South Mud Lake
Fulton County, Indiana103 acresView mapDirections
IDEM publishes the water-quality measurements for South Mud Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- 27 ft max depth
- Limited data
South Mud Lake in Fulton County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 28.8 µg/L. Chlorophyll-a (algae): 19.9 µg/L. Maximum depth: 26.9 ft. Surface area: 103 acres.
South Mud Lake is a 103-acre lake in Fulton County, Indiana with a maximum depth of 27 feet (11-foot average).
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2022-07-14. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. South Mud Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether South Mud Lake is safe to swim in today is a call for the Indiana Department of Environmental Management and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for South Mud Lake
These are the measurements IDEM publishes for South Mud 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. Phosphorus 28.8 µg/L. Chlorophyll-a 19.9 µg/L.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 28.8µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 19.9µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about South Mud Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
26.9 ft
Average depth
11.2 ft
Surface area
103 acres
Shoreline
2 mi
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Fishing South Mud Lake
EPA Impairment Status
South Mud 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: Recreation.
Source: EPA ATTAINS assessment unit INB06P1086_00 · Official waterbody report
Nearby Lakes in Fulton County
Frequently asked questions about South Mud Lake
Where is South Mud Lake?
- South Mud Lake is a lake in Fulton County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of South Mud Lake?
- South Mud Lake in Fulton County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 28.8 µg/L. Chlorophyll-a (algae): 19.9 µg/L. Maximum depth: 26.9 ft. Surface area: 103 acres.
Is South Mud Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. South Mud 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 South Mud Lake?
- South Mud Lake has a maximum depth of 26.9 feet and an average depth of 11.2 feet. The lake covers 103 acres.
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Where this data comes from
Measurements for South Mud 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