Lewis Lake
Stoddard County, WisconsinHypereutrophic
Lewis Lake is a 6-acre highly nutrient-loaded hypereutrophic lake in Stoddard County, MO. Water quality is graded F based on 2 sampling years through 2021.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-07-07. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
No clarity data. Phosphorus level: 101 µg/L. Chlorophyll-a: 149.8 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 101 µg/L | F |
| Chlorophyll-a (Algae) | 149.8 µg/L | F |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 6 acres |
Location
County Ranking
Ranked #1 of 1 lakes in Stoddard County
Cleaner Lakes Within 30 Miles
Lewis Lake holds Grade F. 2 nearby lakes hold higher grades.
- DLake Wappapello Nr. DamWayne County · 24.3 mi · Higher grade (F → D)
- DLake Wappapello Lost Cr. Arm @ Sanderson Pt BottomWayne County · 27.6 mi · Higher grade (F → D)
Nearby Lakes in Stoddard County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
St. Louis County · Clarity: 1.6 ft
Jackson County · Clarity: 2 ft
St. Charles County · Clarity: 2.3 ft
St. Francois County · Clarity: 1.1 ft
Saline County · Clarity: 2.3 ft
Polk County · Clarity: 1.2 ft
Hypereutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lewis Lake is a man-made reservoir impounded by the Richards Dam (completed 1995), built primarily for fish and wildlife pond on the TR-WILLIAMS CREEK; earth-type dam, 20 ft tall and 268 ft long.
- Surface area
- 6 ac
- Normal storage
- 61 ac-ft
- Max storage
- 108 ac-ft
- Drainage area
- 57.6 sq mi
- Hazard class
- Low
- Owner
- MIKE RICHARDS
All listed purposes: Fish and Wildlife Pond;Grade Stabilization;Recreation.
Source: USACE National Inventory of Dams, NID ID MO50660 · Operator website · Matched by proximity (0.05 km)
EPA Impairment Status
Lewis 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_7346.00 · 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: 2021-07-07
Monitoring stations: 1