St. Charles Parish County Lake Quality
Louisiana, 7 lakes, average grade C (Fair)
St. Charles Parish County has 7 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. St. Charles Parish County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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 Salvador East-Southeast of Raceland (C); the most-stressed is Lake Salvador East-Southeast of Raceland (C).
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Quick Answers for St. Charles Parish County
Planning a trip? Check special fishing regulations for Lake Salvador East-Southeast of Raceland — or check the official Louisiana fishing regulations.
All Lakes in St. Charles Parish County
7 lakes · 1 graded, 6 not rated1 graded lake · 6 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | CLake Salvador East-Southeast of RacelandSt. Charles Parish | C | No recent samples | 200 µg/L | 25.9 µg/L | No recent samples | Not recorded |
| NRBonnet Carre LakeSt. Charles Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Salvador East-Northeast of GheensSt. Charles Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Salvador East-Northeast of LockportSt. Charles Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Salvador North of LaroseSt. Charles Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Salvador Northeast of GheensSt. Charles Parish | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Salvador Southeast of KraemerSt. Charles 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 St. Charles 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.