Omak Lake
Omak Lake in Okanogan County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 3332 acres.
- Area
- 3,332 acres
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Why Omak 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 Omak 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 WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Omak Lake is a 3,332-acre lake in Okanogan County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology, 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 Omak 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 Omak Lake
Compare lakeside cabins, hotels, and vacation rentals near Omak Lake in Okanogan County, Washington — 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 Omak Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 3,332 acres |
No bathymetric survey has been published for Omak Lake, so its depth is not documented here.
Fishing Omak Lake
Nearby Lakes in Okanogan County
Frequently asked questions about Omak Lake
Where is Omak Lake?
- Omak Lake is a lake in Okanogan County, Washington. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Omak Lake?
- Omak Lake in Okanogan County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 3332 acres.
Is Omak Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Omak 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 Omak Lake across LakeQuality
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Where this data comes from
Measurements for Omak Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.