In Washington state, a percent of positive tests are sent to the dept of health ...

In Washington state, a percent of positive tests are sent to the dept of health for variant sequencing. You can see the published results by week. Delta has outcompeted every other variant for several months. All covid is essentially delta.

See page [pdf] 5 on this: https://www.doh.wa.gov/Portals/1/Documents/1600/coronavirus/...

It is updated every Wednesday