Recently Monitored Lakes

The 100 most recently sampled lakes in our dataset. Sample dates come from the EPA Water Quality Portal, which aggregates data from state DNR, USGS, tribal, and citizen-science monitoring networks. New samples appear here as data is processed (typically a multi-month lag from collection to public release).

#	Lake	County	State	Grade	Clarity	Depth	Last Sampled
1	Moen Lake	Oneida	Wisconsin	D	2.8 ft	11 ft	2026-07-11
2	Pedlar River Reservoir	Amherst	Virginia	A	7.5 ft	-	2026-07-09
3	Mill Cr Reservoir	Amherst	Virginia	B	3.6 ft	-	2026-07-08
4	South Holston Lake	Washington	Virginia	B	7.2 ft	-	2026-07-08
5	Northeast Arm of Mill Creek Lake	Amherst	Virginia	B	4.1 ft	-	2026-07-08
6	Mill Creek Reservoir	Amherst	Virginia	B	3.6 ft	-	2026-07-08
7	North Arm of Mill Creek Lake	Amherst	Virginia	B	3.6 ft	-	2026-07-08
8	Lake Anna	Spotsylvania	Virginia	C	3.3 ft	-	2026-07-07
9	Dam Lake	Pulaski	Virginia	B	8.5 ft	-	2026-07-07
10	Peak Creek Lake	Pulaski	Virginia	B	5.6 ft	-	2026-07-07
11	State Park Lake	Pulaski	Virginia	B	7.5 ft	-	2026-07-07
12	Mouth Peak Cr. Lake	Pulaski	Virginia	B	6.9 ft	-	2026-07-07
13	Dublin Water Works Lake	Pulaski	Virginia	B	7.2 ft	-	2026-07-07
14	Lake Frederick	Frederick	Virginia	A	9.8 ft	-	2026-07-07
15	Lowmans Ferry Rd Br. Lake	Pulaski	Virginia	B	4.6 ft	-	2026-07-07
16	Upper Branch of Terry'S Run Lake	Spotsylvania	Virginia	D	0.7 ft	-	2026-07-07
17	Dam Lake	Alleghany	Virginia	A	12.1 ft	-	2026-07-06
18	Bolar Mtn. Campground Lake	Bath	Virginia	A	9.2 ft	-	2026-07-06
19	Mouth Big Lick Cr. Lake	Alleghany	Virginia	A	12.5 ft	-	2026-07-06
20	Mcclintic Pt. Lake	Bath	Virginia	B	4.6 ft	-	2026-07-06
21	Brunswick County Lake	Brunswick	Virginia	C	2.3 ft	-	2026-06-30
22	Great Creek Reservoir	Brunswick	Virginia	C	3.1 ft	-	2026-06-30
23	Nottoway Lake	Nottoway	Virginia	C	3.3 ft	-	2026-06-30
24	Briery Creek Lake Upper End of Lake Prin	Prince Edward	Virginia	B	3.9 ft	-	2026-06-29
25	Sandy River Lake	Prince Edward	Virginia	B	3.3 ft	-	2026-06-29
26	Lake Gaston	Mecklenburg	Virginia	B	4.3 ft	-	2026-06-25
27	Swift Creek Reservoir	Chesterfield	Virginia	C	3 ft	-	2026-06-25
28	Goose Creek Reservoir	Loudoun	Virginia	B	2.1 ft	-	2026-06-25
29	Beaverdam Creek Reservoir	Loudoun	Virginia	A	5.4 ft	-	2026-06-25
30	Wheeler Lake	Oconto	Wisconsin	A	27 ft	35 ft	2026-06-24
31	John Flannagan Reservoir@ Dam	Dickenson	Virginia	A	17.1 ft	-	2026-06-24
32	John Flannagan Reservoir	Dickenson	Virginia	A	13.1 ft	-	2026-06-24
33	Spencer Lake	Waupaca	Wisconsin	B	8.5 ft	53 ft	2026-06-23
34	Cranberry Lake	Oneida	Wisconsin	C	4.5 ft	23 ft	2026-06-23
35	Berry Lake	Oconto	Wisconsin	B	7.5 ft	27 ft	2026-06-23
36	Rock Lake	Kenosha	Wisconsin	A	10 ft	33 ft	2026-06-23
37	Lake Emily	Dodge	Wisconsin	C	3.5 ft	10 ft	2026-06-23
38	Island Lake	Oneida	Wisconsin	B	7 ft	26 ft	2026-06-23
39	Jordan Lake	Adams	Wisconsin	A	13 ft	92 ft	2026-06-23
40	Sand Lake	Iron	Wisconsin	B	14.2 ft	35 ft	2026-06-23
41	Viola Lake	Burnett	Wisconsin	A	17 ft	34 ft	2026-06-23
42	Lake Waubesa	Dane	Wisconsin	D	3.2 ft	38 ft	2026-06-23
43	Meta Lake	Vilas	Wisconsin	A	10.5 ft	25 ft	2026-06-23
44	Turtle Lake	Walworth	Wisconsin	A	11 ft	30 ft	2026-06-23
45	Wood Lake	Marquette	Wisconsin	A	14.2 ft	53 ft	2026-06-23
46	Spring Lake	Manitowoc	Wisconsin	B	8 ft	23 ft	2026-06-23
47	Friendship Lake	Adams	Wisconsin	C	4 ft	15 ft	2026-06-23
48	Grand Lake	Delaware	Oklahoma	F	1.6 ft	-	2026-06-23
49	Chickahominy Lake	Charles City	Virginia	C	2.6 ft	-	2026-06-23
50	Bass Lake	Barron	Wisconsin	A	10 ft	14 ft	2026-06-22
51	Oxbow Lake	Vilas	Wisconsin	B	8 ft	44 ft	2026-06-22
52	Lake Montanis	Barron	Wisconsin	D	2 ft	14 ft	2026-06-22
53	Rock Lake	Jefferson	Wisconsin	A	12 ft	60 ft	2026-06-22
54	White Lake	Marquette	Wisconsin	A	17 ft	60 ft	2026-06-22
55	Spring Lake	Portage	Wisconsin	B	8.8 ft	42 ft	2026-06-22
56	Tree Lake	Portage	Wisconsin	B	7.4 ft	33 ft	2026-06-22
57	Bullhead Lake	Manitowoc	Wisconsin	D	4.5 ft	40 ft	2026-06-22
58	Red Lake	Douglas	Wisconsin	A	12 ft	37 ft	2026-06-22
59	Lake Helen	Portage	Wisconsin	B	7.5 ft	20 ft	2026-06-22
60	Fountain Lake	Portage	Wisconsin	A	21 ft	23 ft	2026-06-22
61	Arbutus Lake	Forest	Wisconsin	A	16 ft	28 ft	2026-06-22
62	Elsie Lake	Vilas	Wisconsin	B	13.5 ft	22 ft	2026-06-22
63	Plum Lake	Vilas	Wisconsin	A	14.2 ft	57 ft	2026-06-21
64	Tainter Lake	Dunn	Wisconsin	D	3.7 ft	37 ft	2026-06-21
65	Bone Lake	Polk	Wisconsin	B	7.5 ft	43 ft	2026-06-21
66	Bear Lake	Forest	Wisconsin	B	5.6 ft	20 ft	2026-06-21
67	Deer Lake	Polk	Wisconsin	A	16 ft	46 ft	2026-06-21
68	Potato Lake	Rusk	Wisconsin	F	3 ft	-	2026-06-21
69	Fox Lake	Dodge	Wisconsin	F	2 ft	19 ft	2026-06-21
70	Solberg Lake	Price	Wisconsin	D	2.9 ft	16 ft	2026-06-21
71	Lake Ellen	Sheboygan	Wisconsin	B	9 ft	42 ft	2026-06-21
72	Crane Lake	Forest	Wisconsin	B	7 ft	25 ft	2026-06-21
73	Sand Lake	Sawyer	Wisconsin	B	10 ft	50 ft	2026-06-21
74	Tahkodah Lake	Bayfield	Wisconsin	A	10 ft	-	2026-06-21
75	Muskellunge Lake	Vilas	Wisconsin	C	4 ft	19 ft	2026-06-21
76	Lake Five	Washington	Wisconsin	A	12 ft	23 ft	2026-06-21
77	Person Lake	Douglas	Wisconsin	B	7.6 ft	8 ft	2026-06-21
78	Des Moines Lake	Burnett	Wisconsin	A	18.9 ft	37 ft	2026-06-21
79	Brandy Lake	Vilas	Wisconsin	B	13 ft	44 ft	2026-06-21
80	Turtle Flambeau Flowage Lake	Iron	Wisconsin	B	6 ft	-	2026-06-20
81	Petenwell Flowage Lake	Juneau	Wisconsin	D	2.3 ft	44 ft	2026-06-20
82	Shawano Lake	Shawano	Wisconsin	C	5.9 ft	39.5 ft	2026-06-20
83	Loveless Lake	Polk	Wisconsin	B	8.5 ft	20 ft	2026-06-20
84	Smith Lake	Washington	Wisconsin	D	4 ft	5 ft	2026-06-20
85	Pickerel Lake	Oconto	Wisconsin	B	8 ft	10 ft	2026-06-19
86	North Turtle Lake	Vilas	Wisconsin	B	8.4 ft	58 ft	2026-06-19
87	Little Pickerel Lake	Oconto	Wisconsin	A	11 ft	20 ft	2026-06-19
88	Crooked Lake	Waukesha	Wisconsin	B	8 ft	16 ft	2026-06-19
89	Rice Lake	Walworth	Wisconsin	D	1.7 ft	10 ft	2026-06-19
90	Chain Lake	Chippewa	Wisconsin	C	7.3 ft	74 ft	2026-06-19
91	Rock Lake	Vilas	Wisconsin	C	6.2 ft	18 ft	2026-06-19
92	Samoset Lake	Bayfield	Wisconsin	A	15 ft	40 ft	2026-06-19
93	Mud Lake	Jefferson	Wisconsin	D	2.3 ft	22 ft	2026-06-19
94	Lake Wilipyro	Bayfield	Wisconsin	A	10.5 ft	25 ft	2026-06-19
95	Smoke Lake	Oconto	Wisconsin	B	7.6 ft	-	2026-06-19
96	Lower Spring Lake	Jefferson	Wisconsin	C	4.5 ft	-	2026-06-19
97	Pickerel Lake	Portage	Wisconsin	C	9.5 ft	12 ft	2026-06-18
98	Big Eau Pleine Lake	Marathon	Wisconsin	F	1.5 ft	-	2026-06-18
99	Carlin Lake	Vilas	Wisconsin	A	21 ft	36 ft	2026-06-18
100	Wolf Lake	Portage	Wisconsin	C	9 ft	17 ft	2026-06-18

Source: EPA Water Quality Portal. Sample dates reflect when monitoring crews collected water samples — typically there is a multi-month lag before the data appears in the federal portal.