What is the cleanest lake in Oconto County, Wisconsin?

Round Lake in Oconto County is the highest-rated lake in Oconto County, Wisconsin with an EPA water quality grade of A and 16.8 feet of water clarity.

How are these rankings calculated?

Lakes are graded A through F using the Metropolitan Council methodology, which combines Secchi depth (water clarity), total phosphorus, and chlorophyll-a (algae) into a single score. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Oconto County, Wisconsin

Round Lake in Oconto County leads the rankings with a water quality grade of A and 16.8 ft of clarity. Below are the top 50 cleanest monitored lakes in Oconto County, Wisconsin, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Round Lake	Oconto	A	16.8 ft	13.8 µg/L	-
2	Bass Lake	Oconto	A	16.8 ft	10.7 µg/L	-
3	Explosion Lake	Oconto	A	17 ft	15.7 µg/L	-
4	Archibald Lake	Oconto	A	17.6 ft	10.6 µg/L	-
5	Green Lake	Oconto	A	18.3 ft	17.9 µg/L	-
6	Paya Lake	Oconto	A	20 ft	10.5 µg/L	-
7	Boot Lake	Oconto	A	21.5 ft	11.3 µg/L	-
8	Star Lake	Oconto	A	17 ft	14.2 µg/L	-
9	Bear Paw Lake	Oconto	A	16 ft	11.1 µg/L	-
10	Shay Lake	Oconto	A	15 ft	14.2 µg/L	-
11	Neligan Lake	Oconto	A	15 ft	11.1 µg/L	-
12	Pine Ridge Lake	Oconto	A	17 ft	11 µg/L	-
13	Halfmoon Lake	Oconto	A	16 ft	11.8 µg/L	-
14	Maiden Lake	Oconto	A	22.7 ft	9.9 µg/L	-
15	Wheeler Lake	Oconto	A	22 ft	11.9 µg/L	-
16	Boulder Lake	Oconto	A	11 ft	13.3 µg/L	-
17	Little Pickerel Lake	Oconto	A	11 ft	16.7 µg/L	-
18	Chain Lake	Oconto	A	13.5 ft	9.5 µg/L	-
19	Long Lake	Oconto	A	14.5 ft	10.2 µg/L	-
20	Crooked Lake	Oconto	A	11 ft	11.8 µg/L	-
21	Anderson Lake	Oconto	A	10 ft	15 µg/L	-
22	Kelly Lake	Oconto	A	10 ft	14.3 µg/L	-
23	Ranch Lake	Oconto	A	12.5 ft	14.4 µg/L	-
24	Little Horn Lake	Oconto	A	13.3 ft	14.4 µg/L	-
25	Waubee Lake	Oconto	A	13.5 ft	10.5 µg/L	-
26	Deadman Lake	Oconto	A	14.1 ft	9.7 µg/L	-
27	Sunrise Lake	Oconto	A	14 ft	12.6 µg/L	-
28	Finnegan Lake	Oconto	A	10 ft	15.3 µg/L	-
29	Boundary Lake	Oconto	A	14 ft	12.1 µg/L	-
30	Pickerel Lake	Oconto	B	8 ft	15.2 µg/L	-
31	Berry Lake	Oconto	B	7.5 ft	15.3 µg/L	-
32	Bear Lake	Oconto	B	9 ft	13.8 µg/L	-
33	Grindle Lake	Oconto	B	9 ft	12.4 µg/L	-
34	Reservoir Pond	Oconto	B	9.5 ft	19.3 µg/L	-
35	Surprise Lake	Oconto	B	8 ft	13.1 µg/L	-
36	Smoke Lake	Oconto	B	7.5 ft	13 µg/L	-
37	Horn Lake	Oconto	B	8.8 ft	14.5 µg/L	-
38	Munger Lake	Oconto	B	7 ft	15.6 µg/L	-
39	Bass Lake	Oconto	B	6 ft	15.9 µg/L	-
40	Shadow Lake	Oconto	B	6 ft	18 µg/L	-
41	White Potato Lake	Oconto	B	6.5 ft	17 µg/L	-
42	Gilkey Lake	Oconto	B	6 ft	10.4 µg/L	-
43	Pickerel Lake	Oconto	C	4.5 ft	27 µg/L	-
44	Grignon Lake	Oconto	C	6 ft	22.9 µg/L	-
45	Chute Pond at	Oconto	C	6 ft	28 µg/L	-
46	Wiscobee Lake	Oconto	C	5.7 ft	22 µg/L	-
47	Christie Lake	Oconto	C	3 ft	13.1 µg/L	-
48	Cooley Lake	Oconto	C	5 ft	39.3 µg/L	-
49	Porcupine Lake-Deep Hole	Oconto	C	6.5 ft	54.3 µg/L	-
50	Moody Lake	Oconto	C	5 ft	44.1 µg/L	-

Cleanest Lakes in Oconto County, Wisconsin

Ranked List

More Answers for Oconto County, Wisconsin