What is the water quality grade for Crockery Lake Southwest Basin; Chester Township?

Crockery Lake Southwest Basin; Chester Township in Ottawa County, Wisconsin received a water quality grade of C (Fair). Water clarity: 4 ft visibility. Chlorophyll-a (algae): 10.6 µg/L.

Is Crockery Lake Southwest Basin; Chester Township safe to swim in?

Generally safe for swimming, moderate water quality. Crockery Lake Southwest Basin; Chester Township has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 10.6 µg/L. Always check local health department advisories before swimming.

Crockery Lake Southwest Basin; Chester Township

Ottawa County, WisconsinEutrophic

Crockery Lake Southwest Basin; Chester Township is a productive, nutrient-rich eutrophic lake in Ottawa County, MI. Water quality is graded C based on 2 sampling years through 2023. Compared to the 4 other monitored lakes in Ottawa County, Crockery Lake Southwest Basin; Chester Township ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-09-12. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 4 ft. Chlorophyll-a: 10.6 µg/L. Trophic State Index: 55.

Metric	Value	Grade
Water Clarity (Secchi Depth)	4 ft	D
Phosphorus	No data
Chlorophyll-a (Algae)	10.6 µg/L	C
Trophic State Index (TSI)	55	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #3 of 5 lakes in Ottawa County

Cleaner Lakes Within 30 Miles

Crockery Lake Southwest Basin; Chester Township holds Grade C. One nearby lake has a higher grade.

B
Emerald Lake
Kent County · 15.5 mi · Higher grade (C → B)

See full comparison →

Nearby Lakes in Ottawa County

Crockery Lake Northeast Basin; Chester Township

Ottawa 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 C Lakes in Wisconsin

Shavehead Lake East Basin; Porter Township

Cass County · Clarity: 7 ft

Brooks Lake

Leelanau County · Clarity: 9.5 ft

Van Etten Lake North Central Basin; Oscoda Township

Iosco County · Clarity: 5.5 ft

White Lake

Muskegon County · Clarity: 6.8 ft

Little Lake Twenty

Gladwin County · Clarity: 9 ft

East Twin Lake

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

Crockery Lake Southwest Basin; Chester Township is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

MercuryNutrients (phosphorus, nitrogen)Oxygen depletion (low DO)

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

Source: EPA ATTAINS assessment unit MI040500060601-01 · Official waterbody report · Matched by proximity (0.39 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: 2023-09-12

Monitoring stations: 1