Jamesport City Lake
Daviess County, WisconsinEutrophic
Jamesport City Lake is a 22-acre productive, nutrient-rich eutrophic lake in Daviess County, MO. Water quality is graded D based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Daviess County, Jamesport City Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-05-23. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
No clarity data. Phosphorus level: 147.7 µg/L. Chlorophyll-a: 15.5 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 147.7 µg/L | F |
| Chlorophyll-a (Algae) | 15.5 µg/L | C |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 22 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Daviess County
Cleaner Lakes Within 30 Miles
Jamesport City Lake holds Grade D. 2 nearby lakes hold higher grades.
- BNorth Bethany City ReservoirHarrison County · 25.2 mi · Two grade letters higher (D → B)
- DIndian Creek LakeLivingston County · 8.9 mi · Higher overall water quality score
Nearby Lakes in Daviess County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
St. Louis city County · Clarity: 2.3 ft
Shelby County · Clarity: 3.2 ft
Macon County · Clarity: 1.8 ft
Harrison County · Clarity: 1.7 ft
Stone County · Clarity: 2.3 ft
Knox County · Clarity: 2.1 ft
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Jamesport City Lake is a man-made reservoir impounded by the Jamesport City Lake Dam (completed 1955), built primarily for water supply on the TR-EAST BRUSHY CREEK; earth-type dam, 35 ft tall and 580 ft long.
- Surface area
- 22 ac
- Normal storage
- 385 ac-ft
- Max storage
- 385 ac-ft
- Drainage area
- 0.03 sq mi
- Hazard class
- Low
- Owner
- CITY OF JAMESPORT
Source: USACE National Inventory of Dams, NID ID MO10559 · Operator website
EPA Impairment Status
Jamesport City Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7104.00 · Official waterbody report
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: 2024-05-23
Monitoring stations: 1