Goodwiler Lake
Goodwiler Lake in Iowa County, Wisconsin has a water quality grade of C (Fair). Water clarity: 4.7 ft visibility. Phosphorus: 29.7 µg/L. Maximum depth: 5 ft. Surface area: 23 acres.
- Clarity
- 4.7 ft
- Max depth
- 5 ft
- Area
- 23 acres
- Type
- Eutrophic
- Public access
- Yes
Next lake in Iowa County
Goodwiler Lake is a 23-acre productive, nutrient-rich eutrophic lake in Iowa County, Wisconsin with a maximum depth of 5 feet. Water quality is graded C based on 1 sampling years through 2023. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 3 public boat landings. Compared to the 5 other monitored lakes in Iowa County, Goodwiler Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-10-30. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Murky, only visible to about 4.7 ft. Phosphorus level: 29.7 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.7 ft | Not graded |
| Phosphorus | 29.7 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Goodwiler Lake
Compare lakeside cabins, hotels, and vacation rentals near Goodwiler Lake in Iowa County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 5 ft |
| Surface Area | 23 acres |
| Public Access | Yes |
Recreation & Access
- Muscoda WestPublic
- Victora Riverside ParkPublic
- Goodwiler LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Goodwiler Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2023).
Fish Species (DNR-rated)
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Goodwiler Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Muscoda Wastewater Treatment FacilityMuscoda · 0.8 mi away · NPDES WI0060615Recent violation
- Meister Cheese & Muscoda ProteinMuscoda · 0.6 mi away · NPDES WI0055069
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.
County Ranking
Ranked #2 of 6 lakes in Iowa County
Nearby Lakes in Iowa County
Frequently asked questions about Goodwiler Lake
What is the water quality grade for Goodwiler Lake?
- Goodwiler Lake in Iowa County, Wisconsin has a water quality grade of C (Fair). Water clarity: 4.7 ft visibility. Phosphorus: 29.7 µg/L. Maximum depth: 5 ft. Surface area: 23 acres.
Is Goodwiler Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Goodwiler Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
How deep is Goodwiler Lake?
- Goodwiler Lake has a maximum depth of 5 feet. The lake covers 23 acres.
What fish are in Goodwiler Lake?
- Fish species found in Goodwiler Lake include Panfish, Largemouth Bass, Northern Pike. Goodwiler Lake is located in Iowa County, Wisconsin.
Are there boat ramps on Goodwiler Lake?
- Goodwiler Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Muscoda West, Victora Riverside Park, Goodwiler Lake. Public access is listed as yes.
Explore Goodwiler Lake across LakeGrade
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High nutrients, frequent algae, reduced clarity
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Other Grade C Lakes in Wisconsin
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Where this data comes from
12 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX12 samples · 2023
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory