beaverhead County
Explore Nla Lake across LakeGrade
More Montana Lake Rankings
Other Grade C 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: 2017-09-06
Monitoring stations: 1