North Tenmile Lake is a productive, nutrient-rich eutrophic lake in Coos County, Oregon. Water quality is graded D based on 1 sampling years through 2023. Compared to the 1 other monitored lakes in Coos County, North Tenmile Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Oregon DNR, last sampled 2023-10-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4.9 ft. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.9 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near North Tenmile Lake
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Fishing North Tenmile Lake
Location
County Ranking
Ranked #1 of 2 lakes in Coos County
Nearby Lakes in Coos County
Explore North Tenmile Lake across LakeGrade
More Oregon Lake Rankings
Other Grade D Lakes in Oregon
Eutrophic Lakes in Oregon
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: 2023-10-05
Monitoring stations: 1