Red Fox Lake
Warren County, Missouri13 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Red Fox Lake. Here is what has been measured.
- Eutrophic
- Limited data
Red Fox Lake in Warren County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.3 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 10.3 µg/L. Surface area: 13 acres.
Red Fox Lake is a 13-acre productive, nutrient-rich eutrophic lake in Warren County, Missouri. Compared to the 15 other monitored lakes in Warren County, Red Fox Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-09-16. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Red Fox Lake is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Red Fox Lake
These are the measurements Missouri DNR publishes for Red Fox Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.3 ft of visibility. Phosphorus 40 µg/L. Chlorophyll-a 10.3 µg/L. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 40µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 10.3µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Red Fox Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Red Fox Lake typically sits around 76°F at the surface in September. Summer average is about 81°F. Usually warmest in Jul (about 84°F) and coldest in Apr (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (84°F).
Typical surface water temperature by month, from 110 field readings (2010–2020) via the EPA Water Quality Portal. See the full Red Fox Lake water temperature breakdown →
Lake Details
Surface area
13 acres
No bathymetric survey has been published for Red Fox Lake, so its depth is not documented here.
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Fishing Red Fox Lake
Reservoir Info (USACE NID)
Red Fox 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 (0.72 km)
Regulated Pollution Sources Nearby
8 EPA-permitted facilities operate within about 5 miles of Red Fox Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 6 facilities have a reported Clean Water Act violation in the past three years.
- Pwsd #2, Wright City South WwtfWright City · 3.5 mi away · NPDES MO0140503MajorRecent violation
- Stewart Mhp WwtfWright City · 1.6 mi away · NPDES MO0119792Recent violation
- Maple Ridge Mhp WwtpWright City · 2.1 mi away · NPDES MO0105007Recent violation
- Wright City South WwtfWright City · 3.3 mi away · NPDES MO0023191Recent violation
- Pleasant Oak Mhp WwtpWright City · 4.1 mi away · NPDES MO0110680Recent violation
- Foristell Interim WwtpForistell · 4.7 mi away · NPDES MO0116114Recent 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.
Nearby Lakes in Warren County
Frequently asked questions about Red Fox Lake
Where is Red Fox Lake?
- Red Fox Lake is a lake in Warren County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Red Fox Lake?
- Red Fox Lake in Warren County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.3 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 10.3 µg/L. Surface area: 13 acres.
Is Red Fox Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Red Fox Lake?
- Red Fox Lake typically sits around 76°F at the surface in September, from 110 EPA Water Quality Portal field readings (2010–2020). That is a typical value for the month, not a live reading.
Explore Red Fox Lake across LakeQuality
More lakes in Missouri
Other Lakes in Missouri
Eutrophic Lakes in Missouri
Where this data comes from
17 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC17 samples · 2020
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)