Humeston Reservoir
Wayne County, WisconsinEutrophic
Humeston Reservoir is a 37-acre productive, nutrient-rich eutrophic lake in Wayne County, IA. Water quality is graded F based on 2 sampling years through 2024. Compared to the 2 other monitored lakes in Wayne County, Humeston Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-09. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.6 ft of visibility. Chlorophyll-a: 41.4 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 41.4 µg/L | F |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 37.4 acres |
Location
County Ranking
Ranked #3 of 3 lakes in Wayne County
Cleaner Lakes Within 30 Miles
Humeston Reservoir holds Grade F. 2 nearby lakes hold higher grades.
- DBob White LakeWayne County · 12.6 mi · Higher grade (F → D)
- DWest Lake OsceolaClarke County · 19 mi · Higher grade (F → D)
Nearby Lakes in Wayne County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Humeston Reservoir is a man-made reservoir impounded by the Humeston Reservoir Dam (completed 1916), built primarily for water supply on the TR-CHARITON RIVER; earth-type dam, 31 ft tall and 670 ft long.
- Surface area
- 37.4 ac
- Normal storage
- 340 ac-ft
- Max storage
- 900 ac-ft
- Drainage area
- 1.02 sq mi
- Hazard class
- Significant
- Owner
- City of Humeston
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID IA01383 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-09
Monitoring stations: 1