Dewart Lake is a mesotrophic lake in Kosciusko County, Indiana. Water quality is graded B based on 1 sampling years through 2021. The lake supports 4 documented fish species including Bluegill, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 18 other monitored lakes in Kosciusko County, Dewart Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Indiana DNR, last sampled 2021-08-11. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10.2 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.2 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Dewart Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Dewart Lake
Recreation & Access
Location
County Ranking
Ranked #2 of 19 lakes in Kosciusko County
Nearby Lakes in Kosciusko County
Explore Dewart Lake across LakeGrade
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Fish species and best lakes in Kosciusko County
Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Other Grade B Lakes in Indiana
Mesotrophic Lakes in Indiana
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Dewart Lake under Clean Water Act (NPDES) discharge permits.
- Maple Leaf Farms IncMilford · 1.7 mi away · NPDES IN0000876
- Bison Trailer LlcMilford · 4.3 mi away · NPDES INRM01779
- North Park Phase 5Milford · 4.5 mi away · NPDES INR10L977
- Additional Compacted Aggregate Service Areas At Bison CoachMilford · 4.7 mi away · NPDES INR10H683
- Bison Horse Trailers LlcMilford · 4.7 mi away · NPDES INRM01733
- Pigtek A Division Of Ctb IncorporatedMilford · 4.7 mi away · NPDES INRM00729
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2021-08-11
Monitoring stations: 1