B

Ingerson Lake

Allegan County, WisconsinMesotrophic

Ingerson Lake is a mesotrophic lake in Allegan County, MI. Water quality is graded B based on 3 sampling years through 2025. Compared to the 11 other monitored lakes in Allegan County, Ingerson Lake ranks #6 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-11-25. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 9 ft. Phosphorus level: 41.5 µg/L. Chlorophyll-a: 1.4 µg/L. Trophic State Index: 46.

Metric	Value	Grade
Water Clarity (Secchi Depth)	9 ft	C
Phosphorus	41.5 µg/L	C
Chlorophyll-a (Algae)	1.4 µg/L	A
Trophic State Index (TSI)	46	Mesotrophic

Moderate nutrients, good water quality

Location

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County Ranking

Ranked #6 of 12 lakes in Allegan County

Cleaner Lakes Within 30 Miles

Ingerson Lake holds Grade B. 2 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 B Lakes in Wisconsin

Middle Lake; Elba Township; Section 13

Lapeer County · Clarity: 9.5 ft

Livingston County · Clarity: 13 ft

Bear Lake East Basin; Pleasanton Township

Manistee County · Clarity: 11 ft

Lake County · Clarity: 14 ft

Cass County · Clarity: 10.5 ft

Byram Lake West Central Basin; Fenton Township

Genesee County · Clarity: 10 ft

Mesotrophic Lakes in Wisconsin

Middle Lake; Elba Township; Section 13 Portage Lake Shavehead Lake East Basin; Porter Township Chippewa Lake Northeast Basin; Chippewa Township

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-11-25

Monitoring stations: 1