Big Long Lake
LaGrange County, Indiana392 acresView mapDirections
IDEM publishes the water-quality measurements for Big Long Lake. Here is what has been measured.
- Mesotrophic
- 82 ft max depth
Big Long Lake in LaGrange County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 4 µg/L. Maximum depth: 82 ft. Surface area: 392 acres.
Big Long Lake is a 392-acre mesotrophic lake in LaGrange County, Indiana with a maximum depth of 82 feet.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2024-09-10. Methodology: how these readings are compared.
What Big Long Lake is good for
From access and monitoring records, not editorial picks.
- Deep water82 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Big 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 Big Long Lake
These are the measurements IDEM publishes for Big 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 22 µg/L. Chlorophyll-a 4 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 | 22µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 4µg/L | Good GoodFairPoor |
Moderate nutrients, good water quality
Ask about Big Long Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
82 ft
Surface area
392 acres
Shoreline
7 mi
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Fishing Big Long Lake
Nearby Lakes in LaGrange County
Frequently asked questions about Big Long Lake
Where is Big Long Lake?
- Big Long Lake is a lake in LaGrange County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Big Long Lake?
- Big Long Lake in LaGrange County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 4 µg/L. Maximum depth: 82 ft. Surface area: 392 acres.
Is Big Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Big Long Lake?
- Big Long Lake has a maximum depth of 82 feet. The lake covers 392 acres.
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Where this data comes from
Measurements for Big Long Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.