3 p.m. update: The city of Richmond reports that the first round of testing has returned, and did not find any bacteria in the water.

Original story:

A second round of water collection for testing will begin on Friday in Richmond and Henrico.

Once testing begins, both localities will be as little as 24 hours away from lifting their boil water advisories, as long as the testing goes as planned.

Results from the first round of testing, collected Thursday, are expected to arrive in their entirety at 3 p.m. on Friday in Richmond.

Part of the test is to monitor for chlorine levels, which has been successfully completed. The other component is to monitor for bacterial growth, which requires monitoring the sample for 24 hours.

Richmond Mayor Danny Avula called the possibility of bacteria in the water "extremely unlikely," noting that the city has run its own tests, independent of Virginia Department of Health protocols, throughout the process.

City officials said the results would be released to the public as soon as they come in.

Avula said at a Friday update that the Byrd Park reservoir is now full, and water pressure has been restored across the city.

In Henrico, Bentley P. Chan, director of the Department of Public Utilities, offered a similar update, and suggested that Saturday afternoon is the time to watch for the boil water advisory to be lifted in the county.

Avula also said, in response to questions from journalists, that the city has already solicited bids for an independent investigation into what happened at the water plant. He wants to have the vendor selected by next week.

This has been a breaking news update.