Diamond Lake
Noble County, Indiana109 acresView mapDirections
IDEM publishes the water-quality measurements for Diamond Lake. Here is what has been measured.
- 81 ft max depth
- Limited data
Diamond Lake in Noble County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 60.5 µg/L. Chlorophyll-a (algae): 2.8 µg/L. Maximum depth: 81 ft. Surface area: 109 acres.
Diamond Lake is a 109-acre lake in Noble County, Indiana with a maximum depth of 81 feet (14-foot average).
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2021-06-30. Methodology: how these readings are compared.
What Diamond Lake is good for
From access and monitoring records, not editorial picks.
- Deep water81 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Diamond 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 Diamond Lake
These are the measurements IDEM publishes for Diamond 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 60.5 µg/L. Chlorophyll-a 2.8 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 | 60.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.8µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Diamond Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
81 ft
Average depth
14.1 ft
Surface area
109 acres
Shoreline
1.7 mi
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Frequently asked questions about Diamond Lake
Where is Diamond Lake?
- Diamond 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 Diamond Lake?
- Diamond Lake in Noble County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 60.5 µg/L. Chlorophyll-a (algae): 2.8 µg/L. Maximum depth: 81 ft. Surface area: 109 acres.
Is Diamond Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Diamond Lake?
- Diamond Lake has a maximum depth of 81 feet and an average depth of 14.1 feet. The lake covers 109 acres.
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Where this data comes from
Measurements for Diamond Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.