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LakeQuality

Mesotrophic Lakes in New Mexico

23 mesotrophic lakes in New Mexico. Moderate nutrients, good water quality.

Mesotrophic lakes are the productive middle of the trophic scale — TSI between 40 and 50. Clear enough to be inviting, productive enough to support a strong fishery, with moderate phosphorus and a modest algal community that does not dominate the optical signal. 23 lakes in {{stateName}} sit in the mesotrophic band. About 0% are deep (50+ ft); the rest are shallower basins where watershed management keeps nutrients from pushing the system into eutrophy.

Mesotrophic lakes tend to grade B or C on the LakeGrade rubric — the productive-but-clear band lines up with the middle of the letter grades.

#LakeCountyGradeClarityDepthTSI
1Navajo Reservoir Canon Bancos ConfluenceRio ArribaA9.1 ft-41
2Navajo Reservoir Negro CanyonSan JuanA6.5 ft-44
3Ute ReservoirQuayA7.5 ft-43
4Conchas ReservoirSan MiguelA8.9 ft-42
5Ute ReservoirQuayA5.1 ft-47
6Lake Farmington DeepSan JuanA9.8 ft-42
7Nla LakeSan MiguelA8.2 ft-44
8Nla LakeColfaxA10.5 ft-44
9Nla LakeColfaxA8.2 ft-44
10Fenton LakeSandovalA7.9 ft-46
11Figure Eight LakeChavesA6.9 ft-45
12Navajo ReservoirRio ArribaB--48
13Heron Lake Deep DamRio ArribaB3.7 ft-49
14Grindstone Canyon Reservoir DeepLincolnB9 ft-46
15Conchas Reservoir Canadian ArmSan MiguelB6.6 ft-46
16Lower Charette LakeMoraB6.9 ft-46
17Eagle Nest LakeColfaxB8.9 ft-44
18Mescalero Lake DeepOteroB--46
19Mescalero Lake ShallowOteroB--49
20Silver Lake ShallowOteroB--49
21North Shuree PondColfaxC8.9 ft-50
22Cabresto Lake DeepTaosC13.1 ft-46
23Perch LakeGuadalupeC14.8 ft-47

Source: EPA National Aquatic Resource Surveys, 2026.