Eddy County Lake Quality
New Mexico, 5 lakes, average grade C (Fair)
Only 5 lakes in Eddy County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lake Carlsbad Deep Station (A); the most-stressed is Six Mile Dam Lake (F).
Quick Answers for Eddy County
Planning a trip? Check special fishing regulations for Lake Carlsbad Deep Station — or check the official New Mexico fishing regulations.
All Lakes in Eddy County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Carlsbad Deep Station | A | 2.7 ft | - |
| 2 | Brantley Reservoir Shallow | B | 2.1 ft | 40 µg/L |
| 3 | Brantley Reservoir Deep | D | 3.9 ft | - |
| 4 | Six Mile Dam Lake | F | 1.6 ft | - |
Other Counties in New Mexico
See how Eddy County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Eddy County
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Source: EPA National Aquatic Resource Surveys, 2026.