Nla Lake is a highly nutrient-loaded hypereutrophic lake in Okanogan County, Washington. Water quality is graded B based on 3 sampling years through 2017. Compared to the 6 other monitored lakes in Okanogan County, Nla Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Washington DNR, last sampled 2017-07-24. 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 14.9 ft down. Phosphorus level: 47515.6 µg/L. Chlorophyll-a: 2.2 µg/L. Trophic State Index: 79.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.9 ft | A |
| Phosphorus | 47515.6 µg/L | F |
| Chlorophyll-a (Algae) | 2.2 µg/L | A |
| Trophic State Index (TSI) | 79 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Nla Lake
Location
County Ranking
Ranked #4 of 7 lakes in Okanogan County
Cleaner Lakes Within 30 Miles
Nla Lake holds Grade B. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Okanogan County
Explore Nla Lake across LakeGrade
More Washington Lake Rankings
Other Grade B Lakes in Washington
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: 2017-07-24
Monitoring stations: 1