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

Cleanest Lakes in Snohomish County, Washington

Lake Janus in Snohomish County leads the rankings with a water quality grade of NR. Below are the top 46 cleanest monitored lakes in Snohomish County, Washington, ranked by EPA water quality score.

Ranked List

#LakeCountyGradeClarityPhosphorusAlgae
1Lake JanusSnohomishNR---
2Pear LakeSnohomishNR---
3Lake SereneSnohomishNR---
4Sunset LakeSnohomishNR---
5Lake IsabelSnohomishNR---
6Tomtit LakeSnohomishNR---
7Dagger LakeSnohomishNR---
8Lake HannanSnohomishNR---
9Lake FontalSnohomishNR---
10Hanson SloughSnohomishNR---
11Crystal LakeSnohomishNR---
12Lake BallingerSnohomishNR---
13Silver LakeSnohomishNR---
14Lake SereneSnohomishNR---
15Riley LakeSnohomishNR---
16Irvine SloughSnohomishNR---
17Sunday LakeSnohomishNR---
18Lake KiSnohomishNR---
19Crabapple LakeSnohomishNR---
20Lake ShoecraftSnohomishNR---
21Lake HowardSnohomishNR---
22Lake MarthaSnohomishNR---
23Blackmans LakeSnohomishNR---
24Storm LakeSnohomishNR---
25Flowing LakeSnohomishNR---
26Panther LakeSnohomishNR---
27Bosworth LakeSnohomishNR---
28Lake CassidySnohomishNR---
29Lake StevensSnohomishNR---
30Lake ArmstrongSnohomishNR---
31Twin LakesSnohomishNR---
32Boardman LakeSnohomishNR---
33Lake TwentytwoSnohomishNR---
34Lake ChaplainSnohomishNR---
35Lake CochranSnohomishNR---
36Wallace LakeSnohomishNR---
37Big Greider LakeSnohomishNR---
38Spada LakeSnohomishNR---
39Copper LakeSnohomishNR---
40Silver LakeSnohomishNR---
41Blanca LakeSnohomishNR---
42Twin LakesSnohomishNR---
43Goat LakeSnohomishNR---
44Lake ByrneSnohomishNR---
45North LakeSnohomishNR---
46Helena LakeSnohomishNR---

More Answers for Snohomish County, Washington

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