Updated on May 13, 2021 at 4:32 pm Orange County's COVID-19 positivity rate for its underprivileged ZIP codes hardest hit by the pandemic was lower Thursday than the county's overall positivity, the first time that has happened since the county began measuring the rates. “For the first time since measuring our health equity quartile, our test positivity is 0.9%,” compared with 1% for the county's overall positivity rate, Orange County CEO Frank Kim said. “It's the first time those two lines have crossed.” Download our mobile app for iOS or Android to get the latest breaking news and local stories. The county's case rate has also fallen to 1.7 per 100,000 as of Thursday, continuing a trend that has the county meeting the criteria to graduate up to the least-restrictive yellow tier in the state's economic reopening plan.