How Clean Is Roy Lake?
Roy 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): 6 ft. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 13.6 µg/L. Trophic State Index: 52.
Cleanliness Snapshot
| Metric | Roy Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 6 ft | — |
| Phosphorus | 24 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 13.6 µg/L | <10 = clean |
| Trophic State Index | 52 | <50 = clean |
How does Roy Lake compare?
Roy Lake's readings match or beat the Minnesota state average. It ranks #7 of 12 lakes in Mahnomen County on nutrient and algae readings. Multi-year monitoring data shows water quality is improving based on 6 years of records.
Stays via Stay22
Where to stay near Roy Lake
Compare cabins, hotels, and vacation rentals near Roy Lake in Mahnomen 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 Roy Lake
Prices for Nov 6–8, 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 Roy Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Roy Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Roy Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.