How Clean Is Mary Lake?
Mary Lake has fair water quality — typical of lakes with moderate nutrient enrichment. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 4.9 ft. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 8.8 µg/L. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Mary Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 4.9 ft | — |
| Phosphorus | 20.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 8.8 µg/L | <10 = clean |
| Trophic State Index | 51 | <50 = clean |
How does Mary Lake compare?
Mary Lake's readings match or beat the Minnesota state average. It ranks #72 of 85 lakes in Crow Wing County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 6 years of records.
Stays via Stay22
Where to stay near Mary Lake
Compare cabins, hotels, and vacation rentals near Mary Lake in Crow Wing County, Minnesota. 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 Mary Lake
Prices for Oct 9–11, 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 Mary Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Mary Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Mary Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.