Oakland County Lake Quality

Michigan, 45 lakes, average grade B (Good)

Oakland County's 45 graded lakes fall in the moderate-density bracket for Michigan. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

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 Square Lake Central Basin; Bloomfield Township (A); the most-stressed is Twin Lakes (D).

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Quick Answers for Oakland County

Cleanest lakes in Oakland County →Cleanest lakes in Michigan →Safest swimming lakes in Michigan →

Planning a trip? Check special fishing regulations for Square Lake Central Basin; Bloomfield Township, whether the fish are safe to eat, and the best times to fish — or check the official Michigan fishing regulations.

Fishing in Oakland County

Oakland County Fishing Guide

Fish species and best-graded lakes in Oakland County

All Lakes in Oakland County

Rank	Lake	Grade	Clarity	Phosphorus
1	Square Lake Central Basin; Bloomfield Township	A	25 ft	-
2	Square Lake	A	23 ft	-
3	Oxbow Lake	A	15 ft	-
4	Long Lake	B	13 ft	-
5	Long Lake Central Basin	B	13 ft	-
6	Lake Orion	B	13 ft	-
7	Maceday Lake	B	13 ft	-
8	Lotus Lake	B	10.8 ft	-
9	Middle Straits Lake	B	11 ft	-
10	Round Lake	B	10 ft	-
11	Lakeville Lake Central Basin	B	9.5 ft	-
12	Cedar Is. Lake East Central Basin,White Lake Township	B	11 ft	-
13	Cedar Island Lake	B	10.5 ft	-
14	Middle Straits Lake Central Basin; West Bloomfield Township	B	11 ft	-
15	Otter Lake North Basin; Waterford Township	B	10 ft	-
16	Cass Lake	B	12 ft	-
17	Otter Lake	B	10 ft	-
18	Upper Long Lake Northwest Basin; Bloomfield Township	B	8 ft	-
19	Wormer Lake	B	10 ft	-
20	Mohawk Lake	B	11 ft	-
21	Woodhull Lake Central Basin; Waterford Township	B	12 ft	-
22	Woodhull Lake	B	14.8 ft	-
23	Seymour Lake	C	9 ft	-
24	Lakeville Lake	C	8.8 ft	-
25	Cranberry Lake; Center of Deepest Basin; Independence Township	C	8 ft	-
26	Dollar Lake	C	9 ft	-
27	Sylvan Lake; Sylvan Lake Township	C	9.5 ft	-
28	Cranberry Lake	C	7.3 ft	-
29	Sylvan Lake	C	9.5 ft	-
30	Twin Lakes	C	5 ft	-
31	Pleasant Lake	C	9 ft	-
32	Pleasant Lake; West Bloomfield Township	C	9.5 ft	-
33	Upper Long Lake	C	8 ft	-
34	Twin Lakes	D	5 ft	-
35	Tull Lake Central Basin; White Lake Township	D	4.5 ft	-