Banks Lake is a cold, clear oligotrophic lake in Grant County, Washington. Water quality is graded A based on 3 sampling years through 2024. Compared to the 12 other monitored lakes in Grant County, Banks Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Washington DNR, last sampled 2024-08-07. Grade methodology: LakeGrade methodology.
Watch Banks Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 19.4 ft down. Phosphorus level: 13 µg/L. Chlorophyll-a: 1.3 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19.4 ft | A |
| Phosphorus | 13 µg/L | A |
| Chlorophyll-a (Algae) | 1.3 µg/L | A |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Banks Lake
Compare lakeside cabins, hotels, and vacation rentals near Banks Lake in Grant 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 Banks Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Banks Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Banks Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Banks Lake
Location
County Ranking
Ranked #1 of 13 lakes in Grant County
Nearby Lakes in Grant County
Explore Banks Lake across LakeGrade
More Washington Lake Rankings
Other Grade A Lakes in Washington
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-07
Monitoring stations: 2