Question 1

Cleanest Lakes in Madison County, Iowa?

Accepted Answer

Badger Creek Max Depth Lake in Madison County leads the rankings on measured clarity and nutrients and 1.6 ft of clarity. Below are the top 2 cleanest monitored lakes in Madison County, Iowa, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Madison County, Iowa?

Accepted Answer

Badger Creek Max Depth Lake in Madison County has the cleanest nutrient and algae readings in Madison County, Iowa, with 1.6 feet of measured water clarity.

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.

#	Lake	County	Clarity	Phosphorus	Algae
1	Badger Creek Max Depth Lake	Madison	1.6 ft	149 µg/L	77.7 µg/L
2	Cedar Lake	Madison	1.6 ft	98 µg/L	62.7 µg/L

Cleanest Lakes in Madison County, Iowa

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