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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Skagit County Lake Quality

Washington, 40 lakes, measured by Washington Ecology

The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The 40 monitored lakes in Skagit County carry whatever clarity, phosphorus, and chlorophyll-a readings Washington Ecology has published, shown as reported.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.

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Where to stay near Skagit County

Top-rated places to stay near Skagit County

Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.

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Quick Answers for Skagit County

Cleanest lakes in Skagit County →Best swimming lakes in Washington →

Planning a trip? Check special fishing regulations for Spearhead Lake — or check the official Washington fishing regulations.

All Lakes in Skagit County

40 lakes · 0 ranked on readings, 40 without enough sampling0 lakes ranked on readings · 40 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
Spearhead LakeSkagit10.8 ft14 µg/LNo recent samplesNo recent samplesNo recent samplesNot recorded
Grandy LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples12 ftNot recorded
Lake TyeeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake ShannonSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples280 ftNot recorded
Lake CavanaughSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples80 ftNot recorded
Judy ReservoirSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Day LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples45 ftNot recorded
Clear LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples44 ft✓ Public
Beaver LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ft✓ Public
Barney LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cranberry LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Whistle LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake CampbellSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples15 ft✓ Public
Heart LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples35 ft✓ Public
Pass LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples20 ftNot recorded
Sixteen LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples25 ft✓ Public
Devils LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples23 ft✓ Public
Cultus Mountain ReservoirSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake McMurraySkagitNo recent samplesNo recent samplesNo recent samplesNo recent samples52 ft✓ Public
Falls LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Slide LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Snowking LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Whale LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Upper Granite LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Granite LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Upper Jordan LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Jordan LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Monogram LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hidden LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Found LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cyclone LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bench LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Crater LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Boulder LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Itswoot LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Woods LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
South Cascade LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Klawatti LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Moraine LakeSkagitNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Other Counties in Washington

Lincoln County

22 lakes

Grant County

48 lakes

Whatcom County

34 lakes

Yakima County

23 lakes

Snohomish County

52 lakes

Thurston County

29 lakes

Browse every Washington lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Washington State Department of Ecology. See data sources.