Eutrophic Lakes in Arizona

41 eutrophic lakes in Arizona. High nutrients, frequent algae, reduced clarity.

A eutrophic lake is a productive ecosystem with the trade-offs that come with productivity: more food at the base of the food web, more clarity reduction by mid-summer, more dissolved-oxygen variability near the bottom. 41 {{stateName}} 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 the LakeGrade rubric. The same nutrient richness that defines the trophic class drives the lower grade.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Mittry Lake	Yuma	C	-	-	53
2	Nla Lake	Maricopa	C	5.6 ft	-	57
3	Nla Lake	Maricopa	C	4 ft	-	56
4	Nla Lake	Yuma	C	1.5 ft	-	60
5	Saguaro Lake	Maricopa	C	3.9 ft	-	60
6	Roosevelt Lake	Gila	C	7.1 ft	-	55
7	Chaparral Park Lake	Maricopa	C	3 ft	-	59
8	Canyon Lake	Maricopa	C	3.4 ft	-	60
9	Goldwater Lake	Yavapai	C	10.7 ft	-	51
10	Fain Lake	Yavapai	C	4.4 ft	-	59
11	Alvord Park Lake	Maricopa	C	4.5 ft	-	57
12	Roper Lake	Graham	C	2.1 ft	-	63
13	Dankworth Lake	Graham	C	2.5 ft	-	62
14	Fool Hollow Lake	Navajo	C	4.3 ft	-	55
15	Kennedy Lake	Pima	C	1.9 ft	-	65
16	Red Mountain Lake	Maricopa	C	2.5 ft	-	60
17	Patagonia Lake	Santa Cruz	C	11.2 ft	-	53
18	Apache Lake	Maricopa	C	7.7 ft	-	52
19	Canyon Mine Detention Pond	Coconino	C	-	-	61
20	Dogtown Reservoir	Coconino	C	-	-	55
21	Nla Lake	Apache	D	0.9 ft	-	69
22	Nla Lake	Yavapai	D	-	-	69
23	Tempe Town Lake	Maricopa	D	1.7 ft	-	66
24	Lakeside Lake	Pima	D	1.3 ft	-	69
25	Tunnel Reservoir	Apache	D	6.7 ft	-	57
26	River Reservoir	Apache	D	4.9 ft	-	60
27	Bunch Reservoir	Apache	D	4.1 ft	-	61
28	Sante Fe Lake	Coconino	D	2.3 ft	-	65
29	Rose Canyon Lake	Pima	D	2.8 ft	-	64
30	Big Lake	Apache	D	6.7 ft	-	58
31	Horsethief Basin Lake	Yavapai	D	3.8 ft	-	62
32	Black Canyon Lake	Navajo	D	6.1 ft	-	60
33	Water Ranch Lake	Maricopa	D	1.6 ft	-	67
34	Hidden Lake	Maricopa	D	-	-	69
35	Granite Basin Lake	Yavapai	F	3 ft	-	69
36	Willow Creek Reservoir	Yavapai	F	3.8 ft	-	68
37	Pena Blanca Lake	Santa Cruz	F	6.6 ft	-	64
38	Dogtown Res. Lake	Coconino	F	3.4 ft	-	68
39	Cataract Lake	Coconino	F	4.6 ft	-	70
40	Crescent Lake	Apache	F	5.4 ft	-	66
41	Lake Mohave	Mohave	F	43.5 ft	-	54

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 →Texas version →Oregon version →Arkansas version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →Wyoming version →All Arizona lakes →

Source: EPA National Aquatic Resource Surveys, 2026.