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LakeQuality

Data Report

58
Monitored lakes sampled
C
Average readings
17.6%
low nutrient and algae readings
67.2%
On impaired list

New Mexico nutrient and algae readings

Cleanest lakes in New Mexico

Cleanest combined nutrient and algae readings, 2026.

  1. 1.Mescalero Lake Deep — Otero County50 µg/L P · 1 µg/L chl-a
  2. 2.Mescalero Lake Shallow — Otero County50 µg/L P · 2 µg/L chl-a
  3. 3.Silver Lake Deep — Otero County50 µg/L P · 1 µg/L chl-a
  4. 4.Silver Lake Shallow — Otero County50 µg/L P · 2 µg/L chl-a

Highest measured algae

Highest measured chlorophyll-a (algae) concentration.

  1. 1.Six Mile Dam Lake — Eddy County110 µg/L chlorophyll-a
  2. 2.Jal Lake — Lea County62 µg/L chlorophyll-a
  3. 3.Hopewell Lake — Rio Arriba County53 µg/L chlorophyll-a
  4. 4.Lake Roberts — Grant County41 µg/L chlorophyll-a
  5. 5.Caballo Lake — Sierra County37 µg/L chlorophyll-a
  6. 6.Burns Lake Deep — Rio Arriba County24 µg/L chlorophyll-a
  7. 7.Brantley Reservoir Deep — Eddy County21 µg/L chlorophyll-a
  8. 8.Elephant Butte Reservoir — Sierra County21 µg/L chlorophyll-a

Trending lakes

Improving

  1. 1.Heron Lake Deep Dam — Rio Arriba County
  2. 2.Grindstone Canyon Reservoir Deep — Lincoln County
  3. 3.Heron Lake Shallow — Rio Arriba County
  4. 4.Silver Lake Deep — Otero County
  5. 5.Alto Lake — Lincoln County
  6. 6.Silver Lake Shallow — Otero County
  7. 7.Grindstone Caynon Reservoir Inlet — Lincoln County
  8. 8.Caballo Lake — Sierra County

Declining

  1. 1.Hopewell Lake — Rio Arriba County
  2. 2.E Butte Lake — Sierra County
  3. 3.Mescalero Lake Deep — Otero County
  4. 4.Mescalero Lake Shallow — Otero County
  5. 5.Abiquiu Reservoir Chama R Inlet — Rio Arriba County
  6. 6.Conchas Reservoir — San Miguel County
  7. 7.Santa Rosa L Dp Sta Midchannel Buoy Lake — Guadalupe County
  8. 8.Burns Lake Deep — Rio Arriba County

Impaired waters in New Mexico

39 lakes appear on the EPA/state 303(d) impaired-waters list (39 formally listed, 5 with a cleanup plan/TMDL).

Nutrients (phosphorus, nitrogen) · 20Mercury · 15Temperature · 12PCBs · 4Fish consumption advisory · 3pH / acidity · 3Oxygen depletion (low DO) · 1Metals (other than mercury) · 1

Readings combine total phosphorus, total nitrogen, chlorophyll-a, and turbidity from the EPA Water Quality Portal and state agencies. See the full methodology, the national State of America’s Lakes report, or all New Mexico lakes.

Cite this report: LakeQuality, “The State of New Mexico's Lakes 2026”.