Harrisburg Reservoir
Saline County, Illinois158 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
Harrisburg Reservoir in Saline County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Surface area: 158 acres.
Harrisburg Reservoir is a 158-acre lake in Saline County, Illinois.
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. Harrisburg Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
Whether Harrisburg Reservoir 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 Harrisburg Reservoir
These are the measurements Illinois EPA publishes for Harrisburg Reservoir, 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 Harrisburg Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
158 acres
Shoreline
4.7 mi
No bathymetric survey has been published for Harrisburg Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Harrisburg Reservoir
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Fishing Harrisburg Reservoir
EPA Impairment Status
Harrisburg Reservoir 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.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IL_RAI · Official waterbody report
Nearby Lakes in Saline County
Frequently asked questions about Harrisburg Reservoir
Where is Harrisburg Reservoir?
- Harrisburg Reservoir is a lake in Saline County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Harrisburg Reservoir?
- Harrisburg Reservoir in Saline County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Surface area: 158 acres.
Is Harrisburg Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Harrisburg Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
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Where this data comes from
Measurements for Harrisburg Reservoir 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