Skip to main content
LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Cleanest Lakes in Valley County, Idaho

Cas Reservoir Inlet Between Lf And in Valley County leads the rankings with a water quality grade of D and 4.3 ft of clarity. Below are the top 25 cleanest monitored lakes in Valley County, Idaho, ranked by EPA water quality score.

Ranked List

#LakeCountyGradeClarityPhosphorusAlgae
1Cas Reservoir Inlet Between Lf AndValleyD4.3 ft40 µg/L12.4 µg/L
2Cascade R W of Sugarloaf Island LakeValleyD8.2 ft28.5 µg/L7.5 µg/L
3Davis ReservoirValleyNR---
4Corral Creek ReservoirValleyNR---
5Horsethief ReservoirValleyNR---
6Riordan LakeValleyNR---
7Deep LakeValleyNR---
8Loon LakeValleyNR---
9Caton LakeValleyNR---
10Warm LakeValleyNR---
11Blackmare LakeValleyNR---
12Boulder Meadows ReservoirValleyNR---
13Boulder LakeValleyNR---
14Buckhorn LakeValleyNR---
15Enos LakeValleyNR---
16Thirtythree LakeValleyNR---
17Box LakeValleyNR---
18Granite LakeValleyNR---
19Payette LakeValleyNR---
20Hait ReservoirValleyNR---
21Little Payette LakeValleyNR---
22Browns PondValleyNR---
23Cruickshank ReservoirValleyNR---
24Upper Jug Creek ReservoirValleyNR---
25Jemima K ReservoirValleyNR---

More Answers for Valley County, Idaho

All lakes in Valley County →Cleanest lakes in Idaho →

Get Valley County, Idaho water-quality updates

New grades and algae readings can change this ranking. Unsubscribe anytime.