Emma Lake
Oneida County, Wisconsin227 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Emma Lake. Here is what has been measured.
- Impaired · Mercury
- 17 ft max depth
- Public access
- Limited data
Emma Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5.7 ft visibility. Maximum depth: 17 ft. Surface area: 227 acres.
Wisconsin DNR rates Panfish as abundant on Emma Lake. DNR survey details →
Emma Lake is a 227-acre lake in Oneida County, Wisconsin with a maximum depth of 17 feet. Overall water quality is improving over recent sampling years. The lake supports 5 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-28. Methodology: how these readings are compared.
What Emma Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing5 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Emma Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Emma 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 Emma Lake
These are the measurements Wisconsin DNR publishes for Emma 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 5.7 ft. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.7ft | 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. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Emma Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Panfish as abundant on Emma Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Emma Lake’s water-quality measurements separately, and the water-quality trend over 6 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. Monitored by volunteers since 1993. 1 station on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
Max depth
17 ft
Surface area
227 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Emma 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 Emma Lake
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Fish Species
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Fishing Emma Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
EPA Impairment Status
Emma Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10007843 · Official waterbody report
Nearby Lakes in Oneida County
Frequently asked questions about Emma Lake
Where is Emma Lake?
- Emma Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Emma Lake?
- Emma Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5.7 ft visibility. Maximum depth: 17 ft. Surface area: 227 acres.
Is Emma Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Emma Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Emma Lake?
- Emma Lake has a maximum depth of 17 feet. The lake covers 227 acres.
What fish are in Emma Lake?
- Fish species found in Emma Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Walleye. Emma Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Emma Lake?
- Wisconsin DNR rates Panfish as abundant on Emma Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Emma Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Emma Lake?
- Emma Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Emma Lake. Public access is listed as yes.
Can I fish at Emma Lake?
- Emma 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 Emma Lake across LakeQuality
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Where this data comes from
73 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX73 samples · 2020–2025
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
Impairment status from EPA ATTAINS 303(d) database
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory