Innsbrook Lake
Warren County, MissouriView mapDirections
Missouri DNR publishes the water-quality measurements for Innsbrook Lake. Here is what has been measured.
- Mesotrophic
Innsbrook Lake in Warren County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 5.2 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 5 µg/L.
Innsbrook Lake is a mesotrophic lake in Warren County, Missouri. Water clarity is improving over recent sampling years. Compared to the 15 other monitored lakes in Warren County, Innsbrook Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-26. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
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 Innsbrook 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 Innsbrook Lake
These are the measurements Missouri DNR publishes for Innsbrook Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.2 ft. Phosphorus 17 µg/L. Chlorophyll-a 5 µg/L. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 17µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 5µg/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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Innsbrook Lake
Water Quality Trend: Stable
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Stable-0.18 µg/L/yr5 years
Chlorophyll-a
Worsening+0.07 µg/L/yr5 years
Nearby Lakes in Warren County
Frequently asked questions about Innsbrook Lake
Where is Innsbrook Lake?
- Innsbrook Lake is a lake in Warren County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Innsbrook Lake?
- Innsbrook Lake in Warren County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 5.2 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 5 µg/L.
Is Innsbrook Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Innsbrook Lake across LakeQuality
More lakes in Missouri
Other Lakes in Missouri
Mesotrophic Lakes in Missouri
Where this data comes from
76 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC76 samples · 2020–2024
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.