What is the cleanest lake in Cass County, Illinois?

Finger Lake in Cass County has the cleanest nutrient and algae readings in Cass County, Illinois.

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 Cass County, Illinois

Finger Lake in Cass County leads the rankings on measured clarity and nutrients. Below are the top 5 cleanest monitored lakes in Cass County, Illinois, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Finger Lake	Cass	-	-	-
2	Meyers Pond	Cass	-	-	-
3	Swamp Slough	Cass	-	-	-
4	Sangamon Bay	Cass	-	-	-
5	Eagle Lake	Cass	-	-	-

Ranked List

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