Question 1

Cleanest Lakes in San Juan County, Utah?

Accepted Answer

Recapture Reservoir in San Juan County leads the rankings on measured clarity and nutrients and 8.9 ft of clarity. Below are the top 5 cleanest monitored lakes in San Juan County, Utah, ranked on EPA nutrient and algae measurements.

Question 2

What is the cleanest lake in San Juan County, Utah?

Accepted Answer

Recapture Reservoir in San Juan County has the cleanest nutrient and algae readings in San Juan County, Utah, with 8.9 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	Recapture Reservoir	San Juan	8.9 ft	15.1 µg/L	1.7 µg/L
2	Lake Powell Off Cha Canyon	San Juan	13.1 ft	9.4 µg/L	-
3	TexasGulf Potash Pond Three A	San Juan	-	-	-
4	TexasGulf Potash Pond Three B	San Juan	-	-	-
5	Dugout Reservoir	San Juan	-	-	-

Cleanest Lakes in San Juan County, Utah

Ranked List

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