Red Fox Lake
Warren County, Missouri13 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- #12 of 16 in the county
- Limited data
Red Fox Lake in Warren County, Missouri has a water quality grade of C (Fair). Water clarity: 3.3 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 10.3 µg/L. Surface area: 13 acres.
- Clarity
- 3.3 ft
- Typical in September
- 76°F
- Area
- 13 acres
- Type
- Eutrophic
- Phosphorus
- 40 µg/L
- Chlorophyll-a
- 10.3 µg/L
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Watch Red Fox Lake’s letter
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Red Fox Lake is a 13-acre productive, nutrient-rich eutrophic lake in Warren County, Missouri. Water quality is graded C based on 2 sampling years through 2020. 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. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Very murky, less than 3.3 ft of visibility. Phosphorus 40 µg/L. Chlorophyll-a 10.3 µg/L. TSI 57. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 40 µg/L | Fair |
| Chlorophyll-a (Algae) | 10.3 µg/L | Good |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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.
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
| Characteristic | Value |
|---|---|
| Surface Area | 13 acres |
No bathymetric survey has been published for Red Fox Lake, so its depth is not documented here.
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.
County Ranking
Ranked #12 of 16 lakes in Warren County
Nearby Lakes With Higher Grades
Red Fox Lake holds Grade C. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
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. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Red Fox Lake?
- Red Fox Lake in Warren County, Missouri has a water quality grade of C (Fair). 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?
- The C is nutrients and algae, 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 Missouri Lake Rankings
Other Grade C 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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)