Nla Lake is a productive, nutrient-rich eutrophic lake in Ferry County, Washington. Water quality is graded C based on 2 sampling years through 2017. Compared to the 3 other monitored lakes in Ferry County, Nla Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Washington DNR, last sampled 2017-07-26. 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: 81.5 µg/L. Chlorophyll-a: 5.1 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 81.5 µg/L | D |
| Chlorophyll-a (Algae) | 5.1 µg/L | B |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Nla Lake
Location
County Ranking
Ranked #4 of 4 lakes in Ferry County
Cleaner Lakes Within 30 Miles
Nla Lake holds Grade C. 2 nearby lakes hold higher grades.
- AFdr LakeFerry County · 14.7 mi · Two grade letters higher (C → A)
- BNla LakeFerry County · 8.2 mi · Higher grade (C → B)
Nearby Lakes in Ferry County
Explore Nla Lake across LakeGrade
More Washington Lake Rankings
Other Grade C Lakes in Washington
Eutrophic 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: 2017-07-26
Monitoring stations: 1