Lost Lake
Dodge County, Wisconsin247 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 8 ft max depth
Lost Lake in Dodge County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 8 ft. Surface area: 247 acres.
Lost Lake is a 247-acre lake in Dodge County, Wisconsin with a maximum depth of 8 feet (5-foot average).
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Lost Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Lost Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lost Lake
These are the measurements Wisconsin DNR publishes for Lost 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 Lost Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
8 ft
Average depth
5 ft
Surface area
247 acres
Shoreline
2.9 mi
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Stays near Lost Lake
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Fishing Lost Lake
EPA Impairment Status
Lost Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit WI10001265 · Official waterbody report
Nearby Lakes in Dodge County
Frequently asked questions about Lost Lake
Where is Lost Lake?
- Lost Lake is a lake in Dodge County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lost Lake?
- Lost Lake in Dodge County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 8 ft. Surface area: 247 acres.
Is Lost Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lost Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Lost Lake?
- Lost Lake has a maximum depth of 8 feet and an average depth of 5 feet. The lake covers 247 acres.
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Where this data comes from
Measurements for Lost 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