What is the cleanest lake in Navajo County, Arizona?

Clear Creek Reservoir in Navajo County is the highest-rated lake in Navajo County, Arizona with an EPA water quality grade of NR.

How are these rankings calculated?

Lakes are graded A through F on nutrients and algae — total phosphorus, nitrogen, chlorophyll-a, and turbidity — against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Navajo County, Arizona

Clear Creek Reservoir in Navajo County leads the rankings with a water quality grade of NR. Below are the top 16 cleanest monitored lakes in Navajo County, Arizona, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Clear Creek Reservoir	Navajo	NR	-	-	-
2	Cholla Lake	Navajo	NR	-	-	-
3	Dry Lake	Navajo	NR	-	-	-
4	Tobenayoli Pond	Navajo	NR	-	-	-
5	Dry Lake	Navajo	NR	-	-	-
6	Telephone Lake	Navajo	NR	-	-	-
7	White Lake	Navajo	NR	-	-	-
8	Pintail Lake	Navajo	NR	-	-	-
9	Scott Reservoir	Navajo	NR	-	-	-
10	Little Mormon Lake	Navajo	NR	-	-	-
11	Whipple Lake	Navajo	NR	-	-	-
12	Long Lake	Navajo	NR	-	-	-
13	White Mountain Lake	Navajo	NR	-	-	-
14	Mexican Lake	Navajo	NR	-	-	-
15	Schoens Lake	Navajo	NR	-	-	-
16	Happy Tank	Navajo	NR	-	-	-

Ranked List

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