Coconino County Lake Quality

Arizona, 20 lakes, average grade D (Poor)

There are 20 graded lakes in Coconino County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. On average, Coconino County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Nla Lake (A); the most-stressed is Nla Lake (F).

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Quick Answers for Coconino County

Cleanest lakes in Coconino County →Cleanest lakes in Arizona →Safest swimming lakes in Arizona →

Planning a trip? Check special fishing regulations for Nla Lake — or check the official Arizona fishing regulations.

All Lakes in Coconino County

Rank	Lake	Grade	Clarity	Phosphorus
1	Nla Lake	A	10 ft	13.8 µg/L
2	Woods Canyon Lake	B	9.7 ft	17.5 µg/L
3	Bear Canyon Lake	B	8.7 ft	15 µg/L
4	Lake Powell	C	26.2 ft	32 µg/L
5	Canyon Mine Detention Pond	C	-	50 µg/L
6	Dogtown Reservoir	C	-	33 µg/L
7	Nla Lake	D	5.7 ft	75000 µg/L
8	Sante Fe Lake	D	2.3 ft	69 µg/L
9	Nla Lake	F	2.5 ft	396.6 µg/L
10	Nla Lake	F	0.9 ft	518.9 µg/L
11	Whitehorse Lake	F	1.6 ft	190 µg/L
12	Kinnikinick Lake	F	0.5 ft	210 µg/L
13	Dogtown Res. Lake	F	3.4 ft	149.5 µg/L
14	Cataract Lake	F	4.6 ft	260 µg/L
15	Ashurst Lake	F	1.4 ft	310 µg/L
16	Lake Mary	F	0.3 ft	120 µg/L
17	Kaibab Lake	F	0.4 ft	175 µg/L
18	Owl Tank Lake	F	-	450.5 µg/L