Osar Lake
Osar Lake in Copper River County, Alaska is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 160 acres.
- Area
- 160 acres
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Why Osar 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 Osar 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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Osar Lake is a 160-acre lake in Copper River County, Alaska.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Osar Lake water quality
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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 Osar 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 Osar Lake
Compare lakeside cabins, hotels, and vacation rentals near Osar Lake in Copper River County, Alaska — 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 Osar Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 160 acres |
No bathymetric survey has been published for Osar Lake, so its depth is not documented here.
Fishing Osar Lake
Nearby Lakes in Copper River County
Frequently asked questions about Osar Lake
Where is Osar Lake?
- Osar Lake is a lake in Copper River County, Alaska. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Osar Lake?
- Osar Lake in Copper River County, Alaska is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 160 acres.
Is Osar Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Osar Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Osar Lake across LakeQuality
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Where this data comes from
Measurements for Osar Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.