Omer Lake
Omer Lake in Polk County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 5 ft visibility. Phosphorus: 66.6 µg/L. Surface area: 19 acres.
- Clarity
- 5 ft
- Area
- 19 acres
- Type
- Eutrophic
- Trend
- → Stable
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Omer Lake →
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Omer Lake is a 19-acre productive, nutrient-rich eutrophic lake in Polk County, Wisconsin. Water quality is graded D based on 1 sampling years through 2024. Water clarity 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, Omer Lake ranks #53 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-10. 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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 5 ft. Phosphorus level: 66.6 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 66.6 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Omer Lake
Compare lakeside cabins, hotels, and vacation rentals near Omer 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Omer Lake are listed below.
Top-rated places to stay near Omer Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 19 acres |
| Public Access | Yes |
No bathymetric survey has been published for Omer Lake, so its depth is not documented here.
Recreation & Access
- Apple RiverPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Omer Lake
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1 m/yr | 2 |
| Phosphorus | ↑ Improving | -5.5 µg/L/yr | 2 |
EPA Impairment Status
Omer Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5R).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10005025 · Official waterbody report · Matched by proximity (2.49 km)
County Ranking
Ranked #53 of 55 lakes in Polk County
Nearby Lakes With Higher Grades
Omer Lake holds Grade D. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Polk County
Frequently asked questions about Omer Lake
Where is Omer Lake?
- Omer Lake is a lake in Polk County, Wisconsin. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Omer Lake?
- Omer Lake in Polk County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 5 ft visibility. Phosphorus: 66.6 µg/L. Surface area: 19 acres.
Is Omer Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Omer Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Are there boat ramps on Omer Lake?
- Omer Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Apple River. Public access is listed as yes.
Explore Omer Lake across LakeQuality
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High nutrients, frequent algae, reduced clarity
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Other Grade D Lakes in Wisconsin
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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
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