Caesar Creek Lake is a 2,830-acre productive, nutrient-rich eutrophic lake in Warren County, Ohio. Water quality is graded C based on 3 sampling years through 2021. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 3 other monitored lakes in Warren County, Caesar Creek Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Ohio DNR, last sampled 2021-10-18. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Murky, only visible to about 3.8 ft. Phosphorus level: 18 µg/L. Chlorophyll-a: 23.5 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | 18 µg/L | A |
| Chlorophyll-a (Algae) | 23.5 µg/L | D |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,830 acres |
| Public Access | Yes |
Where to stay near Caesar Creek Lake
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Fishing Caesar Creek Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.55 m/yr | 2 |
| Phosphorus | ↓ Declining | +6.5 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +26.7 µg/L/yr | 2 |
Recreation & Access
Location
County Ranking
Ranked #1 of 4 lakes in Warren County
Nearby Lakes in Warren County
Explore Caesar Creek Lake across LakeGrade
More Ohio Lake Rankings
Other Grade C Lakes in Ohio
Eutrophic Lakes in Ohio
Compare Caesar Creek Lake With Nearby Lakes
More records, surveys & data sources
Reservoir Info (USACE NID)
Caesar Creek Lake is a man-made reservoir impounded by the Caesar Creek Dam (completed 1976), built primarily for flood risk reduction on the CAESAR CREEK; rockfill-type dam, 180 ft tall and 2,650 ft long.
- Surface area
- 2,830 ac
- Normal storage
- 102,000 ac-ft
- Max storage
- 242,200 ac-ft
- Drainage area
- 237 sq mi
- Hazard class
- High
- Owner
- USACE - Louisville District
All listed purposes: Flood Risk Reduction;Other;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID OH00927 · Operator website
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Caesar Creek Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Waynesville Regional WwtpWaynesville · 2.9 mi away · NPDES OH0020753Recent violation
- Wayne Mobile Inc.Waynesville · 3.4 mi away · NPDES OH0131806Recent violation
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: 2021-10-18
Monitoring stations: 1