New City Lake
Franklin County, Illinois206 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Impaired · Mercury
- 15 ft max depth
New City Lake in Franklin County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 15 ft. Surface area: 206 acres.
New City Lake is a 206-acre lake in Franklin County, Illinois with a maximum depth of 15 feet (8-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. New City Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether New City 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 New City Lake
These are the measurements Illinois EPA publishes for New City 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 New City Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
15 ft
Average depth
8 ft
Surface area
206 acres
Shoreline
6.2 mi
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Stays near New City Lake
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Fishing New City Lake
EPA Impairment Status
New City 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_RNQ · Official waterbody report
Nearby Lakes in Franklin County
Frequently asked questions about New City Lake
Where is New City Lake?
- New City Lake is a lake in Franklin County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of New City Lake?
- New City Lake in Franklin County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 15 ft. Surface area: 206 acres.
Is New City Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. New City Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is New City Lake?
- New City Lake has a maximum depth of 15 feet and an average depth of 8 feet. The lake covers 206 acres.
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Where this data comes from
Measurements for New City 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