Fawn Lake
Franklin County, Missouri25 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Fawn Lake. Here is what has been measured.
- Eutrophic
- 38 ft max depth
- Limited data
Fawn Lake in Franklin County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.6 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 10.8 µg/L. Surface area: 25 acres.
Fawn Lake is a 25-acre productive, nutrient-rich eutrophic lake in Franklin County, Missouri with an estimated average depth of about 38 feet. Compared to the 2 other monitored lakes in Franklin County, Fawn Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-20. 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 Fawn 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 Fawn Lake
These are the measurements Missouri DNR publishes for Fawn Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.6 ft. Phosphorus 30 µg/L. Chlorophyll-a 10.8 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 30µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 10.8µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Fawn Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~38 ft est.
Surface area
25 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Fawn Lake.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
633 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Fishing Fawn Lake
Reservoir Info (USACE NID)
Fawn Lake is a man-made reservoir impounded by the Fawn Lake Dam (completed 1969), built primarily for recreation on the TR TO ST JOHNS CR; earth-type dam, 43 ft tall and 650 ft long.
- Surface area
- 25 ac
- Normal storage
- 207 ac-ft
- Max storage
- 400 ac-ft
- Drainage area
- 0.91 sq mi
- Hazard class
- Significant
- Owner
- FAWN LAKE ESTATES
Source: USACE National Inventory of Dams, NID ID MO31253 · Operator website
Regulated Pollution Sources Nearby
17 EPA-permitted facilities operate within about 5 miles of Fawn Lake under Clean Water Act (NPDES) discharge permits. 12 facilities have a reported Clean Water Act violation in the past three years.
- Westview Mobile Home Park WwtpUnion · 1.9 mi away · NPDES MO0111902Recent violation
- Fcpwsd No. 1 Twin Lakes WwtpUnion · 2 mi away · NPDES MO0114189Recent violation
- Fcpwsd No.1 Baucky View Subd WwtpUnion · 2.4 mi away · NPDES MO0131431Recent violation
- Fcpwsd No. 1 Krakow Area WwtfWashington · 2.9 mi away · NPDES MO0126241Recent violation
- Countryside Mhp WwtpBeaufort · 3.1 mi away · NPDES MO0120014Recent violation
- Franklin County Industrial Park WwtpWashington · 3.5 mi away · NPDES MO0110787Recent 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 Franklin County
Frequently asked questions about Fawn Lake
Where is Fawn Lake?
- Fawn Lake is a lake in Franklin County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Fawn Lake?
- Fawn Lake in Franklin County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.6 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 10.8 µg/L. Surface area: 25 acres.
Is Fawn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Fawn Lake?
- No published bathymetric survey covers Fawn Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 25 acres.
Explore Fawn Lake across LakeQuality
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Where this data comes from
24 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC24 samples · 2024
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)