Question 1

Cleanest Lakes in Morton County, North Dakota?

Accepted Answer

Nygren Dam Lake in Morton County leads the rankings on measured clarity and nutrients and 2.6 ft of clarity. Below are the top 5 cleanest monitored lakes in Morton County, North Dakota, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in Morton County, North Dakota?

Accepted Answer

Nygren Dam Lake in Morton County has the cleanest nutrient and algae readings in Morton County, North Dakota, with 2.6 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	Nygren Dam Lake	Morton	2.6 ft	73 µg/L	24.7 µg/L
2	Sweetbriar Dam Lake	Morton	3 ft	353 µg/L	54 µg/L
3	Fish Creek Lake	Morton	-	-	-
4	Storm Creek Lake	Morton	-	-	-
5	Crown Butte Lake	Morton	-	-	-

Cleanest Lakes in Morton County, North Dakota

Ranked List

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