Meder Lake
Ashland County, Wisconsin135 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Meder Lake. Here is what has been measured.
- Purple Loosestrife
- 10 ft max depth
- Public access
- Limited data
Meder Lake in Ashland County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.6 ft visibility. Maximum depth: 10 ft. Surface area: 135 acres.
Wisconsin DNR lists Northern Pike as common on Meder Lake. DNR survey details →
Meder Lake is a 135-acre lake in Ashland County, Wisconsin with a maximum depth of 10 feet. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-07-28. Methodology: how these readings are compared.
What Meder Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing4 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Meder 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 Meder Lake
These are the measurements Wisconsin DNR publishes for Meder 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 3.6 ft. TSI 58.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Meder Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Northern Pike as common on Meder Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Meder 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. 3 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
10 ft
Surface area
135 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Meder 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 Meder Lake
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Top-rated places to stay near Meder Lake
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Follow Meder Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Meder 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 Meder Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Mellen City OfMellen · 3.6 mi away · NPDES WI0020311Recent violation
- Wi Dnr Copper Falls State ParkClam Falls · 3.6 mi away · NPDES WI0030449
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 Ashland County
Frequently asked questions about Meder Lake
Where is Meder Lake?
- Meder Lake is a lake in Ashland County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Meder Lake?
- Meder Lake in Ashland County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.6 ft visibility. Maximum depth: 10 ft. Surface area: 135 acres.
Is Meder Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Meder Lake?
- Meder Lake has a maximum depth of 10 feet. The lake covers 135 acres.
What fish are in Meder Lake?
- Fish species found in Meder Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Meder Lake is located in Ashland County, Wisconsin.
What did the DNR fisheries survey find at Meder Lake?
- Wisconsin DNR lists Northern Pike as common on Meder Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Meder 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 Meder Lake?
- Meder Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Meder Lake. Public access is listed as yes.
Can I fish at Meder Lake?
- Meder 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 Meder Lake across LakeQuality
3 documented falls within 13.9 mi, nearest Brownstone Falls
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Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2022
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