Anna State Hospital Reservoir
Union County, Illinois28 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Impaired · Mercury
- 19 ft max depth
Anna State Hospital Reservoir in Union County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 19 ft. Surface area: 28 acres.
Anna State Hospital Reservoir is a 28-acre lake in Union County, Illinois with a maximum depth of 19 feet (9-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. Anna State Hospital Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Anna State Hospital 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 Anna State Hospital Reservoir
These are the measurements Illinois EPA publishes for Anna State Hospital 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 Anna State Hospital Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
19 ft
Average depth
9 ft
Surface area
28 acres
Shoreline
1.3 mi
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Fishing Anna State Hospital Reservoir
EPA Impairment Status
Anna State Hospital 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: Fish consumption.
Source: EPA ATTAINS assessment unit IL_RIC · Official waterbody report
Nearby Lakes in Union County
Frequently asked questions about Anna State Hospital Reservoir
Where is Anna State Hospital Reservoir?
- Anna State Hospital Reservoir is a lake in Union County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Anna State Hospital Reservoir?
- Anna State Hospital Reservoir in Union County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 19 ft. Surface area: 28 acres.
Is Anna State Hospital Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Anna State Hospital Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Anna State Hospital Reservoir?
- Anna State Hospital Reservoir has a maximum depth of 19 feet and an average depth of 9 feet. The lake covers 28 acres.
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Where this data comes from
Measurements for Anna State Hospital 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