Fawn Lake
Franklin County, Missouri25 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- #2 of 3 in the county
- 38 ft max depth
- Limited data
Fawn Lake in Franklin County, Missouri has a water quality grade of C (Fair). Water clarity: 3.6 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 10.8 µg/L. Surface area: 25 acres.
- Clarity
- 3.6 ft
- Max depth
- ~38 ft est.
- Area
- 25 acres
- Type
- Eutrophic
- Phosphorus
- 30 µg/L
- Chlorophyll-a
- 10.8 µg/L
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Watch Fawn Lake’s letter
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Fawn Lake is a 25-acre productive, nutrient-rich eutrophic lake in Franklin County, Missouri with an estimated average depth of about 38 feet. Water quality is graded C based on 2 sampling years through 2024. 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. 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)
Murky, only visible to about 3.6 ft. Phosphorus 30 µg/L. Chlorophyll-a 10.8 µg/L. TSI 55. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | Not graded |
| Phosphorus | 30 µg/L | Fair |
| Chlorophyll-a (Algae) | 10.8 µg/L | Fair |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~38 ft est. |
| Average Depth | ~13 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
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.
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.
County Ranking
Ranked #2 of 3 lakes in Franklin County
Nearby Lakes With Higher Grades
Fawn Lake holds Grade C. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Franklin County
Frequently asked questions about Fawn Lake
Where is Fawn Lake?
- Fawn Lake is a lake in Franklin County, Missouri. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Fawn Lake?
- Fawn Lake in Franklin County, Missouri has a water quality grade of C (Fair). 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?
- The C is nutrients and algae, 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
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
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)
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)