Oneida County Lake Quality

Wisconsin, 140 lakes, average grade B (Good)

Oneida County in Wisconsin carries 140 graded lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 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 Long Lake (A); the most-stressed is Rice Lake (D).

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Quick Answers for Oneida County

Cleanest lakes in Oneida County →Cleanest lakes in Wisconsin →Safest swimming lakes in Wisconsin →

Planning a trip? Check special fishing regulations for Long Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.

DNR Reports (28)

Wisconsin DNR Fisheries Survey resources for lakes in Oneida County. Showing 12 most recent — browse all reports →

2025
Burrows Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Ginty Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Horsehead Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Killarney Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Stella Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Swamp Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Thompson Lake spring summary report, 2025
Fisheries Survey · WI DNR · 2025 (PDF)
2025
Tomahawk River smallmouth bass survey, 2025
Fisheries Survey · WI DNR · 2025 (PDF)
2025
Townline Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2025
Turtle Lake spring shocking survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2024
Big Carr Lake fisheries summary, 2024
Fisheries Survey · WI DNR · 2024 (PDF)
2024
Flannery and Velvet lakes spring shocking survey, 2024
Spring Shocking Survey · WI DNR · 2024 (PDF)

All Lakes in Oneida County

Rank	Lake	Grade	Clarity	Max Depth	Phosphorus
1	Long Lake	A	41 ft	58 ft	-
2	Long Lake	A	36.9 ft	31 ft	-
3	Stella Lake	A	26.2 ft	22 ft	14.4 µg/L
4	Birch Lake	A	29.2 ft	27 ft	-
5	Shishebogama Lake	A	32.8 ft	-	13.8 µg/L
6	Bass Lake	A	26.2 ft	-	-
7	Bass Lake	A	23 ft	-	-
8	Bear Lake	A	27.7 ft	20 ft	18 µg/L
9	Planting Ground Lake	A	17.2 ft	37 ft	-
10	Upper Kaubashine Lake	A	59.1 ft	56 ft	12 µg/L
11	Spirit Lake	A	39.4 ft	39 ft	11.4 µg/L
12	Buffalo Lake	A	48.4 ft	27 ft	-
13	Lee Lake	A	71.4 ft	44 ft	7.7 µg/L
14	Townline Lake	A	26.2 ft	25 ft	-
15	Booth Lake	A	32.8 ft	34 ft	-
16	Clear Lake	A	29.5 ft	15 ft	-
17	Clear Lake	A	-	95 ft	10.8 µg/L
18	Crescent Lake	A	45.9 ft	-	13.1 µg/L
19	Mercer Lake	A	24.6 ft	23 ft	-
20	Indian Lake	A	36.1 ft	26 ft	13.8 µg/L
21	Lone Stone Lake	A	46.8 ft	30 ft	11.5 µg/L
22	Thunder Lake	A	16.4 ft	9 ft	-
23	Virgin Lake	A	20.5 ft	31 ft	18.1 µg/L
24	Two Sisters Lake	A	64.1 ft	-	10.6 µg/L
25	Franklin Lake	A	53.3 ft	-	12.3 µg/L
26	Blue Lake	A	73.8 ft	49 ft	10.5 µg/L
27	Sugar Camp Lake	A	57.4 ft	-	10.3 µg/L
28	Rhinelander Flowage Lake	A	17.2 ft	-	-
29	Flannery Lake	A	47.6 ft	35 ft	12.7 µg/L
30	Alva Lake	A	62.8 ft	43 ft	11.5 µg/L
31	Squash Lake	A	55.8 ft	74 ft	9.6 µg/L
32	Deep Hole Lake	A	45.9 ft	24 ft	10.6 µg/L
33	Whitefish Lake	A	24.6 ft	33 ft	16 µg/L
34	Tom Doyle Lake	A	22.1 ft	30 ft	13.3 µg/L
35	Crystal Lake	A	82 ft	43 ft	-
36	Hasbrook Lake	A	68.9 ft	50 ft	10.3 µg/L
37	Manson Lake	A	39.4 ft	54 ft	11.7 µg/L
38	Minocqua Lake	A	49.2 ft	60 ft	13.7 µg/L
39	Perch Lake	A	48.4 ft	56 ft	14.5 µg/L
40	Lower Kaubashine Lake	A	44 ft	36 ft	11.1 µg/L
41	Muskellunge Lake	A	19.7 ft	24 ft	-
42	Bolger Lake	A	54.1 ft	45 ft	-
43	Sureshot Lake	A	45.9 ft	27 ft	-
44	Pelican Lake	A	21.3 ft	39 ft	-
45	Velvet Lake	A	41 ft	-	14.6 µg/L
46	Mildred Lake	A	62.3 ft	45 ft	10.7 µg/L
47	Lake Seventeen	A	39.4 ft	37 ft	-
48	Hodstradt Lake	A	62.3 ft	36 ft	-
49	Gilmore Lake	A	27.9 ft	24 ft	-
50	Bird Lake	A	55.8 ft	40 ft	-
51	Lake Julia	A	30.3 ft	19 ft	14.3 µg/L
52	Lake Julia	A	23 ft	45 ft	11.2 µg/L
53	East Horsehead Lake	A	45.9 ft	27 ft	-
54	West Horsehead Lake	A	31.2 ft	23 ft	-
55	Snowden Lake	A	23 ft	-	-
56	East Twin Lake	A	30.3 ft	17 ft	-
57	West Twin Lake	A	39.4 ft	-	-
58	Hodag Lake	A	34.9 ft	20 ft	-
59	Hemlock Lake	A	49.2 ft	25 ft	-
60	Emma Lake	A	18.9 ft	17 ft	-
61	Maple Lake	A	41 ft	-	15.8 µg/L
62	Clearwater Lake	A	55 ft	48 ft	10 µg/L
63	Dorothy Lake	A	55.8 ft	35 ft	-
64	Hanson Lake	A	41.3 ft	23 ft	-
65	Hill Lake	A	39.4 ft	40 ft	-
66	Hawk Lake	A	23 ft	27 ft	-
67	Unnamed Lake	A	35.7 ft	-	-
68	Washburn Lake	A	23.8 ft	27 ft	18.7 µg/L
69	Prairie Lake	A	29.5 ft	-	-
70	Moccasin Lake	A	20.8 ft	19 ft	18.7 µg/L
71	Wind Pudding Lake	A	64 ft	35 ft	-
72	Nose Lake	A	39.4 ft	-	10.8 µg/L
73	Buckskin Lake	A	27.9 ft	22 ft	-
74	Unnamed Lake -Deep Hole	A	18.8 ft	-	-
75	Little Carr Lake	A	39.4 ft	30 ft	-
76	Oscar Jenny Lake	A	29.2 ft	24 ft	12.6 µg/L
77	Big Carr Lake	A	42.7 ft	75 ft	-
78	Great Bass Lake	A	34.5 ft	24 ft	14.2 µg/L
79	Clear Lake Sec. 24 T37n R7e	A	31 ft	-	14.5 µg/L
80	Mars Lake	A	16.4 ft	24 ft	-
81	North Nokomis Lake	A	26.2 ft	73 ft	-
82	Katherine Lake	A	45.9 ft	30 ft	-
83	Cunard Lake	A	39.4 ft	23 ft	-
84	Sweeney Lake	A	17.1 ft	18 ft	-
85	Burrows Lake	A	25 ft	28 ft	-
86	Mcnutt Lake	A	39.4 ft	38 ft	-
87	Timber Lake	A	31.2 ft	28 ft	-
88	Bass Lake	A	19.7 ft	20 ft	21 µg/L
89	Hancock Lake	A	17.2 ft	22 ft	25.4 µg/L
90	Island Lake	A	23 ft	26 ft	21.5 µg/L
91	Townline Lake	A	19.7 ft	19 ft	29.2 µg/L
92	Bearskin Lake	A	19.7 ft	26 ft	24.2 µg/L
93	George Lake	A	16.4 ft	26 ft	22.4 µg/L
94	Mid Lake	A	24.3 ft	-	24.5 µg/L
95	Little Fork Lake	A	19.4 ft	34 ft	21.2 µg/L
96	Little Bearskin Lake	A	27.2 ft	27 ft	22.7 µg/L
97	Oneida Lake	A	26.2 ft	34 ft	23.1 µg/L
98	Boom Lake	B	14.8 ft	30 ft	-
99	Round Lake	B	14.4 ft	15 ft	20.9 µg/L
100	Shepard Lake	B	14.8 ft	18 ft	-
101	Diamond Lake	B	12.5 ft	17 ft	25.4 µg/L
102	Hat Rapids Flowage Lake	B	11.5 ft	-	-
103	Second Lake	B	13.1 ft	11 ft	-
104	Deer Lake	B	13.1 ft	20 ft	26 µg/L
105	Horsehead Lake	B	20.1 ft	11 ft	30 µg/L
106	Cranberry Lake	B	15.1 ft	23 ft	30.8 µg/L
107	Dog Lake	B	13.1 ft	22 ft	25.1 µg/L
108	Lake Thompson	B	13.1 ft	30 ft	22.4 µg/L
109	Deep Hole Lake	B	13.9 ft	-	21.3 µg/L
110	Swamp Lake	B	10.7 ft	8 ft	-
111	Willow Lake	B	13.1 ft	-	-
112	Perch Lake	B	13.6 ft	21 ft	-
113	Fuller Lake	B	13.9 ft	-	24.8 µg/L
114	Third Lake	B	11.5 ft	14 ft	-
115	Rhinelander Flowage Lake	B	13.1 ft	10 ft	-
116	Laurel Lake	B	12.3 ft	-	25.1 µg/L
117	Tomahawk Riverlake Nokomis	B	13.1 ft	33 ft	-
118	Madeline Lake	B	13.1 ft	17 ft	-
119	Amber Lake	B	11.5 ft	-	-
120	Fourmile Lake	B	9.8 ft	29 ft	28.9 µg/L
121	Lake Nokomis	B	11.8 ft	33 ft	36.2 µg/L
122	Kathan Lake	B	9.8 ft	15 ft	29.8 µg/L
123	Indian Lake	C	-	-	33.5 µg/L
124	Thunder Lake	C	8.2 ft	12 ft	33.1 µg/L
125	Crystal Lake	C	7.8 ft	9 ft	47.4 µg/L
126	Moen Lake	C	9.8 ft	11 ft	31.1 µg/L
127	Margaret Lake	C	8.2 ft	14 ft	-
128	Spur Lake	C	6.6 ft	-	22.7 µg/L
129	Big Stone Lake	C	6.1 ft	57 ft	22.5 µg/L
130	Carrol Lake	C	8.2 ft	27 ft	-
131	Lake Creek	C	8.2 ft	12 ft	-
132	Spruce Lake	C	8.2 ft	15 ft	-
133	Gust Lake	C	4.9 ft	6 ft	49.3 µg/L
134	Ginty Lake	C	4.9 ft	12 ft	48.2 µg/L
135	Rice Lake	D	4.9 ft	3 ft	-
136	Unnamed Lake	D	6.6 ft	-	-
137	Unnamed Lake	D	4.5 ft	-	72.5 µg/L
138	Killarney Lake	D	5.7 ft	8 ft	-
139	Neptune Lake	D	6.6 ft	7 ft	-
140	Jennie Weber Lake	D	4.9 ft	8 ft	-

Source: EPA National Aquatic Resource Surveys, 2026.