Fox Valley Lake
Clark County, WisconsinMesotrophic
Fox Valley Lake is a 96-acre mesotrophic lake in Clark County, MO. Water quality is graded B based on 3 sampling years through 2024. Compared to the 1 other monitored lakes in Clark County, Fox Valley Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-07-31. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8.5 ft. Phosphorus level: 16.5 µg/L. Chlorophyll-a: 3.6 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | C |
| Phosphorus | 16.5 µg/L | A |
| Chlorophyll-a (Algae) | 3.6 µg/L | A |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 96 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Clark County
Nearby Lakes in Clark County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Taney County · Clarity: 10 ft
Warren County · Clarity: 5 ft
Taney County · Clarity: 8.7 ft
Adair County · Clarity: 4.1 ft
Warren County · Clarity: 5.9 ft
Stone County · Clarity: 6.9 ft
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Fox Valley Lake is a man-made reservoir impounded by the Fox Valley Dam (completed 1983), built primarily for recreation on the FOX CREEK; earth-type dam, 52 ft tall and 1,000 ft long.
- Surface area
- 96 ac
- Normal storage
- 1,532 ac-ft
- Max storage
- 4,347 ac-ft
- Drainage area
- 1.79 sq mi
- Hazard class
- High
- Owner
- MO DEPT OF CONSERVATION
Source: USACE National Inventory of Dams, NID ID MO12197 · Operator website
EPA Impairment Status
Fox Valley 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_7008.00 · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-07-31
Monitoring stations: 2