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

Lane County Lake Quality

Oregon, 41 lakes, measured by Oregon DEQ

The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. 3 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Lane County carry favourable nutrient and algae readings for Oregon.

The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Cougar Lake.

Loading map…

Where to stay near Lane County

Top-rated places to stay near Lane County

Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Lane County?

Get lake water-quality updates plus the best cabin & lodging deals near Lane County — straight to your inbox. No spam, unsubscribe anytime.

Quick Answers for Lane County

Cleanest lakes in Lane County →Cleanest lakes in Oregon →Best swimming lakes in Oregon →

Planning a trip? Check special fishing regulations for Cougar Lake — or check the official Oregon fishing regulations.

All Lakes in Lane County

41 lakes · 3 ranked on readings, 38 without enough sampling3 lakes ranked on readings · 38 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
1Cougar LakeLaneNo recent samplesNo recent samples0.5 µg/LNo recent samplesNo recent samples✓ Public
2Blue River LakeLaneNo recent samples10 µg/LNo recent samplesNo recent samplesNo recent samples✓ Public
3Siltcoos LakeLaneNo recent samplesNo recent samples5.4 µg/LNo recent samplesNo recent samples✓ Public
Tenas Lake Along Ne SideLaneNo recent samples10 µg/LNo recent samplesNo recent samplesNo recent samplesNot recorded
Horse LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Betty LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Gold LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Upper Eddeeleo LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Upper Rigdon LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Waldo LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Torrey LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Erma Bell LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Middle Erma Bell LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Wahanna LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Eddeeleo LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Long LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Gander LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
McFarland LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Porky LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mink LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Corner LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lookout Point LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Dorena LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Dexter ReservoirLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Fall Creek LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Cottage Grove LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samples72.2 ft✓ Public
Hills Creek LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Munsel LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samples71 ft✓ Public
Cleawox LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Woahink LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samples75.5 ftNot recorded
Mercer LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samples38 ftNot recorded
Collard LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Clear LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Sutton LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Hult Log Storage ReservoirLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Triangle LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Fern Ridge LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Walterville ReservoirLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Linton LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Scott LakeLaneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

Lake Match

Which lake suits how you actually use one?

Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of lakes that fit, with the water quality behind each one.

Take the quiz →

Other Counties in Oregon

Wallowa County

13 lakes

Clackamas County

10 lakes

Washington County

3 lakes

Marion County

14 lakes

Linn County

22 lakes

Jackson County

20 lakes

Browse every Oregon lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Oregon Department of Environmental Quality. See data sources.