Oasis Ranch Lake is a cold, clear oligotrophic lake in Audrain County, Missouri. Water quality is graded A based on 3 sampling years through 2024. Compared to the 3 other monitored lakes in Audrain County, Oasis Ranch Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-18. Grade methodology: LakeGrade methodology.
Watch Oasis Ranch Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 14.1 ft. Phosphorus level: 8 µg/L. Chlorophyll-a: 0.9 µg/L. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.1 ft | B |
| Phosphorus | 8 µg/L | A |
| Chlorophyll-a (Algae) | 0.9 µg/L | A |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Oasis Ranch Lake
Compare lakeside cabins, hotels, and vacation rentals near Oasis Ranch Lake in Audrain County, Missouri — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Oasis Ranch Lake
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 Oasis Ranch Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Oasis Ranch Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Missouri’s top lakes →
Fishing Oasis Ranch Lake
Location
County Ranking
Ranked #2 of 4 lakes in Audrain County
Nearby Lakes in Audrain County
Explore Oasis Ranch Lake across LakeGrade
Species activity outlook by water temperature and season
Where to stay at Missouri's top lakes, each with its grade
Low nutrients, clear water, excellent for swimming
Missouri's cleanest and most-polluted lakes, ranked
More Missouri Lake Rankings
Other Grade A Lakes in Missouri
Warren County · Clarity: 12.6 ft
Jefferson County · Clarity: 12.9 ft
Iron County · Clarity: 13.1 ft
Washington County · Clarity: 11.1 ft
St. Francois County · Clarity: 14.3 ft
St. Francois County · Clarity: 16.3 ft
Oligotrophic Lakes in Missouri
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-18
Monitoring stations: 1