What is the cleanest lake in Waukesha County, Wisconsin?

Silver Lake in Waukesha County has the cleanest nutrient and algae readings in Waukesha 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 Waukesha County, Wisconsin

Silver Lake in Waukesha County leads the rankings on measured clarity and nutrients and 10 ft of clarity. Below are the top 39 cleanest monitored lakes in Waukesha County, Wisconsin, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Silver Lake	Waukesha	10 ft	11.8 µg/L	-
2	Ashippun Lake	Waukesha	10 ft	13 µg/L	-
3	Ottawa Lake	Waukesha	13 ft	14.6 µg/L	-
4	Crooked Lake	Waukesha	8 ft	16.5 µg/L	-
5	North Lake	Waukesha	8 ft	17.9 µg/L	-
6	Pretty Lake	Waukesha	12.2 ft	12.2 µg/L	-
7	Pewaukee Lake	Waukesha	7.5 ft	19.9 µg/L	-
8	Hunters Lake	Waukesha	9.5 ft	15.9 µg/L	-
9	Lac la Belle Lake	Waukesha	4.8 ft	14.7 µg/L	-
10	Lake Keesus	Waukesha	9.2 ft	15.8 µg/L	-
11	Eagle Spring Lake	Waukesha	4.5 ft	17.9 µg/L	-
12	Oconomowoc Lake	Waukesha	12.5 ft	11.9 µg/L	-
13	School Section Lake	Waukesha	6.2 ft	26.2 µg/L	-
14	Lower Nashotah Lake	Waukesha	9 ft	11.3 µg/L	-
15	Lower Nemahbin Lake	Waukesha	10.9 ft	10.9 µg/L	-
16	Denoon Lake	Waukesha	9 ft	24.7 µg/L	-
17	Pine Lake	Waukesha	25 ft	12.2 µg/L	-
18	Fowler Lake	Waukesha	14.5 ft	15.5 µg/L	-
19	Upper Nemahbin Lake	Waukesha	12 ft	13.7 µg/L	-
20	Nagawicka Lake	Waukesha	9.5 ft	13.5 µg/L	-
21	Lower Phantom Lake	Waukesha	6.7 ft	15.7 µg/L	-
22	Golden Lake	Waukesha	12.8 ft	14.4 µg/L	-
23	Okauchee Lake Site	Waukesha	4.6 ft	16.2 µg/L	-
24	Muskego Lake	Waukesha	-	59.4 µg/L	-
25	Phantom Lake	Waukesha	-	-	-
26	Rainbow Springs Lake	Waukesha	-	-	-
27	Saylesville Millpond	Waukesha	-	-	-
28	Dutchman Lake	Waukesha	-	-	-
29	Waterville Lake	Waukesha	-	-	-
30	Upper Genesee Lake	Waukesha	-	-	-
31	Upper Nashotah Lake	Waukesha	-	-	-
32	Funks Millpond	Waukesha	-	-	-
33	Moose Lake	Waukesha	-	-	-
34	Grass Lake	Waukesha	-	-	-
35	Upper Oconomowoc Lake	Waukesha	-	-	-
36	Tamarack Lake	Waukesha	-	-	-
37	Lower Genesee Lake	Waukesha	-	-	-
38	Middle Genesee Lake	Waukesha	-	-	-
39	Larkin Lake	Waukesha	-	-	-

Ranked List

More Answers for Waukesha County, Wisconsin