Mesotrophic Lakes in New Mexico
5 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. 5 lakes in New Mexico 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 our A–F scale — the productive-but-clear band lines up with the middle of the letter grades.
| # | Lake | County | Grade | Clarity | Depth | TSI |
|---|---|---|---|---|---|---|
| 1 | Abiquiu Reservoir Chama R Inlet | Rio Arriba | A | 3.3 ft | - | 52 |
| 2 | Conchas Reservoir | San Miguel | A | 8.9 ft | - | 42 |
| 3 | Santa Rosa L Dp Sta Midchannel Buoy Lake | Guadalupe | A | 1.6 ft | - | 57 |
| 4 | Heron Lake Shallow | Rio Arriba | C | 2.5 ft | - | 52 |
| 5 | Alto Lake | Lincoln | D | 8.9 ft | - | 56 |
All mesotrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →Florida version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Arkansas version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Arizona version →Idaho version →Montana version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →Wyoming version →Georgia version →Massachusetts version →Ontario version →Québec version →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All New Mexico lakes →
Source: EPA National Aquatic Resource Surveys, 2026.