Question 1

Cleanest Lakes in Linn County, Iowa?

Accepted Answer

Pleasant Creek Lake in Linn County leads the rankings on measured clarity and nutrients and 3.6 ft of clarity. Below are the top 4 cleanest monitored lakes in Linn County, Iowa, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Linn County, Iowa?

Accepted Answer

Pleasant Creek Lake in Linn County has the cleanest nutrient and algae readings in Linn County, Iowa, with 3.6 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	Pleasant Creek Lake	Linn	3.6 ft	38 µg/L	26.5 µg/L
2	Cedar Lake	Linn	0.9 ft	256.5 µg/L	125.4 µg/L
3	Big Lewis Lake	Linn	-	-	-
4	Little Lewis Lake	Linn	-	-	-

Cleanest Lakes in Linn County, Iowa

Ranked List

More Answers for Linn County, Iowa