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

Kittitas County Lake Quality

Washington, 20 lakes — no lake here has enough monitoring data for a grade

There are 20 monitored lakes in Kittitas County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. No lake in Kittitas County has enough sampling behind it for an A–F grade yet. The 20 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.

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Where to stay near Kittitas County

Top-rated places to stay near Kittitas County

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All Lakes in Kittitas County

20 lakes · 0 graded, 20 not rated0 graded lakes · 20 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
NRManastash LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMirror LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLost LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRachel LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpectacle LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJoe LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRAlaska LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake RowenaKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShovel LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpade LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCircle LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRVenus LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDeep LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWaptus LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPete LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCooper LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake EastonKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRTucquala LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHyas LakeKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRobin LakesKittitasNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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See how Kittitas County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: EPA National Aquatic Resource Surveys, 2026.