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

Siskiyou County Lake Quality

California, 34 lakes, measured by SWRCB

There are 34 monitored lakes in Siskiyou County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 34 monitored lakes in Siskiyou County carry whatever clarity, phosphorus, and chlorophyll-a readings SWRCB 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 Siskiyou County

Top-rated places to stay near Siskiyou County

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Quick Answers for Siskiyou County

Cleanest lakes in Siskiyou County →Best swimming lakes in California →

Planning a trip? Check special fishing regulations for Barnum Flat Reservoir — or check the official California fishing regulations.

All Lakes in Siskiyou County

34 lakes · 0 ranked on readings, 34 without enough sampling0 lakes ranked on readings · 34 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
Barnum Flat ReservoirSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Barton LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bass LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Duck LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bonita LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Campbell LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Caribou LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Castle LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cliff LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Copco LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Dwight Hammond ReservoirSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
East Boulder LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Greenhorn ReservoirSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hancock LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Indian Tom LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Iron Gate ReservoirSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Juanita LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake ShastinaSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake SiskiyouSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samples144 ftNot recorded
Little Crater LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Klamath LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Medicine LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Meiss LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Orr LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Red Rock LakesSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Sheepy LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Souza LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Steamboat LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Toad LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Trout LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Tule LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Ukonom LakeSiskiyouNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
White Deer LakeSiskiyouNo 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 California

Plumas County

19 lakes

Amador County

12 lakes

Placer County

16 lakes

Butte County

16 lakes

Nevada County

35 lakes

Santa Clara County

13 lakes

Browse every California 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 California State Water Resources Control Board. See data sources.