Assumption Parish County Lake Quality
Louisiana, 22 lakes, average grade F (Algae-prone)
There are 22 graded lakes in Assumption Parish County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
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. Lake Verret West-Northwest of Labadieville (D) is the cleanest in the county.
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Quick Answers for Assumption Parish County
Planning a trip? Check special fishing regulations for Lake Verret West-Northwest of Labadieville — or check the official Louisiana fishing regulations.
All Lakes in Assumption Parish County
22 lakes · 21 graded, 1 not rated21 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DLake Verret West-Northwest of LabadievilleAssumption Parish | D | No recent samples | 230 µg/L | No recent samples | No recent samples | Not recorded |
| 2 | FLake Verret East of Belle RiverAssumption Parish | F | No recent samples | No recent samples | 35.2 µg/L | No recent samples | Not recorded |
| 3 | FLake Verret East-Southeast of Belle RiverAssumption Parish | F | No recent samples | No recent samples | 41.8 µg/L | No recent samples | Not recorded |
| 4 | FLake Verret North-Northwest of BruleAssumption Parish | F | No recent samples | 835 µg/L | 40 µg/L | No recent samples | Not recorded |
| 5 | FLake Verret Northwest of BruleAssumption Parish | F | No recent samples | No recent samples | 40.2 µg/L | No recent samples | Not recorded |
| 6 | FLake Verret Northwest of OakleyAssumption Parish | F | No recent samples | No recent samples | 42.2 µg/L | No recent samples | Not recorded |
| 7 | FLake Verret Northwest of SupremeAssumption Parish | F | No recent samples | No recent samples | 35.7 µg/L | No recent samples | Not recorded |
| 8 | FLake Verret South of NapoleonvilleAssumption Parish | F | No recent samples | 270 µg/L | 41.5 µg/L | No recent samples | Not recorded |
| 9 | FLake Verret Southwest of NapoleonvilleAssumption Parish | F | No recent samples | No recent samples | 36.7 µg/L | No recent samples | Not recorded |
| 10 | FLake Verret Southwest of OakleyAssumption Parish | F | No recent samples | 875 µg/L | 39.6 µg/L | No recent samples | Not recorded |
| 11 | FLake Verret Southwest of SupremeAssumption Parish | F | No recent samples | No recent samples | 39.2 µg/L | No recent samples | Not recorded |
| 12 | FLake Verret West-Northwest of BruleAssumption Parish | F | No recent samples | No recent samples | 42.6 µg/L | No recent samples | Not recorded |
| 13 | FLake Verret West-Northwest of LecheAssumption Parish | F | No recent samples | 615 µg/L | 48.9 µg/L | No recent samples | Not recorded |
| 14 | FLake Verret West-Northwest of OakleyAssumption Parish | F | No recent samples | No recent samples | 38.9 µg/L | No recent samples | Not recorded |
| 15 | FLake Verret West-Northwest of SupremeAssumption Parish | F | No recent samples | 240 µg/L | 38.4 µg/L | No recent samples | Not recorded |
| 16 | FLake Verret West of BellewoodAssumption Parish | F | No recent samples | No recent samples | 41.9 µg/L | No recent samples | Not recorded |
| 17 | FLake Verret West of BruleAssumption Parish | F | No recent samples | No recent samples | 41.8 µg/L | No recent samples | Not recorded |
| 18 | FLake Verret West of OakleyAssumption Parish | F | No recent samples | No recent samples | 39.5 µg/L | No recent samples | Not recorded |
| 19 | FLake Verret West of SupremeAssumption Parish | F | No recent samples | No recent samples | 38.2 µg/L | No recent samples | Not recorded |
| 20 | FLake Verret West-Southwest of NapoleonvilleAssumption Parish | F | No recent samples | 250 µg/L | 40.1 µg/L | No recent samples | Not recorded |
| 21 | FLake Verret West-Southwest of SupremeAssumption Parish | F | No recent samples | No recent samples | 43.3 µg/L | No recent samples | Not recorded |
| NRLake Verret Southwest of PaincourtvilleAssumption Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Louisiana
See how Assumption Parish County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.