What is the water quality grade for Long Lake?

Long Lake in Gogebic County, Wisconsin received a water quality grade of B (Good). Water clarity: 12 ft visibility. Chlorophyll-a (algae): 5.5 µg/L.

Is Long Lake safe to swim in?

Good for swimming, clear water with low algae levels. Long Lake has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 5.5 µg/L. Always check local health department advisories before swimming.

What fish are in Long Lake?

Fish species found in Long Lake include Blackchin shiner, Blacknose shiner, Blackside darter, Blackstripe topminnow, Bluegill, Bluntnose minnow, Brook silverside, Brown bullhead, Central mudminnow, Central stoneroller, Creek chub, Golden redhorse, Golden shiner, Grass pickerel, Green sunfish, Hornyhead chub, Iowa darter, Johnny darter, Lake herring, Lake whitefish, Largemouth bass, Longnose gar, Mimic shiner, Northern logperch, Northern longear sunfish, Northern pearl dace, Northern pike, Pumpkinseed, Rainbow trout, Rock bass, Sand shiner, Smallmouth bass, Spotted gar, Striped shiner, Walleye, Warmouth, Western banded killifish, White sucker, Yellow bullhead, Yellow perch. Long Lake is located in Gogebic County, Wisconsin.

Long Lake

Gogebic County, WisconsinMesotrophic

Long Lake is a mesotrophic lake in Gogebic County, MI. Water quality is graded B based on 2 sampling years through 2023. The lake supports 40 documented fish species including Blackchin shiner, Blacknose shiner, and Blackside darter. Compared to the 39 other monitored lakes in Gogebic County, Long Lake ranks #16 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-08-28. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 12 ft. Chlorophyll-a: 5.5 µg/L. Trophic State Index: 44.

Metric	Value	Grade
Water Clarity (Secchi Depth)	12 ft	B
Phosphorus	No data
Chlorophyll-a (Algae)	5.5 µg/L	B
Trophic State Index (TSI)	44	Mesotrophic

Moderate nutrients, good water quality

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Long Lake (14-day solunar calendar)

→ Is it safe to eat fish from Long Lake? (mercury & PFAS guide)

→ Long Lake fishing regulations (limits, seasons, special rules)

Location

Loading map…

County Ranking

Ranked #16 of 40 lakes in Gogebic County

Nearby Lakes in Gogebic County

Moon Lake Central Basin; Watersmeet Township

Thousand Island Lake South Basin;Watersmeet Township Sec11

Gogebic County

Fishhawk Lake East Basin; Watersmeet Township

Gogebic County

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

Portage Lake

Livingston County · Clarity: 13 ft

Bear Lake East Basin; Pleasanton Township

Manistee County · Clarity: 11 ft

Bass Lake

Lake County · Clarity: 14 ft

Long Lake

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

EPA Impairment Status

Long 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 MI040201020101-14 · Official waterbody report · Matched by proximity (2.94 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: 2023-08-28

Monitoring stations: 1