Okaloosa County Lake Quality
Florida, 10 lakes, average grade C (Fair)
Okaloosa County has 10 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. Okaloosa 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.
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. Okaloosa-Roberts Lake (B) is the cleanest in the county.
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Quick Answers for Okaloosa County
Planning a trip? Check special fishing regulations for Okaloosa-Roberts Lake — or check the official Florida fishing regulations.
All Lakes in Okaloosa County
10 lakes · 9 graded, 1 not rated9 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | BOkaloosa-Roberts LakeOkaloosa | B | 4.5 ft | 7.5 µg/L | No recent samples | No recent samples | Not recorded |
| 2 | BRobert'S LakeOkaloosa | B | 4.5 ft | 7 µg/L | No recent samples | No recent samples | Not recorded |
| 3 | BOkaloosa-Cba Bass LakeOkaloosa | B | 1.5 ft | 31.5 µg/L | No recent samples | No recent samples | Not recorded |
| 4 | BBass Lake From Mooney RoadOkaloosa | B | 1.5 ft | 26 µg/L | No recent samples | No recent samples | ✓ Public |
| 5 | BBass Lake From Fort Walton Beach Golf CourseOkaloosa | B | 1.5 ft | 23 µg/L | No recent samples | No recent samples | Not recorded |
| 6 | DTwin LakesOkaloosa | D | 2 ft | 515 µg/L | No recent samples | No recent samples | Not recorded |
| 7 | DTwin Lake Eastern LakeOkaloosa | D | 2.3 ft | 90 µg/L | No recent samples | No recent samples | Not recorded |
| 8 | DTwin Lake South LobeOkaloosa | D | 2 ft | 440 µg/L | No recent samples | No recent samples | Not recorded |
| 9 | DKell-Aire LakeOkaloosa | D | 1.6 ft | 130 µg/L | No recent samples | No recent samples | Not recorded |
| NRLake EarlOkaloosa | NR | 5.2 ft | 17 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.
Lake Match
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Other Counties in Florida
See how Okaloosa 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.