Nla Lake is a cold, clear oligotrophic lake in Lake County, Montana. Water quality is graded A based on 3 sampling years through 2017. Compared to the 26 other monitored lakes in Lake County, Nla Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2017-08-18. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 32.3 ft down. Phosphorus level: 7.8 µg/L. Chlorophyll-a: 0.9 µg/L. Trophic State Index: 30.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 32.3 ft | A |
| Phosphorus | 7.8 µg/L | A |
| Chlorophyll-a (Algae) | 0.9 µg/L | A |
| Trophic State Index (TSI) | 30 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Nla Lake
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Fishing Nla Lake
Location
County Ranking
Ranked #1 of 27 lakes in Lake County
Nearby Lakes in Lake County
Explore Nla Lake across LakeGrade
More Montana Lake Rankings
Other Grade A Lakes in Montana
Oligotrophic 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: 2017-08-18
Monitoring stations: 1