Lake Fisher is a 87-acre productive, nutrient-rich eutrophic lake in Davis County, Iowa. Water quality is graded F based on 2 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 1 other monitored lakes in Davis County, Lake Fisher ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-09-09. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2 ft of visibility. Chlorophyll-a: 30.2 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 30.2 µg/L | F |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 87 acres |
Where to stay near Lake Fisher
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Fishing Lake Fisher
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.17 m/yr | 2 |
| Chlorophyll-a | → Stable | -0.2 µg/L/yr | 2 |
Location & Depth Map
Free interactive depth-contour map of Lake Fisher, reaching a maximum surveyed depth of 21 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Iowa DNR.
County Ranking
Ranked #2 of 2 lakes in Davis County
Cleaner Lakes Within 30 Miles
Lake Fisher holds Grade F. 3 nearby lakes hold higher grades.
- BLacey Keosauqua LakeVan Buren County · 25 mi · Two grade letters higher (F → B)
- CLake WapelloDavis County · 8 mi · Two grade letters higher (F → C)
- DRathbun LakeAppanoose County · 24 mi · Higher grade (F → D)
Nearby Lakes in Davis County
Explore Lake Fisher across LakeGrade
More Iowa Lake Rankings
Other Grade F Lakes in Iowa
Eutrophic Lakes in Iowa
More records, surveys & data sources
Reservoir Info (USACE NID)
Lake Fisher is a man-made reservoir impounded by the Lake Fisher Dam (completed 1937), built primarily for water supply on the TR-FOX RIVER; earth-type dam, 43 ft tall and 820 ft long.
- Surface area
- 87 ac
- Normal storage
- 1,128 ac-ft
- Max storage
- 2,166 ac-ft
- Drainage area
- 2.25 sq mi
- Hazard class
- Significant
- Owner
- City of Bloomfield
Source: USACE National Inventory of Dams, NID ID IA01339 · Operator website
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Lake Fisher under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Bloomfield City Of Stp (Main)Bloomfield · 2.1 mi away · NPDES IA0047929MajorRecent violation
- Drakesville, City Of (Rathbun Regional Water Assoc.)Drakesville · 2.5 mi away · NPDES IA0075612Recent 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.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-09
Monitoring stations: 1