Ember Lake
Ember Lake in Polk County, Wisconsin has a water quality grade of B (Good). Water clarity: 8.2 ft visibility. Phosphorus: 20.2 µg/L.
- Clarity
- 8.2 ft
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Ember Lake is a mesotrophic lake in Polk County, Wisconsin. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 54 other monitored lakes in Polk County, Ember Lake ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-09. 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)
Moderate clarity, visible to about 8.2 ft. Phosphorus level: 20.2 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.2 ft | Not graded |
| Phosphorus | 20.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Ember Lake
Compare lakeside cabins, hotels, and vacation rentals near Ember Lake in Polk 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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Recreation & Access
- Greenquist LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Ember Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.5 m/yr | 2 |
| Phosphorus | → Stable | -0.4 µg/L/yr | 2 |
County Ranking
Ranked #22 of 55 lakes in Polk County
Nearby Lakes in Polk County
Frequently asked questions about Ember Lake
Where is Ember Lake?
- Ember Lake is a lake in Polk County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ember Lake?
- Ember Lake in Polk County, Wisconsin has a water quality grade of B (Good). Water clarity: 8.2 ft visibility. Phosphorus: 20.2 µg/L.
Is Ember Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Ember Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
Are there boat ramps on Ember Lake?
- Ember Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Greenquist Lake. Public access is listed as yes.
Explore Ember Lake across LakeQuality
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Fish species and best lakes in Polk County
Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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State Parks Near Ember Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
12 measurements from 2 monitoring stations, 2023–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX12 samples · 2023–2024
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
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
Named boat-access points from the USGS National Boat Ramps inventory