Mercer Lake
Lane County, Oregon350 acresView mapDirections
No nutrient or algae sampling on record from Oregon DEQ for this lake.
- Impaired · Algal growth
- 38 ft max depth
Mercer Lake in Lane County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Maximum depth: 38 ft. Surface area: 350 acres.
Mercer Lake is a 350-acre lake in Lane County, Oregon with a maximum depth of 38 feet (23-foot average).
Source: EPA Water Quality Portal sampling records, Oregon DEQ. Methodology: how these readings are compared.
What Mercer Lake is good for
From access and monitoring records, not editorial picks.
- Deep water38 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Mercer Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Whether Mercer Lake is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mercer Lake
These are the measurements Oregon DEQ publishes for Mercer Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Mercer Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
38 ft
Average depth
23 ft
Surface area
350 acres
Shoreline
9 mi
Stays via Stay22
Stays near Mercer Lake
Compare lakeside cabins, hotels, and vacation rentals near Mercer Lake in Lane County, Oregon — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Mercer Lake
Prices for Oct 16–18, 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 whole trip? See where to stay at Oregon’s top lakes →
Follow Mercer Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Mercer Lake
EPA Impairment Status
Mercer Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Drinking water, Fish consumption, Recreation, Other.
Source: EPA ATTAINS assessment unit OR_LK_1710020507_02_100167 · Official waterbody report
Nearby Lakes in Lane County
Frequently asked questions about Mercer Lake
Where is Mercer Lake?
- Mercer Lake is a lake in Lane County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Mercer Lake?
- Mercer Lake in Lane County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Maximum depth: 38 ft. Surface area: 350 acres.
Is Mercer Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mercer Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
How deep is Mercer Lake?
- Mercer Lake has a maximum depth of 38 feet and an average depth of 23 feet. The lake covers 350 acres.
Explore Mercer Lake across LakeQuality
More lakes in Oregon
Other Lakes in Oregon
Where this data comes from
Measurements for Mercer Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database