January 01, 2018 Loudoun Water's hours of operation are Monday through Friday, between 8 a.m. and 5 p.m. Below is the list of 2018 holidays when Loudoun Water offices will be closed. If you have an emergency requiring immediate assistance, please call 571-291-7878. New Year's DayMonday, January 1, 2018Tuesday, January 2, 2018Columbus DayMonday, October 8, 2018Martin Luther King Jr. Day Monday, January 15, 2018Veterans DayMonday, November 12, 2018Presidents' DayMonday, February 19, 2018Thanksgiving½ day Wednesday, November 21, 2018Thursday, November 22, 2018Friday, November 23, 2018Memorial DayMonday, May 28, 2018ChristmasMonday, December 24, 2018Tuesday, December 25, 2018Independence Day Wednesday, July 4, 2018New Year's EveMonday, December 31, 2018Labor Day Monday, September 3, 2018New Year's DayTuesday, January 1, 2019