Alice Wyth Lake is a highly nutrient-loaded hypereutrophic lake in Black Hawk County, Iowa. Water quality is graded F based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 6 other monitored lakes in Black Hawk County, Alice Wyth Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-09-11. 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 1.6 ft of visibility. Chlorophyll-a: 101.6 µg/L. Trophic State Index: 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 101.6 µg/L | F |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Alice Wyth Lake
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Fishing Alice Wyth Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | 0 m/yr | 2 |
| Chlorophyll-a | ↑ Improving | -5.1 µg/L/yr | 2 |
Recreation & Access
Location
County Ranking
Ranked #7 of 7 lakes in Black Hawk County
Cleaner Lakes Within 30 Miles
Alice Wyth Lake holds Grade F. 3 nearby lakes hold higher grades.
- DMitchell LakeBlack Hawk County · 6.6 mi · Higher grade (F → D)
- DFisher LakeBlack Hawk County · 0.7 mi · Higher grade (F → D)
- DGreen Belt LakeBlack Hawk County · 3.9 mi · Higher grade (F → D)
Nearby Lakes in Black Hawk County
Explore Alice Wyth Lake across LakeGrade
More Iowa Lake Rankings
Other Grade F Lakes in Iowa
Hypereutrophic Lakes in Iowa
More records, surveys & data sources
EPA Impairment Status
Alice Wyth Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-CED-465 · Official waterbody report · Matched by proximity (2.09 km)
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Alice Wyth Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 3 facilities have a reported Clean Water Act violation in the past three years.
- Cedar Falls City Of StpCedar Falls · 1 mi away · NPDES IA0036633MajorRecent violation
- Streeter Generating StationCedar Falls · 0.9 mi away · NPDES IA0002534Recent violation
- Nazareth Lutheran ChurchCedar Falls · 1.8 mi away · NPDES IA0080047Recent violation
- Viking Pump, Inc. - Main PlantCedar Falls · 1.1 mi away · NPDES IA0060275
- Viking Pump, Inc. - Alloys FoundryCedar Falls · 1.1 mi away · NPDES IA0069205
- Cedar Falls, City Of MS4Cedar Falls · 1.4 mi away · NPDES IA0078263
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
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-09-11
Monitoring stations: 1