Eutrophic Lakes in Florida

690 eutrophic lakes in Florida. High nutrients, frequent algae, reduced clarity.

Eutrophic lakes — TSI 50 to 70 — are nutrient-rich and productive, with persistent summer algal communities that drive visible reductions in clarity. These conditions are not failures; they reflect a lake doing what nutrient-loaded waters do. 690 Florida lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.

Eutrophic lakes typically grade C or D on our A–F scale. The same nutrient richness that defines the trophic class drives the lower grade.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Lake Lancaster West	Orange	B	3.5 ft	-	56
2	Eastern Lake Outlet	Walton	B	4.2 ft	-	50
3	Seminole-Secret Lake	Seminole	B	4.5 ft	-	52
4	Spring Lake	Seminole	B	2.9 ft	-	54
5	Polk-Fannie Lake	Polk	B	3.5 ft	-	56
6	Volusia-North Talmadge Lake	Volusia	B	4.5 ft	-	52
7	Seminole-Spring Lake	Seminole	B	3 ft	-	56
8	Lake Rowena	Orange	B	1.8 ft	-	62
9	Seminole-Little Howell Lake	Seminole	B	5 ft	-	52
10	Putnam-Suggs Lake	Putnam	B	2 ft	-	61
11	Alachua-Elizabeth Lake	Alachua	B	3 ft	-	53
12	Hillsborough-Dan Lake	Hillsborough	B	4.8 ft	-	52
13	Walton-Powell Lake	Walton	B	3.5 ft	-	51
14	Bear Gully Lake	Seminole	B	2.6 ft	-	59
15	Fuller Lake Middle	Walton	B	2.5 ft	-	53
16	Seminole-Bear Gully Lake	Seminole	B	3.3 ft	-	58
17	Columbia-Jeffery Lake	Columbia	B	4 ft	-	50
18	Seminole-Clear Lake	Seminole	B	5.3 ft	-	51
19	Olc Lake	Alachua	B	2 ft	-	62
20	Osceola-Buck Lake	Osceola	B	3 ft	-	56
21	Lake Mare Prairie	Orange	B	2.5 ft	-	61
22	Osceola-Fish Lake	Osceola	B	4 ft	-	56
23	Lake-Louisa	Lake	B	1.3 ft	-	59
24	Citrus-Floral City Lake	Citrus	B	5 ft	-	53
25	Hillsborough-Strawberry Lake	Hillsborough	B	3.5 ft	-	54
26	Lake-Erie	Lake	B	3.3 ft	-	55
27	Walton-Alligator Lake	Walton	B	2 ft	-	54
28	Sarasota-Bobcat Lake	Sarasota	B	3.8 ft	-	56
29	Bluelake	Volusia	B	3 ft	-	60
30	Osceola-Alligator Lake	Osceola	B	4 ft	-	51
31	Lake Powell West	Walton	B	3 ft	-	53
32	Lake Glenada	Highlands	B	2.3 ft	-	61
33	Walton-Draper Lake	Walton	B	3.3 ft	-	51
34	Lake Druid	Orange	B	6.1 ft	-	50
35	Osceola-Lizzie Lake	Osceola	B	2.7 ft	-	56
36	Crooked Lake	Orange	B	2.3 ft	-	58
37	Putnam-Rowan Lake	Putnam	B	2.5 ft	-	56
38	Minneolaeast Lake	Lake	B	3.9 ft	-	56
39	Seminole-Triplet Middle Lake	Seminole	B	3 ft	-	57
40	Lake Ivanhoe East	Orange	B	3.1 ft	-	54
41	St Lucie-Margaret Lake	St. Lucie	B	3.8 ft	-	53
42	Highlands-Persimmon Lake	Highlands	B	2 ft	-	59
43	Leon-Blue Heron Lake	Leon	B	4.5 ft	-	55
44	Loch Levennwsh Lake	Lake	B	4.9 ft	-	52
45	Horseshoe North Lake	Seminole	B	3.9 ft	-	56
46	Lake-Dorr	Lake	B	3.5 ft	-	53
47	Citrus-Tsala Apopka South Lake	Citrus	B	5 ft	-	54
48	Polk-Otis Lake	Polk	B	4 ft	-	53
49	Walton-Camp Creek Lake	Walton	B	2 ft	-	55
50	Osceola-Tohopekaliga East Lake	Osceola	B	5 ft	-	51
51	Park Lake	Orange	B	3.4 ft	-	57
52	Volusia-Waterford Lake	Volusia	B	5 ft	-	52
53	Orange-Lancaster Lake	Orange	B	4 ft	-	56
54	Orange-Jessamine Lake	Orange	B	4 ft	-	51
55	Lake-Florence	Lake	B	3.5 ft	-	53
56	Little Lake Jackson	Highlands	B	5.2 ft	-	51
57	Lake Allen Middle	Walton	B	2.5 ft	-	55
58	Lake Dan @ Center	Hillsborough	B	3.3 ft	-	56
59	Polk-Whistler Lake	Polk	B	5 ft	-	50
60	Charlotte-Casa-de-Medows Lake	Charlotte	B	1.7 ft	-	61
61	Hillsborough-Newlands Lake	Hillsborough	B	3 ft	-	59
62	Sumter-Panasoffkee Lake	Sumter	B	6 ft	-	51
63	Little Red Fish Middle Lake	Walton	B	3 ft	-	54
64	Lake-Little Harris	Lake	B	2 ft	-	59
65	Hillsborough-Cedar West Lake	Hillsborough	B	6.3 ft	-	53
66	Eastern Lake Roadside	Walton	B	4.5 ft	-	50
67	Highlands-Little Bonnet Lake	Highlands	B	2 ft	-	59
68	Buck Lake	Orange	B	4.8 ft	-	50
69	Polk-Weohyakapka Lake	Polk	B	2.4 ft	-	61
70	Polk-Davenport North Lake	Polk	B	3 ft	-	56
71	Lake-Bay	Lake	B	3 ft	-	57
72	Pasco-Bird Lake	Pasco	B	5.8 ft	-	50
73	Lake-Bear	Lake	B	2.8 ft	-	55
74	Hillsborough-Dosson Lake	Hillsborough	B	3.3 ft	-	56
75	Orange-John'S Lake	Lake	B	4.8 ft	-	51
76	Lake-Lorraine	Lake	B	3.5 ft	-	56
77	Lake-Dora West	Lake	B	2.3 ft	-	58
78	Seminole-Triplet South Lake	Seminole	B	3.3 ft	-	59
79	Polk-Lulu Lake	Polk	B	3 ft	-	57
80	Eastern North Middle Lake	Walton	B	3.5 ft	-	52
81	Orange-Waunatta Lake	Orange	B	3.5 ft	-	53
82	Polk-Eagle Lake	Polk	B	3 ft	-	54
83	Lake Iamonia	Leon	B	2 ft	-	63
84	Carl Lake	Orange	B	2.6 ft	-	55
85	Walton-Allen Lake	Walton	B	2.5 ft	-	56
86	Lake-Eustis	Lake	B	2.4 ft	-	56
87	Walton-Tresca Lake	Walton	B	3.2 ft	-	52
88	Lkannctr Lake	Seminole	B	2.8 ft	-	55
89	Lyc Lake	Lake	B	4.6 ft	-	51
90	Osceola-Coon Lake	Osceola	B	1.5 ft	-	62
91	Alligator Lake Roadside	Walton	B	2.1 ft	-	53
92	Hillsborough-Garden Lake	Hillsborough	B	4.3 ft	-	52
93	Har Lake	Lake	B	2.3 ft	-	57
94	Griffin Lake	Lake	B	2.3 ft	-	60
95	Lake Allen North	Walton	B	2.8 ft	-	54
96	Deer Lake Roadside	Walton	B	3 ft	-	51
97	Lkflorida Lake	Seminole	B	3.9 ft	-	58
98	Lucylksh Lake	Lake	B	3.9 ft	-	54
99	Alachua-Alto Lake	Alachua	B	3.5 ft	-	54
100	Joannash Lake	Lake	B	3.3 ft	-	53

All eutrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Arkansas version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Arizona version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →Wyoming version →Georgia version →Massachusetts version →Ontario version →Québec version →All Florida lakes →

Source: EPA National Aquatic Resource Surveys, 2026.