How Clean Is Mill Lake?
Mill 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): 11 ft. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 9 µg/L. Trophic State Index: 48.
Cleanliness Snapshot
| Metric | Mill Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 11 ft | — |
| Phosphorus | 23 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 9 µg/L | <10 = clean |
| Trophic State Index | 48 | <50 = clean |
How does Mill Lake compare?
Mill Lake's readings match or beat the Minnesota state average. It ranks #27 of 37 lakes in Douglas County by water quality score. Multi-year monitoring data shows water quality is declining based on 3 years of records.
Stays via Stay22
Where to stay near Mill Lake
Compare cabins, hotels, and vacation rentals near Mill Lake in Douglas 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 Mill Lake
Prices for Sep 25–27, 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 Mill Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Mill Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Mill Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.