De Soto Parish County Lake Quality
Louisiana, 2 lakes — no lake here has enough monitoring data for a grade
Only 2 lakes in De Soto Parish 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.
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. Smithport Lake West-Northwest of Abington (—) is the cleanest in the county.
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Quick Answers for De Soto Parish County
Planning a trip? Check special fishing regulations for Smithport Lake West-Northwest of Abington — or check the official Louisiana fishing regulations.
All Lakes in De Soto Parish County
2 lakes · 0 graded, 2 not rated0 graded lakes · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRSmithport Lake West-Northwest of AbingtonDe Soto Parish | NR | No recent samples | 110 µg/L | No recent samples | No recent samples | Not recorded | |
| NRWallace Lake South of ShreveportDe Soto Parish | NR | No recent samples | 100 µg/L | 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 De Soto 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.