Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Osceola County Lake Quality

Florida, 37 lakes, average grade B (Good)

There are 37 graded lakes in Osceola County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. With an average grade of B, Osceola County sits comfortably above the Florida median.

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 Osceola-Buck Lake (B); the most-stressed is Osceola-Bellalago Lake (D).

Slim Lake, Washburn County, Wisconsin. Photo: LakeQuality — Original photograph

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Quick Answers for Osceola County

Cleanest lakes in Osceola County →Cleanest lakes in Florida →Safest swimming lakes in Florida →

Planning a trip? Check special fishing regulations for Osceola-Buck Lake — or check the official Florida fishing regulations.

All Lakes in Osceola County

37 lakes · 21 graded, 16 not rated21 graded lakes · 16 not rated, hidden

Include not-rated lakes (16)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Access
1	BOsceola-Buck LakeOsceola	B	3 ft	27 µg/L	No recent samples	No recent samples	Not recorded
2	BOsceola-Fish LakeOsceola	B	4 ft	36 µg/L	No recent samples	No recent samples	Not recorded
3	BOsceola-Alligator LakeOsceola	B	4 ft	18 µg/L	No recent samples	No recent samples	Not recorded
4	BOsceola-Lizzie LakeOsceola	B	2.7 ft	21 µg/L	No recent samples	No recent samples	Not recorded
5	BOsceola-Tohopekaliga East LakeOsceola	B	5 ft	21.5 µg/L	No recent samples	No recent samples	Not recorded
6	BOsceola-Bay LakeOsceola	B	4.7 ft	13 µg/L	No recent samples	No recent samples	Not recorded
7	BOsceola-Coon LakeOsceola	B	1.5 ft	31 µg/L	No recent samples	No recent samples	Not recorded
8	BOsceola-Ajay LakeOsceola	B	2 ft	32 µg/L	No recent samples	No recent samples	Not recorded
9	BOsceola-Trout LakeOsceola	B	2.8 ft	19 µg/L	No recent samples	No recent samples	✓ Public
10	BOsceola-Center LakeOsceola	B	1.3 ft	43 µg/L	No recent samples	No recent samples	✓ Public
11	BOsceola-Tohopekaliga-Middle LakeOsceola	B	3 ft	24 µg/L	No recent samples	No recent samples	Not recorded
12	BOsceola-Cat LakeOsceola	B	2.5 ft	30 µg/L	No recent samples	No recent samples	Not recorded
13	BCoonctr LakeOsceola	B	1.8 ft	36.5 µg/L	No recent samples	No recent samples	Not recorded
14	BOsceola-Brick LakeOsceola	B	1.8 ft	22 µg/L	No recent samples	No recent samples	Not recorded
15	BOsceola-Cecile LakeOsceola	B	7.2 ft	10 µg/L	No recent samples	No recent samples	Not recorded
16	BOsceola-Hinden LakeOsceola	B	4 ft	11 µg/L	No recent samples	No recent samples	Not recorded
17	CLkcenter LakeOsceola	C	1.3 ft	57 µg/L	No recent samples	No recent samples	Not recorded
18	CFish LakeOsceola	C	2 ft	55.5 µg/L	No recent samples	No recent samples	✓ Public
19	DOsceola-Bellalago LakeOsceola	D	2 ft	84 µg/L	No recent samples	No recent samples	Not recorded
20	DLake MarianOsceola	D	1 ft	180 µg/L	No recent samples	No recent samples	Not recorded
21	DLake Marian PavilionOsceola	D	0.8 ft	185 µg/L	No recent samples	No recent samples	✓ Public
	NROsceola-Tohopekaliga-North LakeOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake RianhardOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake Rianhard East of CenterOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake RainhardOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake KissimmeeOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NROsceola-Hole PondOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake TohoOsceola	NR	3 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NROsceola-House of Dreams LakeOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NROsceola-Harmony Estates-Retent P LakeOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake RunnymedeOsceola	NR	2.1 ft	280 µg/L	No recent samples	No recent samples	Not recorded
	NRAlligator LakeOsceola	NR	4.4 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRLkmrian LakeOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCypressctr LakeOsceola	NR	3 ft	32 µg/L	No recent samples	No recent samples	✓ Public
	NRLake MarianOsceola	NR	1 ft	75 µg/L	No recent samples	No recent samples	Not recorded
	NRLake TohopekaligaOsceola	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRLake KissimmeeOsceola	NR	No recent samples	No recent samples	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 Florida

Bay County

17 lakes · Avg grade B

Miami-Dade County

9 lakes · Avg grade B

Washington County

11 lakes · Avg grade B

Santa Rosa County

1 lake · Avg grade B

Wakulla County

6 lakes · Avg grade B

Jackson County

7 lakes · Avg grade B

See how Osceola 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.