Kruse Lake
St. Charles County, MissouriView mapDirections
Missouri DNR publishes the water-quality measurements for Kruse Lake. Here is what has been measured.
- Limited data
Kruse Lake in St. Charles County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 2.6 ft visibility.
Kruse Lake is a lake in St. Charles County, Missouri.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-14. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Kruse 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 Kruse Lake
These are the measurements Missouri DNR publishes for Kruse Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.6 ft of visibility. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Stays near Kruse Lake
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Fishing Kruse Lake
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Kruse Lake under Clean Water Act (NPDES) discharge permits. 3 facilities have a reported Clean Water Act violation in the past three years.
- Cherokee Lakes Campground WwtpO'Fallon · 1.4 mi away · NPDES MO0117188Recent violation
- Stone Ridge Meadows Subdivision WwtfSt. Paul · 1.4 mi away · NPDES MO0132349Recent violation
- Dcsd Riverdale Subdivision WwtpSt. Paul · 1.6 mi away · NPDES MO0132152Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in St. Charles County
Frequently asked questions about Kruse Lake
Where is Kruse Lake?
- Kruse Lake is a lake in St. Charles County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Kruse Lake?
- Kruse Lake in St. Charles County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 2.6 ft visibility.
Is Kruse Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Kruse Lake across LakeQuality
Planning a trip around Gateway Arch?
Kruse Lake is about 34 miles from Gateway Arch National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Gateway Arch →More lakes in Missouri
Other Lakes in Missouri
Eutrophic Lakes in Missouri
Where this data comes from
5 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
UMC5 samples · 2024
Analytical methods
- Depth, Secchi disk in meters
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.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)