How Clean Is Gratiot Lake?
Gratiot Lake is a clean lake by Michigan standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 17 ft. Phosphorus: 9 µg/L. Trophic State Index: 36.
Cleanliness Snapshot
| Metric | Gratiot Lake | Michigan avg |
|---|---|---|
| Water Clarity (Secchi) | 17 ft | — |
| Phosphorus | 9 µg/L | <30 = clean |
| Trophic State Index | 36 | <50 = clean |
How does Gratiot Lake compare?
Gratiot Lake's readings match or beat the Michigan state average. It ranks #2 of 11 lakes in Keweenaw County on nutrient and algae readings. Multi-year monitoring data shows water quality is stable based on 7 years of records.
Stays via Stay22
Where to stay near Gratiot Lake
Compare cabins, hotels, and vacation rentals near Gratiot Lake in Keweenaw County, Michigan. Live availability and prices for your nights. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Gratiot Lake
Prices for Oct 16–18, 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 Gratiot Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Gratiot Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Gratiot Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.