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

San Juan County Lake Quality

New Mexico, 14 lakes, measured by NMED

San Juan County holds 14 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. The 14 monitored lakes in San Juan County carry whatever clarity, phosphorus, and chlorophyll-a readings NMED 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 San Juan County

Top-rated places to stay near San Juan County

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Quick Answers for San Juan County

Cleanest lakes in San Juan County →Best swimming lakes in New Mexico →

Planning a trip? Check special fishing regulations for Lake Farmington Deep — or check the official New Mexico fishing regulations.

All Lakes in San Juan County

14 lakes · 0 ranked on readings, 14 without enough sampling0 lakes ranked on readings · 14 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicAccess
Lake Farmington DeepSan Juan9.8 ftNo recent samples2.4 µg/LNo recent samplesNot recorded
Four Mile ReservoirSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Black LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Juans LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Long LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little White Cone LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Black LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Toadlena LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Captain Tom ReservoirSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Meadows ReservoirSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Youngs LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Morgan LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Jackson LakeSan JuanNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Tocito LakeSan JuanNo 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 New Mexico

San Miguel County

9 lakes

Guadalupe County

6 lakes

Rio Arriba County

24 lakes

Sandoval County

11 lakes

Otero County

7 lakes

Lincoln County

6 lakes

Browse every New Mexico 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 New Mexico Environment Department. See data sources.