Oasis Ranch Lake
Audrain County, MissouriView mapDirections
Missouri DNR publishes the water-quality measurements for Oasis Ranch Lake. Here is what has been measured.
- Oligotrophic
- Limited data
Oasis Ranch Lake in Audrain County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 14.1 ft visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 0.9 µg/L.
Oasis Ranch Lake is a cold, clear oligotrophic lake in Audrain County, Missouri. Compared to the 2 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. Methodology: how these readings are compared.
What Oasis Ranch Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14.1 ft of visibility
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Oasis Ranch Lake is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Oasis Ranch Lake
These are the measurements Missouri DNR publishes for Oasis Ranch Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 14.1 ft. Phosphorus 8 µg/L. Chlorophyll-a 0.9 µg/L. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 14.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 8µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 0.9µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Fishing Oasis Ranch Lake
Nearby Lakes in Audrain County
Frequently asked questions about Oasis Ranch Lake
Where is Oasis Ranch Lake?
- Oasis Ranch Lake is a lake in Audrain County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Oasis Ranch Lake?
- Oasis Ranch Lake in Audrain County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 14.1 ft visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 0.9 µg/L.
Is Oasis Ranch Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Oasis Ranch Lake across LakeQuality
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Other Lakes in Missouri
Oligotrophic Lakes in Missouri
Where this data comes from
18 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC18 samples · 2024
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.