What is the cleanest lake in Washington County, Idaho?

Crane Creek Reservoir in Washington County has the cleanest nutrient and algae readings in Washington County, Idaho.

How are these rankings calculated?

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.

Cleanest Lakes in Washington County, Idaho

Crane Creek Reservoir in Washington County leads the rankings on measured clarity and nutrients. Below are the top 8 cleanest monitored lakes in Washington County, Idaho, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Crane Creek Reservoir	Washington	-	-	-
2	Little Crane Creek Reservoir	Washington	-	-	-
3	Fairchild Reservoir	Washington	-	-	-
4	Mann Creek Reservoir	Washington	-	-	-
5	Barton Reservoir	Washington	-	-	-
6	Buttermilk Slough	Washington	-	-	-
7	Paddock Valley Reservoir	Washington	-	-	-
8	Soulen Reservoir	Washington	-	-	-

Ranked List

More Answers for Washington County, Idaho