Trigg County Lake Quality
Kentucky, 3 lakes, average grade D (Nutrient-rich)
Trigg County holds 3 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 1 of those lake carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Trigg County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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. Energy Lake (D) is the cleanest in the county.
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Quick Answers for Trigg County
Planning a trip? Check special fishing regulations for Energy Lake — or check the official Kentucky fishing regulations.
All Lakes in Trigg County
3 lakes · 1 graded, 2 not rated1 graded lake · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DEnergy LakeTrigg | D | No recent samples | 36 µg/L | No recent samples | No recent samples | ✓ Public |
| NRLake BarkleyTrigg | NR | 1.9 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRHematite LakeTrigg | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Kentucky
See how Trigg County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.