Mesotrophic Lakes in Arizona

11 mesotrophic lakes in Arizona. Moderate nutrients, good water quality.

Mesotrophic lakes are the productive middle of the trophic scale — TSI between 40 and 50. Clear enough to be inviting, productive enough to support a strong fishery, with moderate phosphorus and a modest algal community that does not dominate the optical signal. 11 lakes in {{stateName}} sit in the mesotrophic band. About 0% are deep (50+ ft); the rest are shallower basins where watershed management keeps nutrients from pushing the system into eutrophy.

Mesotrophic lakes tend to grade B or C on the LakeGrade rubric — the productive-but-clear band lines up with the middle of the letter grades.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Nla Lake	Cochise	A	8.4 ft	-	44
2	Nla Lake	Coconino	A	10 ft	-	43
3	Nla Lake	Maricopa	A	10 ft	-	41
4	Woods Canyon Lake	Coconino	B	9.7 ft	-	45
5	Bear Canyon Lake	Coconino	B	8.7 ft	-	45
6	Ak-Chin Reservoir	Pinal	B	-	-	48
7	Lynx Lake	Yavapai	C	7.3 ft	-	50
8	Show Low Lake	Navajo	C	8.4 ft	-	50
9	Lake Powell	Coconino	C	26.2 ft	-	42
10	Alamo Lake	La Paz	C	13 ft	-	49
11	Parker Canyon Lake	Cochise	C	10.5 ft	-	48

All mesotrophic 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.