What is the water quality grade for Stony Lake West Basin North?

Stony Lake West Basin North in Oceana County, Wisconsin received a water quality grade of C (Fair). Water clarity: 6.5 ft visibility. Chlorophyll-a (algae): 6.3 µg/L.

Is Stony Lake West Basin North safe to swim in?

Generally safe for swimming, moderate water quality. Stony Lake West Basin North has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 6.3 µg/L. Always check local health department advisories before swimming.

Stony Lake West Basin North

Oceana County, WisconsinMesotrophic

Stony Lake West Basin North is a mesotrophic lake in Oceana County, MI. Water quality is graded C based on 2 sampling years through 2023. Compared to the 4 other monitored lakes in Oceana County, Stony Lake West Basin North ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-09-16. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 6.5 ft. Chlorophyll-a: 6.3 µg/L. Trophic State Index: 49.

Metric	Value	Grade
Water Clarity (Secchi Depth)	6.5 ft	D
Phosphorus	No data
Chlorophyll-a (Algae)	6.3 µg/L	B
Trophic State Index (TSI)	49	Mesotrophic

Moderate nutrients, good water quality

Location

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County Ranking

Ranked #3 of 5 lakes in Oceana County

Cleaner Lakes Within 30 Miles

Stony Lake West Basin North holds Grade C. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Oceana County

Mi27m Lake

Oceana County

Pentwater Lake Northwest Basin; Pentwater Township

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

All Wisconsin lakes

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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

Mesotrophic Lakes in Wisconsin

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

EPA Impairment Status

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

Causes of impairment

Oxygen depletion (low DO)

Source: EPA ATTAINS assessment unit MI040601011006-01 · Official waterbody report · Matched by proximity (0.3 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: 2023-09-16

Monitoring stations: 1