Troost Lake
Jackson County, MissouriView mapDirections
Missouri DNR publishes the water-quality measurements for Troost Lake. Here is what has been measured.
- Hypereutrophic
Troost Lake in Jackson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Phosphorus: 120.5 µg/L. Chlorophyll-a (algae): 75.3 µg/L.
Troost Lake is a highly nutrient-loaded hypereutrophic lake in Jackson County, Missouri. Overall water quality is declining over recent sampling years. Compared to the 22 other monitored lakes in Jackson County, Troost Lake ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-14. Methodology: how these readings are compared.
Swimming conditions
Readings onlyAlgae risk
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 Troost 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 Troost Lake
These are the measurements Missouri DNR publishes for Troost Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 120.5 µg/L. Chlorophyll-a 75.3 µg/L. TSI 73.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 121µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 75.3µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 73 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Troost Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Troost Lake typically sits around 77°F at the surface in September. Summer average is about 82°F. Usually warmest in Jul (about 84°F) and coldest in May (about 72°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (72°F) to its warmest (84°F).
Typical surface water temperature by month, from 30 field readings (2013–2024) via the EPA Water Quality Portal. See the full Troost Lake water temperature breakdown →
Stays via Stay22
Stays near Troost Lake
Compare lakeside cabins, hotels, and vacation rentals near Troost Lake in Jackson 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Troost Lake are listed below.
Top-rated places to stay near Troost Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Missouri’s top lakes →
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Fishing Troost Lake
Water Quality Trend: Worsening
Based on 4 years of monitoring (2021–2024).
Phosphorus
Worsening+15.99 µg/L/yr4 years
Chlorophyll-a
Worsening+5.33 µg/L/yr4 years
Nearby Lakes in Jackson County
Frequently asked questions about Troost Lake
Where is Troost Lake?
- Troost Lake is a lake in Jackson County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Troost Lake?
- Troost Lake in Jackson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Phosphorus: 120.5 µg/L. Chlorophyll-a (algae): 75.3 µg/L.
Is Troost Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Troost Lake?
- Troost Lake typically sits around 77°F at the surface in September, from 30 EPA Water Quality Portal field readings (2013–2024). That is a typical value for the month, not a live reading.
Explore Troost Lake across LakeQuality
More lakes in Missouri
Other Lakes in Missouri
Hypereutrophic Lakes in Missouri
Where this data comes from
43 measurements from 1 monitoring station, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC43 samples · 2022–2024
Analytical methods
- 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.