Highland Silver Lake
Madison County, Illinois615 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Impaired · Mercury
- 25 ft max depth
Highland Silver Lake in Madison County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 25 ft. Surface area: 615 acres.
Highland Silver Lake is a 615-acre lake in Madison County, Illinois with a maximum depth of 25 feet (10-foot average).
Source: EPA Water Quality Portal sampling records, Illinois EPA. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Highland Silver Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen), pesticides. Check local advisories before you swim.
Whether Highland Silver 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 Silver Lake
These are the measurements Illinois EPA publishes for Highland Silver 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 Silver Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
25 ft
Average depth
10 ft
Surface area
615 acres
Shoreline
18.9 mi
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Stays near Highland Silver Lake
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Fishing Highland Silver Lake
EPA Impairment Status
Highland Silver 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: Fish consumption, Other.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IL_ROZA · Official waterbody report
Nearby Lakes in Madison County
Frequently asked questions about Highland Silver Lake
Where is Highland Silver Lake?
- Highland Silver Lake is a lake in Madison 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 Silver Lake?
- Highland Silver Lake in Madison County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 25 ft. Surface area: 615 acres.
Is Highland Silver Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Highland Silver Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen), pesticides. Check local advisories before you swim.
How deep is Highland Silver Lake?
- Highland Silver Lake has a maximum depth of 25 feet and an average depth of 10 feet. The lake covers 615 acres.
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Where this data comes from
Measurements for Highland Silver 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