Highland Lake
Lake County, Illinois101 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 30 ft max depth
Highland Lake in Lake County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 30 ft. Surface area: 101 acres.
Highland Lake is a 101-acre lake in Lake County, Illinois with a maximum depth of 30 feet (9-foot average).
Source: EPA Water Quality Portal sampling records, Illinois EPA. Methodology: how these readings are compared.
What Highland Lake is good for
From access and monitoring records, not editorial picks.
- Deep water30 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Highland Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Highland Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Highland Lake
These are the measurements Illinois EPA publishes for Highland 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 Highland Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
30 ft
Average depth
9 ft
Surface area
101 acres
Shoreline
1.5 mi
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Stays near Highland Lake
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Fishing Highland Lake
EPA Impairment Status
Highland 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: Other.
Source: EPA ATTAINS assessment unit IL_RTZP · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Highland Lake
Where is Highland Lake?
- Highland Lake is a lake in Lake County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Highland Lake?
- Highland Lake in Lake County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 30 ft. Surface area: 101 acres.
Is Highland Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Highland 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 Highland Lake?
- Highland Lake has a maximum depth of 30 feet and an average depth of 9 feet. The lake covers 101 acres.
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Where this data comes from
Measurements for Highland 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