Question 1

Cleanest Lakes in Menard County, Illinois?

Accepted Answer

Lake Petersburg in Menard County leads the rankings on measured clarity and nutrients. Below are the top 1 cleanest monitored lakes in Menard County, Illinois, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Menard County, Illinois?

Accepted Answer

Lake Petersburg in Menard County has the cleanest nutrient and algae readings in Menard County, Illinois.

Question 3

How are these rankings calculated?

Accepted Answer

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 Menard County, Illinois

Ranked List

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