Question 1

Cleanest Lakes in Black Hawk County, Iowa?

Accepted Answer

Mitchell Lake in Black Hawk County leads the rankings on measured clarity and nutrients and 2.3 ft of clarity. Below are the top 6 cleanest monitored lakes in Black Hawk County, Iowa, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Black Hawk County, Iowa?

Accepted Answer

Mitchell Lake in Black Hawk County has the cleanest nutrient and algae readings in Black Hawk County, Iowa, with 2.3 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	Mitchell Lake	Black Hawk	2.3 ft	40.5 µg/L	18.7 µg/L
2	Green Belt Lake	Black Hawk	2.4 ft	57 µg/L	18.6 µg/L
3	Meyers Lake	Black Hawk	1.1 ft	183.5 µg/L	116.5 µg/L
4	South Prairie Lake	Black Hawk	1.6 ft	104.5 µg/L	66.9 µg/L
5	Alice Wyth Lake	Black Hawk	1.6 ft	183 µg/L	101.6 µg/L
6	Hanson Lake	Black Hawk	-	-	-

Cleanest Lakes in Black Hawk County, Iowa

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