Nla Lake is a productive, nutrient-rich eutrophic lake in Clearwater County, Idaho. Water quality is graded C based on 3 sampling years through 2017.
Source: EPA Water Quality Portal sampling records, Idaho DNR, last sampled 2017-08-31. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 6.4 ft. Phosphorus level: 48 µg/L. Chlorophyll-a: 11.8 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.4 ft | D |
| Phosphorus | 48 µg/L | C |
| Chlorophyll-a (Algae) | 11.8 µg/L | C |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Nla Lake
Location
County Ranking
Ranked #1 of 1 lakes in Clearwater County
Cleaner Lakes Within 30 Miles
Nla Lake holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Clearwater County
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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: 2017-08-31
Monitoring stations: 1