Troost Lake
Jackson County, MissouriView mapDirections
Nutrients and algae run well above the regional average.
- Hypereutrophic
- #15 of 23 in the county
Troost Lake in Jackson County, Missouri has a water quality grade of F (Algae-prone). Phosphorus: 120.5 µg/L. Chlorophyll-a (algae): 75.3 µg/L.
- Typical in September
- 77°F
- Type
- Hypereutrophic
- Phosphorus
- 120.5 µg/L
- Chlorophyll-a
- 75.3 µg/L
- Trend
- ↓ Declining
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 grade measures nutrients and algae, not lodging — cabins and rentals around Troost Lake are listed below.
Top-rated places to stay near Troost Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
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Troost Lake is a highly nutrient-loaded hypereutrophic lake in Jackson County, Missouri. Water quality is graded F based on 2 sampling years through 2024. 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. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyAlgae risk
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
No clarity data. Phosphorus 120.5 µg/L. Chlorophyll-a 75.3 µg/L. TSI 73. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 120.5 µg/L | Poor |
| Chlorophyll-a (Algae) | 75.3 µg/L | Poor |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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.
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 →
Fishing Troost Lake
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +15.99 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +5.33 µg/L/yr | 4 |
County Ranking
Ranked #15 of 23 lakes in Jackson County
Nearby Lakes in Jackson County
Frequently asked questions about Troost Lake
Where is Troost Lake?
- Troost Lake is a lake in Jackson County, Missouri. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Troost Lake?
- Troost Lake in Jackson County, Missouri has a water quality grade of F (Algae-prone). Phosphorus: 120.5 µg/L. Chlorophyll-a (algae): 75.3 µg/L.
Is Troost Lake safe to swim in?
- The F is nutrients and algae, 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
Species activity outlook by water temperature and season
Where to stay at Missouri's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
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Other Grade F 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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.