Chaumiere Park Lake is a highly nutrient-loaded hypereutrophic lake in Clay County, Missouri. Water quality is graded F based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 8 other monitored lakes in Clay County, Chaumiere Park Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Based on E. coli testing, Chaumiere Park Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 14.3% of 7 samples across 3 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Missouri’s current beach and health-department advisories before swimming.
Water Quality Grade: F, Very Poor
No clarity data. Phosphorus level: 159.5 µg/L. Chlorophyll-a: 76.3 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 159.5 µg/L | F |
| Chlorophyll-a (Algae) | 76.3 µg/L | F |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Chaumiere Park Lake
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Top-rated places to stay near Chaumiere Park Lake
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Fishing Chaumiere Park Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.08 m/yr | 2 |
| Phosphorus | ↓ Declining | +34.95 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -1.54 µg/L/yr | 4 |
Water Temperature
Chaumiere Park Lake averages about 78°F at the surface in summer, usually warmest in Jul (about 82°F) and coldest in Oct (about 64°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 41 field readings (2010–2022) via the EPA Water Quality Portal. See the full Chaumiere Park Lake water temperature breakdown →
Location
County Ranking
Ranked #8 of 9 lakes in Clay County
Cleaner Lakes Within 30 Miles
Chaumiere Park Lake holds Grade F. 2 nearby lakes hold higher grades.
- CWaukomis LakePlatte County · 6.4 mi · Two grade letters higher (F → C)
- CBlue Valley LakeJackson County · 6.5 mi · Two grade letters higher (F → C)
Nearby Lakes in Clay County
Explore Chaumiere Park Lake across LakeGrade
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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More records, surveys & data sources
EPA Impairment Status
Chaumiere Park Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7634.00 · Official waterbody report · Matched by proximity (0.06 km)
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Chaumiere Park Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Kc Blue River WwtpKansas City · 3.6 mi away · NPDES MO0024911MajorRecent violation
- Brenntag Mid-South Inc.Kansas City · 2.3 mi away · NPDES MO0121771Recent 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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-05
Monitoring stations: 1