Black Rock Lake
Grant County, Washington66 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
Black Rock Lake in Grant County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 66 acres.
Black Rock Lake is a 66-acre lake in Grant County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Black Rock Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Black Rock Lake
These are the measurements Washington Ecology publishes for Black Rock Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Black Rock Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
66 acres
Shoreline
3.4 mi
No bathymetric survey has been published for Black Rock Lake, so its depth is not documented here.
Stays via Stay22
Stays near Black Rock Lake
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Frequently asked questions about Black Rock Lake
Where is Black Rock Lake?
- Black Rock Lake is a lake in Grant County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Black Rock Lake?
- Black Rock Lake in Grant County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 66 acres.
Is Black Rock Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Black Rock Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.