Whippoorwill Lake is a 13-acre mesotrophic lake in Warren County, Missouri. Water quality is graded B based on 3 sampling years through 2020. Overall water quality is declining over recent sampling years. Compared to the 15 other monitored lakes in Warren County, Whippoorwill Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-09-20. Grade methodology: LakeGrade methodology.
Watch Whippoorwill Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 5 ft. Phosphorus level: 13.8 µg/L. Chlorophyll-a: 3 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | D |
| Phosphorus | 13.8 µg/L | A |
| Chlorophyll-a (Algae) | 3 µg/L | A |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 13 acres |
Where to stay near Whippoorwill Lake
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Fishing Whippoorwill Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.063 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.72 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.11 µg/L/yr | 5 |
Water Temperature
Whippoorwill Lake averages about 81°F at the surface in summer, usually warmest in Jul (about 84°F) and coldest in Apr (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 70 field readings (2010–2020) via the EPA Water Quality Portal.
Location
County Ranking
Ranked #6 of 16 lakes in Warren County
Cleaner Lakes Within 30 Miles
Whippoorwill Lake holds Grade B. 2 nearby lakes hold higher grades.
- AAlpine LakeWarren County · 2.8 mi · Higher grade (B → A)
- BLake KonstanzWarren County · 2.2 mi · Higher overall water quality score
Nearby Lakes in Warren County
Explore Whippoorwill Lake across LakeGrade
More Missouri Lake Rankings
Other Grade B Lakes in Missouri
Mesotrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Whippoorwill Lake is a man-made reservoir impounded by the Sherman Lake Dam (completed 1964), built primarily for recreation on the TR CHARETTE CREEK; earth-type dam, 33 ft tall.
- Surface area
- 13 ac
- Normal storage
- 135 ac-ft
- Max storage
- 230 ac-ft
- Drainage area
- 200 sq mi
- Hazard class
- High
- Owner
- WILLIAM SHERMAN
Source: USACE National Inventory of Dams, NID ID MO30518 · Operator website · Matched by proximity (0.93 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-20
Monitoring stations: 1