Lake Sullivan
Sullivan County, Indiana400 acresView mapDirections
IDEM publishes the water-quality measurements for Lake Sullivan. Here is what has been measured.
- Limited data
Lake Sullivan in Sullivan County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 179.8 µg/L. Chlorophyll-a (algae): 79.3 µg/L. Surface area: 400 acres.
Lake Sullivan is a 400-acre lake in Sullivan County, Indiana.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2022-07-19. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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 Lake Sullivan 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 Lake Sullivan
These are the measurements IDEM publishes for Lake Sullivan, 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 179.8 µg/L. Chlorophyll-a 79.3 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 | 180µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 79.3µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Lake Sullivan
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
400 acres
Shoreline
12.8 mi
No bathymetric survey has been published for Lake Sullivan, so its depth is not documented here.
Stays via Stay22
Stays near Lake Sullivan
Compare lakeside cabins, hotels, and vacation rentals near Lake Sullivan in Sullivan County, Indiana — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Lake Sullivan are listed below.
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Frequently asked questions about Lake Sullivan
Where is Lake Sullivan?
- Lake Sullivan is a lake in Sullivan County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Lake Sullivan?
- Lake Sullivan in Sullivan County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 179.8 µg/L. Chlorophyll-a (algae): 79.3 µg/L. Surface area: 400 acres.
Is Lake Sullivan safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Lake Sullivan 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.