Caesar Creek Lake
Warren County, WisconsinEutrophic
Caesar Creek Lake is a 2,830-acre productive, nutrient-rich eutrophic lake in Warren County, OH. Water quality is graded D based on 3 sampling years through 2021. Compared to the 3 other monitored lakes in Warren County, Caesar Creek Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-10-18. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 3.2 ft of visibility. Phosphorus level: 26 µg/L. Chlorophyll-a: 20.1 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.2 ft | F |
| Phosphorus | 26 µg/L | B |
| Chlorophyll-a (Algae) | 20.1 µg/L | D |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2.8K acres |
Location
County Ranking
Ranked #3 of 4 lakes in Warren County
Cleaner Lakes Within 30 Miles
Caesar Creek Lake holds Grade D. 2 nearby lakes hold higher grades.
- CCaesar Creek LakeWarren County · 1 mi · Higher grade (D → C)
- CCaesar Creek LakeWarren County · 2.3 mi · Higher grade (D → C)
Nearby Lakes in Warren County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
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
EPA Impairment Status
Caesar Creek Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit OH050902020406 · Official waterbody report · Matched by proximity (2.25 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-10-18
Monitoring stations: 1