Upper Long Lake
Noble County, Indiana88 acresView mapDirections
IDEM publishes the water-quality measurements for Upper Long Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- 54 ft max depth
- Limited data
Upper Long Lake in Noble County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 157.8 µg/L. Chlorophyll-a (algae): 3.5 µg/L. Maximum depth: 54.1 ft. Surface area: 88 acres.
Upper Long Lake is a 88-acre lake in Noble County, Indiana with a maximum depth of 54 feet (22-foot average).
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2023-07-10. Methodology: how these readings are compared.
What Upper Long Lake is good for
From access and monitoring records, not editorial picks.
- Deep water54.1 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Upper Long Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Upper Long 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 Upper Long Lake
These are the measurements IDEM publishes for Upper Long 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 157.8 µg/L. Chlorophyll-a 3.5 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 | 158µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 3.5µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Upper Long Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
54.1 ft
Average depth
22 ft
Surface area
88 acres
Shoreline
3 mi
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Stays near Upper Long Lake
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Fishing Upper Long Lake
EPA Impairment Status
Upper Long 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 INJ01P1210_00 · Official waterbody report
Nearby Lakes in Noble County
Frequently asked questions about Upper Long Lake
Where is Upper Long Lake?
- Upper Long Lake is a lake in Noble County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Upper Long Lake?
- Upper Long Lake in Noble County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 157.8 µg/L. Chlorophyll-a (algae): 3.5 µg/L. Maximum depth: 54.1 ft. Surface area: 88 acres.
Is Upper Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Upper Long 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 Upper Long Lake?
- Upper Long Lake has a maximum depth of 54.1 feet and an average depth of 22 feet. The lake covers 88 acres.
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Where this data comes from
Measurements for Upper Long 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