Upper Granite Lake
Skagit County, Washington126 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
Upper Granite Lake in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 126 acres.
Upper Granite Lake is a 126-acre lake in Skagit County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper Granite Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Upper Granite Lake
These are the measurements Washington Ecology publishes for Upper Granite Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
126 acres
Shoreline
2.1 mi
No bathymetric survey has been published for Upper Granite Lake, so its depth is not documented here.
Stays via Stay22
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Frequently asked questions about Upper Granite Lake
Where is Upper Granite Lake?
- Upper Granite Lake is a lake in Skagit County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Upper Granite Lake?
- Upper Granite Lake in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 126 acres.
Is Upper Granite Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Upper Granite Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.