Sumner County Lake Quality
Tennessee, 2 lakes — no lake here has enough monitoring data for a grade
Sumner County holds 2 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. No lake in Sumner County has enough sampling behind it for an A–F grade yet. The 2 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
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.
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Quick Answers for Sumner County
Planning a trip? Check special fishing regulations for Portland Lake — or check the official Tennessee fishing regulations.
All Lakes in Sumner County
2 lakes · 0 graded, 2 not rated0 graded lakes · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRPortland LakeSumner | NR | No recent samples | 67.9 µg/L | No recent samples | No recent samples | Not recorded | |
| NRDrakes Creek LakeSumner | NR | No recent samples | 179 µg/L | No recent samples | No recent samples | ✓ Public |
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 Tennessee
See how Sumner 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.