Goodwiler Lake
Iowa County, Wisconsin23 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Goodwiler Lake. Here is what has been measured.
- Eutrophic
- Curly-Leaf Pondweed
- 5 ft max depth
- Public access
- Limited data
Goodwiler Lake in Iowa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 4.7 ft visibility. Phosphorus: 29.7 µg/L. Maximum depth: 5 ft. Surface area: 23 acres.
Wisconsin DNR lists Panfish as present on Goodwiler Lake. DNR survey details →
Goodwiler Lake is a 23-acre productive, nutrient-rich eutrophic lake in Iowa County, Wisconsin with a maximum depth of 5 feet. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. 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. Methodology: how these readings are compared.
What Goodwiler Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing3 species recorded
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Goodwiler Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Goodwiler Lake
These are the measurements Wisconsin DNR publishes for Goodwiler Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.7 ft. Phosphorus 29.7 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 29.7µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Goodwiler Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as present on Goodwiler Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Goodwiler Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2023).
Fish Species (DNR-rated)
Lake Details
Max depth
5 ft
Surface area
23 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Goodwiler LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Goodwiler Lake
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Fish Species
Click a species to see every 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.
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.
Nearby Lakes in Iowa County
Frequently asked questions about Goodwiler Lake
Where is Goodwiler Lake?
- Goodwiler Lake is a lake in Iowa County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Goodwiler Lake?
- Goodwiler Lake in Iowa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. 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?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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.
What did the DNR fisheries survey find at Goodwiler Lake?
- Wisconsin DNR lists Panfish as present on Goodwiler Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Goodwiler Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Goodwiler Lake?
- Goodwiler Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Goodwiler Lake. Public access is listed as yes.
Can I fish at Goodwiler Lake?
- Goodwiler Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Goodwiler Lake across LakeQuality
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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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from 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