What is the cleanest lake in St. Croix County, Wisconsin?

Bass Lake in St. Croix County has the cleanest nutrient and algae readings in St. Croix County, Wisconsin, with 10 feet of measured water clarity.

How are these rankings calculated?

Nutrients and algae, total phosphorus, nitrogen, chlorophyll-a and turbidity, are read against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown separately. Lakes without enough recent samples are listed without a condition class rather than ranked low. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in St. Croix County, Wisconsin

Bass Lake in St. Croix County leads the rankings on measured clarity and nutrients and 10 ft of clarity. Below are the top 18 cleanest monitored lakes in St. Croix County, Wisconsin, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Bass Lake	St. Croix	10 ft	14 µg/L	-
2	Apple Lake	St. Croix	2.5 ft	84.9 µg/L	-
3	Lake Mallalieu	St. Croix	2.8 ft	53.5 µg/L	-
4	Twin Lakes	St. Croix	-	-	-
5	Lake George	St. Croix	-	-	-
6	Glen Lake	St. Croix	-	-	-
7	Pine Lake	St. Croix	-	-	-
8	Casey Lake	St. Croix	-	-	-
9	Brushy Mound Lake	St. Croix	-	-	-
10	Three Lakes	St. Croix	-	-	-
11	Hatfield Lake	St. Croix	-	-	-
12	Oak Ridge Lake	St. Croix	-	-	-
13	Riverdale Flowage	St. Croix	-	-	-
14	Turtle Lake	St. Croix	-	-	-
15	Pine Lake	St. Croix	-	-	-
16	Little Falls Lake	St. Croix	-	-	-
17	Perch Lake	St. Croix	-	-	-
18	Dry Dam Lake	St. Croix	-	-	-

Ranked List

More Answers for St. Croix County, Wisconsin