What are eutrophic lakes in Texas?

43 eutrophic lakes in Texas. High nutrients, frequent algae, reduced clarity.

What does eutrophic mean?

High nutrients, frequent algae, reduced clarity.

Eutrophic Lakes in Texas

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. 43 Texas 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	Hubbard Creek Reservoir	Stephens	B	3.1 ft	-	55
2	Bois D'Arc Lake	Fannin	B	2.4 ft	-	61
3	Hords Creek Reserv Lake	Coleman	B	2.6 ft	-	55
4	Lake Sweetwater Mid Lake	Nolan	B	3.6 ft	-	54
5	Fairfield Lake	Freestone	B	3.2 ft	-	60
6	Lake Fk Reservoir	Wood	C	1.9 ft	-	65
7	Lake Coleman	Coleman	C	3.9 ft	-	52
8	Lake Bob Sandlin	Camp	C	3.9 ft	-	57
9	B A Steinhagen Reservoir	Jasper	C	1.1 ft	-	64
10	Houston County Lake	Houston	C	3 ft	-	58
11	Lake Brownwood N End of Dam	Brown	C	4.3 ft	-	54
12	Lake Gilmer	Upshur	C	3 ft	-	60
13	Sam Rayburn Reservoir	San Augustine	C	3.9 ft	-	56
14	Sam Rayburn Lake	Nacogdoches	C	0.8 ft	-	69
15	Purtis Creek Lake	Henderson	C	3 ft	-	61
16	Lake Tyler E	Smith	C	3.3 ft	-	58
17	Lake Tyler	Smith	C	3.4 ft	-	58
18	Lake Athens	Henderson	C	5.9 ft	-	52
19	Upper Pat Mayse Reservoir	Lamar	C	3.1 ft	-	58
20	Pat Mayse Reservoir	Lamar	C	3.9 ft	-	57
21	Lewisville Lake	Denton	D	1.8 ft	-	63
22	Grapevine Lake	Tarrant	D	2.4 ft	-	61
23	Lake Tawakoni	Hunt	D	1.5 ft	-	69
24	Ray Roberts Lake	Cooke	D	2.6 ft	-	58
25	Lake Conroe	Montgomery	D	2.2 ft	-	65
26	Whitney Lake	Hill	D	4.8 ft	-	53
27	Lake Whitney	Bosque	D	3.1 ft	-	59
28	Ray Roberts Lake Site	Denton	D	3.9 ft	-	54
29	Lake Gladewater	Upshur	D	3 ft	-	60
30	Possum Kingdom Lake	Stephens	D	3.9 ft	-	56
31	Lake Brownwood	Brown	D	1.8 ft	-	63
32	Wright Patman Lake Site	Cass	D	1.8 ft	-	66
33	Lake Palo Pinto	Palo Pinto	D	3.9 ft	-	56
34	White River Lake	Crosby	D	0.7 ft	-	66
35	Lake Graham	Young	D	3.6 ft	-	58
36	Cooper Lake Site	Hopkins	D	2.7 ft	-	62
37	Walter E Long Lake Eastern Arm	Travis	D	4.2 ft	-	56
38	Lake Fort Phantom Hill	Jones	D	2.5 ft	-	63
39	Marine Creek Lake	Tarrant	D	3.3 ft	-	55
40	Walter E Long Lake Mid Lake	Travis	D	3.6 ft	-	57
41	Red Bluff Reservoir	Reeves	D	1.9 ft	-	58
42	Shallow Prong Lake	Jefferson	D	1.3 ft	-	69
43	Walter E Long Lake Western Arm	Travis	D	4.9 ft	-	55

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 →Florida version →Colorado version →North Carolina version →Vermont 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 →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All Texas lakes →

Source: EPA National Aquatic Resource Surveys, 2026.