Lafayette Park Lake is a productive, nutrient-rich eutrophic lake in St. Louis city County, Missouri. Water quality is graded D based on 3 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 4 other monitored lakes in St. Louis city County, Lafayette Park Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-18. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.3 ft of visibility. Phosphorus level: 127.5 µg/L. Chlorophyll-a: 18.2 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | F |
| Phosphorus | 127.5 µg/L | F |
| Chlorophyll-a (Algae) | 18.2 µg/L | C |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lafayette Park Lake
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Fishing Lafayette Park Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.011 m/yr | 3 |
| Phosphorus | ↓ Declining | +3.5 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +6.29 µg/L/yr | 3 |
Location
County Ranking
Ranked #3 of 5 lakes in St. Louis city County
Cleaner Lakes Within 30 Miles
Lafayette Park Lake holds Grade D. 2 nearby lakes hold higher grades.
- DO'Fallon Park LakeSt. Louis city County · 4.4 mi · Higher overall water quality score
- DBoathouse LakeSt. Louis city County · 4.6 mi · Higher overall water quality score
Nearby Lakes in St. Louis city County
Explore Lafayette Park Lake across LakeGrade
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
St. Louis County · Clarity: 1.8 ft
St. Louis County · Clarity: 2.5 ft
St. Charles County · Clarity: 2.7 ft
St. Charles County · Clarity: 3.2 ft
Franklin County · Clarity: 2.6 ft
St. Charles County · Clarity: 2.6 ft
Eutrophic Lakes in Missouri
More records, surveys & data sources
Regulated Pollution Sources Nearby
18 EPA-permitted facilities operate within about 5 miles of Lafayette Park Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 8 facilities have a reported Clean Water Act violation in the past three years.
- Sauget-AbrtfSauget · 2.4 mi away · NPDES IL0065145MajorRecent violation
- Kinder Morgan St. Louis Liquid TerminalSt. Louis · 1.5 mi away · NPDES MO0136981Recent violation
- Watco Terminals And Port Services - Cahokia TerminalSauget · 1.8 mi away · NPDES IL0079367Recent violation
- East St Louis Combined Sewer, City OfEast Saint Louis · 2.3 mi away · NPDES IL0033472Recent violation
- Centerstream Stl, LlcSt. Louis · 2.4 mi away · NPDES MO0000345Recent violation
- Veolia Es Technical Solution LlcSauget · 2.6 mi away · NPDES IL0071552Recent 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.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-18
Monitoring stations: 1