Foxboro Lake is a 4-acre productive, nutrient-rich eutrophic lake in Franklin County, Missouri. Water quality is graded D based on 2 sampling years through 2021. Compared to the 4 other monitored lakes in Franklin County, Foxboro Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2021-10-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4 ft. Chlorophyll-a: 68.2 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 68.2 µg/L | F |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 4 acres |
Where to stay near Foxboro Lake
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Fishing Foxboro Lake
Location
County Ranking
Ranked #5 of 5 lakes in Franklin County
Cleaner Lakes Within 30 Miles
Foxboro Lake holds Grade D. 5 nearby lakes hold higher grades.
- BSeetal LakeGasconade County · 21.5 mi · Two grade letters higher (D → B)
- BSherwood Lake Nr. DamWarren County · 27.2 mi · Two grade letters higher (D → B)
- CLost Valley LakeGasconade County · 6.8 mi · Higher grade (D → C)
- CPort Hudson LakeFranklin County · 7.3 mi · Higher grade (D → C)
- CPeaceful Valley LakeGasconade County · 11 mi · Higher grade (D → C)
Nearby Lakes in Franklin County
Explore Foxboro Lake across LakeGrade
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Foxboro Lake is a man-made reservoir impounded by the Foxboro Lake Dam (completed 1974), built primarily for fish and wildlife pond on the TR-KRIETE CREEK; earth-type dam, 33 ft tall and 810 ft long.
- Surface area
- 4 ac
- Normal storage
- 84 ac-ft
- Max storage
- 132 ac-ft
- Drainage area
- 108.8 sq mi
- Hazard class
- Significant
- Owner
- WILLIAM KRUMMEL
All listed purposes: Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID MO31298 · Operator website
EPA Impairment Status
Foxboro Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7382.00 · Official waterbody report
Regulated Pollution Sources Nearby
8 EPA-permitted facilities operate within about 5 miles of Foxboro Lake under Clean Water Act (NPDES) discharge permits. 4 facilities have a reported Clean Water Act violation in the past three years.
- Mfa Feed MillGerald · 1.2 mi away · NPDES MONX00579Recent violation
- Gerald WwtfGerald · 2.5 mi away · NPDES MO0045420Recent violation
- Rosebud North LagoonRosebud · 3.4 mi away · NPDES MO0091367Recent violation
- Rosebud South LagoonRosebud · 3.6 mi away · NPDES MO0091375Recent violation
- GeraldGerald · 1.3 mi away · NPDES MO0045390
- Newly Weds FoodsGerald · 1.5 mi away · NPDES MONX00935
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-10-12
Monitoring stations: 1