What is the water quality grade for Jamesport Community Lake?

Jamesport Community Lake in Daviess County, Wisconsin received a water quality grade of F (Very Poor). Water clarity: 0.9 ft visibility. Phosphorus: 160.3 µg/L. Chlorophyll-a (algae): 111.4 µg/L. Surface area: 30 acres.

Is Jamesport Community Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Jamesport Community Lake has an overall water quality grade of F. Algae concentration (chlorophyll-a) is 111.4 µg/L. Always check local health department advisories before swimming.

Jamesport Community Lake

Daviess County, WisconsinHypereutrophic

Jamesport Community Lake is a 30-acre highly nutrient-loaded hypereutrophic lake in Daviess County, MO. Water quality is graded F based on 3 sampling years through 2024. Compared to the 1 other monitored lakes in Daviess County, Jamesport Community Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-06-10. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 0.9 ft of visibility. Phosphorus level: 160.3 µg/L. Chlorophyll-a: 111.4 µg/L. Trophic State Index: 78.

Metric	Value	Grade
Water Clarity (Secchi Depth)	0.9 ft	F
Phosphorus	160.3 µg/L	F
Chlorophyll-a (Algae)	111.4 µg/L	F
Trophic State Index (TSI)	78	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Lake Details

Characteristic	Value
Surface Area	30 acres

Location

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County Ranking

Ranked #2 of 2 lakes in Daviess County

Cleaner Lakes Within 30 Miles

Jamesport Community Lake holds Grade F. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Daviess County

North Bethany City Reservoir

Harrison County

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Mercer County

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Reservoir Info (USACE NID)

Jamesport Community Lake is a man-made reservoir impounded by the Jamesport Lake Dam (completed 1956), built primarily for recreation on the TR-EAST BRUSHY CREEK; earth-type dam, 21 ft tall.

Surface area: 30 ac
Normal storage: 160 ac-ft
Max storage: 337 ac-ft
Drainage area: 275 sq mi
Hazard class: Low
Owner: MO DEPT OF CONSERVATION

Source: USACE National Inventory of Dams, NID ID MO10663 · Operator website · Matched by proximity (0.05 km)

EPA Impairment Status

Jamesport Community Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growth

Source: EPA ATTAINS assessment unit MO_7105.00 · 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: 2024-06-10

Monitoring stations: 1