Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Keweenaw County Lake Quality

Michigan, 51 lakes, measured by EGLE

Keweenaw County has 51 monitored lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the measurements reflect that mix. 11 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Keweenaw County carry favourable nutrient and algae readings for Michigan.

The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Lake Ahmik.

Loading map…

Where to stay near Keweenaw County

Top-rated places to stay near Keweenaw County

Prices for Oct 23–25, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Keweenaw County?

Get lake water-quality updates plus the best cabin & lodging deals near Keweenaw County — straight to your inbox. No spam, unsubscribe anytime.

Quick Answers for Keweenaw County

Cleanest lakes in Keweenaw County →Cleanest lakes in Michigan →Best swimming lakes in Michigan →

Planning a trip? Check special fishing regulations for Lake Ahmik, whether the fish are safe to eat, and the best times to fish — or check the official Michigan fishing regulations.

Fishing in Keweenaw County

Keweenaw County Fishing Guide

Fish species and the cleanest lakes in Keweenaw County

All Lakes in Keweenaw County

51 lakes · 11 ranked on readings, 40 without enough sampling11 lakes ranked on readings · 40 without enough sampling, hidden

Include not-rated lakes (40)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	Lake AhmikKeweenaw	6.6 ft	15.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
2	Gratiot LakeKeweenaw	17 ft	9 µg/L	No recent samples	No recent samples	70 ft	Not recorded
3	Sargent LakeKeweenaw	10.5 ft	13.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
4	Lake RichieKeweenaw	9.2 ft	16.1 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
5	Lake HarveyKeweenaw	10.4 ft	12.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
6	Beaver LakeKeweenaw	8.9 ft	12.9 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
7	Feldtmann LakeKeweenaw	7.5 ft	11.5 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
8	Lake DesorKeweenaw	7.2 ft	11.7 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
9	Lake GeorgeKeweenaw	8 ft	9.9 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
10	Siskiwit LakeKeweenaw	20.5 ft	4.4 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
11	Chickenbone LakeKeweenaw	6.1 ft	28.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Lake GratiotKeweenaw	16.5 ft	No recent samples	No recent samples	No recent samples	70 ft	✓ Public
	Wallace LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake WhittleseyKeweenaw	11.6 ft	23.3 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Hidden LakeKeweenaw	2.5 ft	27.5 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Epidote LakeKeweenaw	7.2 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Angleworm LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake BensonKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Otter LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake LivermoreKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	LeSage LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake MasonKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Intermediate LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Hatchet LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Wood LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Mud LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake HalloranKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake Fanny HooeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	40 ft	✓ Public
	Lake BaileyKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	9 ft	Not recorded
	Lake ManganeseKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
	Lake MedoraKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	✓ Public
	Meadow LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	25 ft	Not recorded
	Schlatter LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	24 ft	Not recorded
	Breakfast LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	34 ft	Not recorded
	Lake AddieKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	22 ft	Not recorded
	Hoar LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	27 ft	Not recorded
	La Belle, LacKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	35 ft	✓ Public
	Deer LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	16 ft	Not recorded
	Thayer LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	5 ft	✓ Public
	Lake ShesheebKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Linklater LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake EvaKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	McDonald LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Amygdaloid LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Patterson LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake OjibwayKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Copper Falls LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake BaileyKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	9 ft	Not recorded
	Mud LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lily LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Perch LakeKeweenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

Lake Match

Which lake suits how you actually use one?

Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of lakes that fit, with the water quality behind each one.

Take the quiz →

Other Counties in Michigan

43 lakes

47 lakes

50 lakes

31 lakes

26 lakes

29 lakes

Browse every Michigan lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Michigan Department of Environment, Great Lakes, and Energy (EGLE). See data sources.