Spearhead Lake is a mesotrophic lake in Skagit County, Washington. Water quality is graded A based on 2 sampling years through 2017. Compared to the 11 other monitored lakes in Skagit County, Spearhead Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Washington DNR, last sampled 2017-10-26. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 10.8 ft. Phosphorus level: 14 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.8 ft | B |
| Phosphorus | 14 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Spearhead Lake
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Fishing Spearhead Lake
Location
County Ranking
Ranked #1 of 12 lakes in Skagit County
Nearby Lakes in Skagit County
Explore Spearhead Lake across LakeGrade
More Washington Lake Rankings
Other Grade A Lakes in Washington
Mesotrophic 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: 2017-10-26
Monitoring stations: 2