St. Louis County, Missouri · 38.72°N · Water Quality Report Card
Creve Coeur Lake
Creve Coeur Lake in St. Louis County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar.
- Mean depth
- ~19 ft est.
- Trend
- ↓ Declining
Creve Coeur Lake is a lake in St. Louis County, Missouri with an estimated average depth of about 19 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-10-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data |
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~19 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Missouri has not published bathymetry for Creve Coeur Lake.
Where to stay near Creve Coeur Lake
Compare lakeside cabins, hotels, and vacation rentals near Creve Coeur Lake in St. Louis 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.
Top-rated places to stay near Creve Coeur Lake
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Fishing Creve Coeur Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.01 m/yr | 5 |
| Phosphorus | ↓ Declining | +7.75 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +3.24 µg/L/yr | 5 |
Location
Nearby Lakes in St. Louis County
Explore Creve Coeur Lake across LakeGrade
Planning a trip around Gateway Arch?
Creve Coeur Lake is about 17 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 Missouri Lake Rankings
Other Lakes in Missouri
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
3 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR3 samples · 2020
Analytical methods
- Depth, Secchi disk in meters
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-10-05
Monitoring stations: 1