From March 20 through April 17, the disinfectant in the water will switch temporarily from chloramine to chlorine, as part of routine cleaning of the drinking water systems by crews from the Washington Aqueduct.
Aqueduct crews will also add a corrosion control inhibitor during the switch to prevent the potential release of lead in system pipes throughout the region. County officials said extensive research in Arlington has never found any lead service lines or lead pipes inside homes.