The D.C. Water and Sewer Authority is conducting its annual program to flush water mains throughout the city, a procedure designed to remove sediment and improve water quality.

From 10 p.m. to 6:30 a.m. Sunday through Thursday, WASA crews are opening fire hydrants in designated neighborhoods and flushing water.

The water supply to customers is not shut off during the flushing.

Customers might notice some water discoloration early in the morning. If that happens, WASA recommends that residents open the cold water tap and allow the water to flow slowly until it is clear.

Customers should not run hot water or do laundry during the flushing. If the hot water becomes discolored, WASA recommends flushing the hot water tank by opening the valve at the bottom of the tank.

The flushing program will continue through November.

These neighborhoods, with boundary streets, are scheduled for flushing the week starting Sunday, according to information provided by WASA:

ANC 3D (work area in Northwest, bounded by Ashby Street, Hoban Road, Salem Lane and Canal Road).

ANC 3D (work area in Northwest, bounded by Reservoir Road, 44th Street, P Street and Canal Road).

ANC 8A (work area in Southeast, bounded by Howard Road, Stanton Road, Sheridan Road and Wade Road).

ANC 8A (work area in Southeast, bounded by Alabama Avenue, 21st Street, Southern Avenue and 13th Street).

ANC 8A (work area in Southeast, bounded by Morris Road, 18th Place-Stanton Road, Alabama Avenue and 13th Street).

ANC 8B (work area in Southeast, bounded by Alabama Avenue, Shipley Terrace, Southern Avenue and Naylor Road).

ANC 8C (work area bounded by Atlantic Street SE and SW, First Street SE, Galveston Street SW and Martin Luther King Avenue SE).

ANC 1A (work area in Northwest, bounded by Oak Street, 16th Street and Park Road).

ANC 1E (work area in Northwest, bounded by Park Road, 16th Street, Irving Street and Adams Mill Road).

ANC 4C (work area in Northwest, bounded by Allison Street, Eighth Street, Taylor Street and 14th Street).

ANC 4C (work area in Northwest, bounded by Ingraham Street, Georgia Avenue, Allison Street and 14th Street).

ANC 7B (work area in Southeast, bounded by Pennsylvania Avenue, Alabama Avenue and 27th Street).

ANC 7B (work area in Southeast, bounded by Alabama Avenue, Pennsylvania Avenue, Southern Avenue and Branch Avenue).

ANC 7A (work area in Southeast, bounded by East Capitol Street, Benning Road, Ely Place and Anacostia Avenue).

ANC 7A (work area in Southeast, bounded by C Street, Texas Avenue, Ely Place and 40th Place).

ANC 7A (work area in Southeast, bounded by Bass Place, 51st Street, Southern Avenue and Benning Road).

ANC 7A (work area in Southeast, bounded by B Street, Southern Avenue and 51st Street).

ANC 7A (work area in Southeast, bounded by East Capitol Street, Southern Avenue, B Street and 51st Street).

ANC 7A (work area in Northeast, bounded by Benning Road, East Capitol Street and Minnesota Avenue).

ANC 7A (work area in Southeast, bounded by East Capitol Street, 51st Street, C Street and Benning Road).

ANC 8D (work area in Southeast, bounded by Valley Avenue, Fourth Street, Southern Avenue and First Street).