Anna Lake
Anna Lake in Otter Tail County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 513 acres.
- Area
- 513 acres
- Public access
- Yes
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Why Anna Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Anna Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Anna Lake is a 513-acre lake in Otter Tail County, Minnesota. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Anna Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Anna Lake
Compare lakeside cabins, hotels, and vacation rentals near Anna Lake in Otter Tail County, Minnesota — 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 Anna Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 513 acres |
| Public Access | Yes |
No bathymetric survey has been published for Anna Lake, so its depth is not documented here.
Recreation & Access
- Anna LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Anna Lake
Nearby Lakes in Otter Tail County
Frequently asked questions about Anna Lake
Where is Anna Lake?
- Anna Lake is a lake in Otter Tail County, Minnesota. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Anna Lake?
- Anna Lake in Otter Tail County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 513 acres.
Is Anna Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Anna Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Anna Lake?
- Anna Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Anna Lake. Public access is listed as yes.
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Where this data comes from
Measurements for Anna Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory