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LakeQuality
D
St. Louis city County, Missouri

Lafayette Park Lake

Grade DPoor · 2.3 ft clarity

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Eutrophic

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

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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.

MetricValueGrade
Water Clarity (Secchi Depth)2.3 ftF
Phosphorus127.5 µg/LF
Chlorophyll-a (Algae)18.2 µg/LC
Trophic State Index (TSI)66Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Lafayette Park Lake

Compare lakeside cabins, hotels, and vacation rentals near Lafayette Park Lake in St. Louis city 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.

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Fishing Lafayette Park Lake

Water Quality Trend: Declining

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable-0.011 m/yr3
Phosphorus Declining+3.5 µg/L/yr3
Chlorophyll-a Declining+6.29 µg/L/yr3

Location

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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.

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Nearby Lakes in St. Louis city County

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-Abrtf
    Sauget · 2.4 mi away · NPDES IL0065145
    MajorRecent violation
  • Kinder Morgan St. Louis Liquid Terminal
    St. Louis · 1.5 mi away · NPDES MO0136981
    Recent violation
  • Watco Terminals And Port Services - Cahokia Terminal
    Sauget · 1.8 mi away · NPDES IL0079367
    Recent violation
  • East St Louis Combined Sewer, City Of
    East Saint Louis · 2.3 mi away · NPDES IL0033472
    Recent violation
  • Centerstream Stl, Llc
    St. Louis · 2.4 mi away · NPDES MO0000345
    Recent violation
  • Veolia Es Technical Solution Llc
    Sauget · 2.6 mi away · NPDES IL0071552
    Recent 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

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