What is the water quality grade for Rodgers Lake?

Rodgers Lake in Benton County, Wisconsin received a water quality grade of F (Very Poor). Water clarity: 2.6 ft visibility. Chlorophyll-a (algae): 44.5 µg/L. Surface area: 23 acres.

Is Rodgers Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Rodgers Lake has an overall water quality grade of F. Algae concentration (chlorophyll-a) is 44.5 µg/L. Always check local health department advisories before swimming.

Rodgers Lake

Benton County, WisconsinEutrophic

Rodgers Lake is a 23-acre productive, nutrient-rich eutrophic lake in Benton County, IA. Water quality is graded F based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Benton County, Rodgers Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-10-23. 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 2.6 ft of visibility. Chlorophyll-a: 44.5 µg/L. Trophic State Index: 66.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.6 ft	F
Phosphorus	No data
Chlorophyll-a (Algae)	44.5 µg/L	F
Trophic State Index (TSI)	66	Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

Characteristic	Value
Surface Area	23 acres

Location

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County Ranking

Ranked #2 of 2 lakes in Benton County

Cleaner Lakes Within 30 Miles

Rodgers Lake holds Grade F. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Benton County

More Wisconsin Lake Rankings

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Top 25 by overall water quality score

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Grade A/B + low algae filter

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Panfish-rich, public access

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Other Grade F Lakes in Wisconsin

Big Creek Lake

Polk County · Clarity: 2.6 ft

Arrowhead Lake

Pottawattamie County · Clarity: 1.8 ft

White Oak Lake

Mahaska County · Clarity: 1.4 ft

Crystal Lake Max Depth

Hancock County · Clarity: 1.6 ft

Briggs Woods Lake

Hamilton County · Clarity: 1.5 ft

Grays Lake

Polk County · Clarity: 1.6 ft

Eutrophic Lakes in Wisconsin

Big Creek Lake Storm Lake Max Depth Lost Island Lake Nodaway Lake

Reservoir Info (USACE NID)

Rodgers Lake is a man-made reservoir impounded by the Rodgers Park Lake Dam (completed 1977), built primarily for recreation on the TR-CEDAR RIVER; earth-type dam, 30 ft tall and 700 ft long.

Surface area: 23 ac
Normal storage: 128 ac-ft
Max storage: 571 ac-ft
Drainage area: 3.21 sq mi
Hazard class: Significant
Owner: Benton County Conservation Board

Source: USACE National Inventory of Dams, NID ID IA01925 · Operator website · Matched by proximity (0.1 km)

EPA Impairment Status

Rodgers Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growth

Source: EPA ATTAINS assessment unit IA 02-CED-526 · Official waterbody report · Matched by proximity (0.41 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: 2024-10-23

Monitoring stations: 1