Mirror Lake
Mirror Lake in Waupaca County, Wisconsin has a water quality grade of B (Good). Water clarity: 13 ft visibility. Phosphorus: 16.3 µg/L. Maximum depth: 43 ft. Surface area: 14 acres.
Wisconsin DNR lists Panfish as common on Mirror Lake. DNR survey details →
- Clarity
- 13 ft
- Max depth
- 43 ft
- Area
- 14 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Mirror Lake is a 14-acre mesotrophic lake in Waupaca County, Wisconsin with a maximum depth of 43 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available. Compared to the 20 other monitored lakes in Waupaca County, Mirror Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-20. Grade methodology: LakeQuality 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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 13 ft. Phosphorus level: 16.3 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | Not graded |
| Phosphorus | 16.3 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Mirror Lake
Compare lakeside cabins, hotels, and vacation rentals near Mirror Lake in Waupaca 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.
Top-rated places to stay near Mirror Lake
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Wisconsin DNR lists Panfish as common on Mirror Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Mirror Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 4 years of monitoring is improving. 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. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 43 ft |
| Surface Area | 14 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Mirror 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.
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.5 m/yr | 2 |
| Phosphorus | ↑ Improving | -9.77 µg/L/yr | 3 |
EPA Impairment Status
Mirror Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10009407 · Official waterbody report
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Mirror Lake 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.
- Waupaca Wastewater Treatment FacilityWaupaca · 0.8 mi away · NPDES WI0030490MajorRecent violation
- Waupaca Foundry, Inc. Plant No. 1Waupaca · 0.6 mi away · NPDES WI0026379Recent 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.
County Ranking
Ranked #2 of 21 lakes in Waupaca County
Nearby Lakes in Waupaca County
Frequently asked questions about Mirror Lake
Where is Mirror Lake?
- Mirror Lake is a lake in Waupaca County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Mirror Lake?
- Mirror Lake in Waupaca County, Wisconsin has a water quality grade of B (Good). Water clarity: 13 ft visibility. Phosphorus: 16.3 µg/L. Maximum depth: 43 ft. Surface area: 14 acres.
Is Mirror Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Mirror Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Mirror Lake?
- Mirror Lake has a maximum depth of 43 feet. The lake covers 14 acres.
What fish are in Mirror Lake?
- Fish species found in Mirror Lake include Panfish, Largemouth Bass, Northern Pike, Trout. Mirror Lake is located in Waupaca County, Wisconsin.
What did the DNR fisheries survey find at Mirror Lake?
- Wisconsin DNR lists Panfish as common on Mirror Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Mirror Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 4 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Mirror Lake across LakeQuality
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Moderate nutrients, good water quality
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Where this data comes from
25 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX25 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes