Hypereutrophic Lakes in Oklahoma

52 hypereutrophic lakes in Oklahoma. Very high nutrients, dense algae, poor clarity.

Hypereutrophic lakes (TSI above 70) are at the upper end of the productivity scale: visible algal blooms most weeks of summer, clarity often under 3 feet, and meaningful risk of harmful-algal-bloom toxin events. 52 hypereutrophic lakes are on the {{stateName}} books. Almost none of them are deep — 0% break 50 feet. Shallow basin plus heavy nutrient input is the consistent recipe.

Hypereutrophic lakes overwhelmingly grade D or F — the trophic class and the grade are measuring closely-related dimensions of the same underlying nutrient regime.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Nla Lake	Haskell	C	5.8 ft	-	77
2	Nla Lake	Grady	C	6.5 ft	-	70
3	Nla Lake	Osage	C	7.2 ft	-	81
4	Nla Lake	Osage	C	1.8 ft	-	87
5	Nla Lake	Murray	D	2.8 ft	-	89
6	Nla Lake	Cherokee	D	5.3 ft	-	79
7	Nla Lake	Osage	D	0.7 ft	-	103
8	Nla Lake	Seminole	D	3 ft	-	89
9	Nla Lake	Osage	D	2.9 ft	-	86
10	Nla Lake	Stephens	D	1 ft	-	98
11	Nla Lake	Okmulgee	D	0.6 ft	-	104
12	Nla Lake	Cotton	D	0.4 ft	-	102
13	Nla Lake	Latimer	D	3.4 ft	-	84
14	Nla Lake	Osage	D	4.8 ft	-	75
15	Nla Lake	Payne	D	0.7 ft	-	101
16	Nla Lake	Tulsa	D	3.4 ft	-	93
17	Nla Lake	Okfuskee	D	4.1 ft	-	75
18	Washunga Bay Lake	Kay	D	-	-	72
19	Sandy Beach Lake	Osage	D	-	-	72
20	Sarge Creek Lake	Kay	D	-	-	71
21	Osage Cove Lake	Osage	D	-	-	70
22	Nla Lake	Carter	D	1.9 ft	-	89
23	Nla Lake	Pontotoc	D	2.5 ft	-	93
24	Nla Lake	Blaine	D	1.8 ft	-	95
25	Nla Lake	Canadian	D	0.9 ft	-	107
26	Nla Lake	Washita	D	2 ft	-	75
27	Nla Lake	Osage	D	0.5 ft	-	75
28	Coon Creek Lake	Kay	D	-	-	77
29	Lake Texoma	Johnston	F	0.3 ft	-	89
30	Nla Lake	Canadian	F	0.7 ft	-	114
31	Nla Lake	Caddo	F	1.5 ft	-	108
32	Nla Lake	Noble	F	0.4 ft	-	128
33	Nla Lake	Sequoyah	F	1.1 ft	-	105
34	Nla Lake	Washita	F	0.7 ft	-	81
35	Nla Lake	Hughes	F	1.2 ft	-	112
36	Nla Lake	Stephens	F	0.6 ft	-	113
37	Nla Lake	Pawnee	F	1 ft	-	108
38	Nla Lake	Canadian	F	1.1 ft	-	74
39	Nla Lake	Atoka	F	0.7 ft	-	78
40	Nla Lake	McCurtain	F	1 ft	-	78
41	Nla Lake	Craig	F	0.9 ft	-	75
42	Nla Lake	Cimarron	F	1 ft	-	73
43	Nla Lake	Canadian	F	0.5 ft	-	86
44	Nla Lake	Sequoyah	F	1.3 ft	-	72
45	Grand Lake	Delaware	F	1.6 ft	-	109
46	Ponca Lake B	Kay	F	-	-	98
47	Bear Creek Lake	Kay	F	-	-	102
48	Veteran'S Lake	Lincoln	F	-	-	86
49	Lake Nahni Waiya Tuskahomma	Pushmataha	F	-	-	84
50	Lake Sardis Clayton	Pushmataha	F	-	-	84
51	Lake Hugo Hugo	Choctaw	F	-	-	93
52	Ft. Cobb Lake	Caddo	F	-	-	82

All hypereutrophic 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 →Florida version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Arkansas 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 →All Oklahoma lakes →

Source: EPA National Aquatic Resource Surveys, 2026.