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

Modoc County Lake Quality

California, 103 lakes, measured by SWRCB

Modoc County in California carries 103 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Modoc County are productive, shallow basins; each lake page shows its own phosphorus and chlorophyll-a readings beside the EPA condition class.

The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Tule Lake.

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Where to stay near Modoc County

Top-rated places to stay near Modoc County

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

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Quick Answers for Modoc County

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

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

All Lakes in Modoc County

103 lakes · 1 ranked on readings, 102 without enough sampling1 lake ranked on readings · 102 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
1Tule LakeModocNo recent samples210 µg/L28.1 µg/LNo recent samplesNo recent samplesNot recorded
Alkali LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Antelope PlainsModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Antelope ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Avanzino ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Baseball ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bayley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bayley TankModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Beeler ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Mud LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Sage ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Boggs ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Boles MeadowModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Buchanan FlatModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cambron LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Clarks ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Clear LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cow Head TankModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Crowder Mountain ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dannhauser ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Davis Creek Orchards ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dead Horse ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Deadhorse Flat ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Deer Hill ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Delta LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Diamond ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dobe SwaleModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Donovan ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dorris Brothers ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dorris ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Double Head LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dry LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dry Valley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Duck PondModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Duncan ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Emigrant Spring ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Enquist ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Essex ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Everly ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Fee ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
French ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Goose LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samples12.1 ft✓ Public
Goose PondModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Graven ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Graves ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Green Spring ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Green Tank ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Griener ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hackamore ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Halls Meadows ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Henski ReservoirModocNo recent samplesNo recent samples3.2 µg/LNo recent samplesNo recent samplesNot recorded
Hines ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hog LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Householder ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Jacks Butte TankModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Janes ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Kelley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake AnnieModocNo recent samplesNo recent samples8.7 µg/LNo recent samplesNo recent samplesNot recorded
Lakeshore ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lauer ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little Egg LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little Juniper ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little Mud LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lone Pine LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Cummings ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Roberts ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Malone PoolModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mapes ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
McGinty ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Middle Alkali LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mosquito LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mud LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Payne ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pease FlatModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Picnic Grove ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pinnacle LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pretty Tree ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Raker and Thomas ReservoirsModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Red LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Reservoir CModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Reservoir FModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Reservoir GModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Reservoir MModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Reservoir NModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Rimrock Valley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Six-Shooter Stock TankModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
South Mountain ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Spaulding ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Stovepipe Flat TankModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Surveyors Valley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Sworinger ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Taylor ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Teal PondModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Telephone Flat ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Upper Cummings ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Upper LakeModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
West Valley ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Whitehorse Flat ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Whitney ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Wild Horse ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Williams ReservoirModocNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Wood Flat ReservoirModocNo 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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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.