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LakeQuality
B

Lake Audubon

McLean County, WisconsinEutrophic

Lake Audubon is a 19,095-acre productive, nutrient-rich eutrophic lake in McLean County, ND. Water quality is graded B based on 2 sampling years through 2024. Compared to the 2 other monitored lakes in McLean County, Lake Audubon ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-10-08. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Murky, only visible to about 4.7 ft. Chlorophyll-a: 4.7 µg/L. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)4.7 ftD
PhosphorusNo data
Chlorophyll-a (Algae)4.7 µg/LA
Trophic State Index (TSI)50Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Surface Area19.1K acres

Location

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County Ranking

Ranked #2 of 3 lakes in McLean County

Cleaner Lakes Within 30 Miles

Lake Audubon holds Grade B. 5 nearby lakes hold higher grades.

See full comparison →

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Other Grade B Lakes in Wisconsin

Lake Ashtabula

Barnes County · Clarity: 3.4 ft

Lake Ashtabula

Barnes County · Clarity: 6.6 ft

Garlk1481dw Lake

McKenzie County · Clarity: 5.9 ft

Mt Carmel Dam Lake

Cavalier County · Clarity: 7.9 ft

Garlk1412dw Lake

Mercer County · Clarity: 10.4 ft

Gordon Center Lake

Rolette County · Clarity: 8.2 ft

Eutrophic Lakes in Wisconsin

Lake AliceJ. Clark Salyer Pool 357E. A. Patterson LakeLake Irvine

Reservoir Info (USACE NID)

Lake Audubon is a man-made reservoir impounded by the Garrison Dam - Snake Creek Embankment (completed 1952), built primarily for other on the MISSOURI; earth-type dam, 95 ft tall and 12,900 ft long.

Surface area
19,095 ac
Normal storage
346,419 ac-ft
Max storage
396,000 ac-ft
Drainage area
250 sq mi
Hazard class
Significant
Owner
USACE - Omaha District

All listed purposes: Other;Irrigation;Fish and Wildlife Pond;Recreation;Water Supply.

Source: USACE National Inventory of Dams, NID ID ND00145 · Operator website

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-10-08

Monitoring stations: 1