C

Moore Lake

Allegan County, WisconsinEutrophic

Moore Lake is a productive, nutrient-rich eutrophic lake in Allegan County, MI. Water quality is graded C based on 2 sampling years through 2025. Compared to the 11 other monitored lakes in Allegan County, Moore Lake ranks #11 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-11-26. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 6.2 ft. Phosphorus level: 38 µg/L. Trophic State Index: 54.

Metric	Value	Grade
Water Clarity (Secchi Depth)	6.2 ft	D
Phosphorus	38 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	54	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #11 of 12 lakes in Allegan County

Cleaner Lakes Within 30 Miles

Moore Lake holds Grade C. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Allegan County

Eagle Lake North Central Basin

Miner Lake West Central Basin,Allegan Township

More Wisconsin Lake Rankings

Cleanest lakes in Wisconsin

Top 25 by overall water quality score

Best swimming lakes in Wisconsin

Grade A/B + low algae filter

Family fishing lakes in Wisconsin

Panfish-rich, public access

All Wisconsin lakes

Full state directory

Other Grade C Lakes in Wisconsin

Shavehead Lake East Basin; Porter Township

Cass County · Clarity: 7 ft

Leelanau County · Clarity: 9.5 ft

Van Etten Lake North Central Basin; Oscoda Township

Iosco County · Clarity: 5.5 ft

Muskegon County · Clarity: 6.8 ft

Little Lake Twenty

Gladwin County · Clarity: 9 ft

Montmorency County · Clarity: 9 ft

Eutrophic Lakes in Wisconsin

Kimball Lake Van Etten Lake North Central Basin; Oscoda Township Community College Pond Pentwater Lake Northwest Basin; Pentwater Township

EPA Impairment Status

Moore Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MI040500030803-01 · Official waterbody report · Matched by proximity (1.56 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: 2025-11-26

Monitoring stations: 1