What is the cleanest lake in Ramsey County, Minnesota?

Birch Lake in Ramsey County is the highest-rated lake in Ramsey County, Minnesota with an EPA water quality grade of A and 5.9 feet of water clarity.

How are these rankings calculated?

Lakes are graded A through F on nutrients and algae — total phosphorus, nitrogen, chlorophyll-a, and turbidity — against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Ramsey County, Minnesota

Birch Lake in Ramsey County leads the rankings with a water quality grade of A and 5.9 ft of clarity. Below are the top 48 cleanest monitored lakes in Ramsey County, Minnesota, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Birch Lake	Ramsey	A	5.9 ft	21 µg/L	3.3 µg/L
2	Otter Lake	Ramsey	A	11.5 ft	22 µg/L	2.7 µg/L
3	Snail Lake	Ramsey	A	11 ft	20 µg/L	4.5 µg/L
4	Turtle Lake	Ramsey	A	7.5 ft	22 µg/L	5.2 µg/L
5	East Vadnais Lake	Ramsey	A	-	23 µg/L	3.3 µg/L
6	Twin Lake	Ramsey	C	7.5 ft	35 µg/L	8.3 µg/L
7	Mccarron Lake	Ramsey	C	11.5 ft	30 µg/L	6 µg/L
8	Phalen Lake	Ramsey	C	8.1 ft	34 µg/L	8.7 µg/L
9	Gem Lake	Ramsey	C	6.9 ft	36 µg/L	11.6 µg/L
10	Sucker Lake	Ramsey	C	5.9 ft	37 µg/L	5.7 µg/L
11	Wabasso Lake	Ramsey	C	13 ft	31 µg/L	5.3 µg/L
12	Deep Lake	Ramsey	C	3.9 ft	72 µg/L	6.3 µg/L
13	Owasso Lake	Ramsey	C	7.4 ft	27 µg/L	9.3 µg/L
14	Loeb Lake	Ramsey	C	11.2 ft	29 µg/L	4 µg/L
15	Black Lake	Ramsey	C	6.9 ft	36 µg/L	5.3 µg/L
16	Charley Lake	Ramsey	D	4.6 ft	59 µg/L	8.4 µg/L
17	Round Lake	Ramsey	D	8 ft	53 µg/L	10.1 µg/L
18	Johanna Lake	Ramsey	D	6.6 ft	41 µg/L	8 µg/L
19	Bennett Lake	Ramsey	D	4.9 ft	106 µg/L	20 µg/L
20	Beaver Lake	Ramsey	D	7.7 ft	45.5 µg/L	9.2 µg/L
21	Island Lake	Ramsey	D	3.3 ft	69 µg/L	28.6 µg/L
22	Silver Lake	Ramsey	D	7 ft	52 µg/L	7.5 µg/L
23	Pleasant Lake	Ramsey	D	5.6 ft	54 µg/L	11.6 µg/L
24	Crosby Lake	Ramsey	D	6.6 ft	133.5 µg/L	10.9 µg/L
25	South Long Lake	Ramsey	D	3.9 ft	46 µg/L	22.8 µg/L
26	Wilkinson Lake	Ramsey	D	3.9 ft	108 µg/L	9.2 µg/L
27	Bald Eagle Lake	Ramsey	D	5.6 ft	34 µg/L	21.7 µg/L
28	Upper Lake	Ramsey	D	6.2 ft	188 µg/L	9.7 µg/L
29	Kohlman Lake	Ramsey	D	3.6 ft	96 µg/L	24 µg/L
30	Wakefield Lake	Ramsey	D	5.9 ft	53 µg/L	8.5 µg/L
31	Spring Lake	Ramsey	D	3.1 ft	44 µg/L	23.8 µg/L
32	Gilfillan Lake	Ramsey	D	3 ft	47 µg/L	28.5 µg/L
33	Gervais Lake	Ramsey	D	5 ft	39 µg/L	15.5 µg/L
34	Josephine Lake	Ramsey	D	8.5 ft	42 µg/L	8.7 µg/L
35	Keller Lake	Ramsey	D	4.3 ft	50 µg/L	15.6 µg/L
36	North Long Lake	Ramsey	F	2.5 ft	102 µg/L	30.9 µg/L
37	Pike Lake	Ramsey	F	2.3 ft	124 µg/L	53.6 µg/L
38	Silver Lake	Ramsey	F	3.6 ft	85 µg/L	39.8 µg/L
39	Goose Lake	Ramsey	F	0.7 ft	173.5 µg/L	139 µg/L
40	Como Lake	Ramsey	F	2.5 ft	96 µg/L	42.5 µg/L
41	Vadnais Lake	Ramsey	F	1 ft	90 µg/L	88.1 µg/L
42	Willow Lake	Ramsey	NR	-	-	-
43	Sandy Lake	Ramsey	NR	-	-	-
44	Pigs Eye Lake	Ramsey	NR	-	-	-
45	Rush Lake	Ramsey	NR	-	-	-
46	Round Lake	Ramsey	NR	-	-	-
47	Marsden Lake	Ramsey	NR	-	-	-
48	Poplar Lake	Ramsey	NR	-	-	-

Ranked List

More Answers for Ramsey County, Minnesota