Question 1

Cleanest Lakes in Cerro Gordo County, Iowa?

Accepted Answer

Blue Pit Lake in Cerro Gordo County leads the rankings on measured clarity and nutrients and 17.1 ft of clarity. Below are the top 6 cleanest monitored lakes in Cerro Gordo County, Iowa, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Cerro Gordo County, Iowa?

Accepted Answer

Blue Pit Lake in Cerro Gordo County has the cleanest nutrient and algae readings in Cerro Gordo County, Iowa, with 17.1 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	Blue Pit Lake	Cerro Gordo	17.1 ft	20 µg/L	2.4 µg/L
2	Clear Lake	Cerro Gordo	2.1 ft	52 µg/L	26.4 µg/L
3	Black Pit Lake	Cerro Gordo	5.6 ft	55.3 µg/L	39.7 µg/L
4	Fin And Feather Lake	Cerro Gordo	2.3 ft	112 µg/L	42 µg/L
5	Zerbel Slough	Cerro Gordo	-	-	-
6	Mallard Marsh Swamp	Cerro Gordo	-	-	-

Cleanest Lakes in Cerro Gordo County, Iowa

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