Nla Lake is a highly nutrient-loaded hypereutrophic lake in Flathead County, Montana. Water quality is graded C based on 2 sampling years through 2012. Compared to the 79 other monitored lakes in Flathead County, Nla Lake ranks #80 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2012-08-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
No clarity data. Phosphorus level: 12000 µg/L. Chlorophyll-a: 0.9 µg/L. Trophic State Index: 84.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 12000 µg/L | F |
| Chlorophyll-a (Algae) | 0.9 µg/L | A |
| Trophic State Index (TSI) | 84 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Nla Lake
Location
County Ranking
Ranked #80 of 80 lakes in Flathead County
Cleaner Lakes Within 30 Miles
Nla Lake holds Grade C. 5 nearby lakes hold higher grades.
- ASmith LakeFlathead County · 9.4 mi · Two grade letters higher (C → A)
- AUpper Whitefish LakeFlathead County · 9.4 mi · Two grade letters higher (C → A)
- ALower Stillwater LakeFlathead County · 10.7 mi · Two grade letters higher (C → A)
- AWhitefish LakeFlathead County · 10.9 mi · Two grade letters higher (C → A)
- ANla LakeFlathead County · 11.8 mi · Two grade letters higher (C → A)
Nearby Lakes in Flathead County
Explore Nla Lake across LakeGrade
More Montana Lake Rankings
Other Grade C Lakes in Montana
Hypereutrophic 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: 2012-08-22
Monitoring stations: 1