Ralph L. Hebbard, 92, a retired official of the old D.C. Water Department and a member of Masonic organizations, died Friday at Doctors' Hospital of Prince George's County. He had a respiratory ailment.

Mr. Hebbard was born in Lansing, Mich., and moved here with his family when he was a boy.In 1907 he went to work for the old D.C. Water Department.He served as acting water registrar for a time in the 1940s and was engineer of operations and maintenance in the meter division when he retired in 1953.

A Mason for more than 45 years, he received the General Grand Council's national award in 1975 in recognition of 40 years of outstanding service.

A 32nd degree Mason, he was a fortunate grand master of the Royal and Select Masters, Triangle Council of D.C., a former grand master of the Council of the Grand Council and treasurer of the council for more than 40 years, and a former master Mason of Naval Lodge No. 4 here.

He also was a former master Mason and secretary of Stansbury Lodge No. 24, which awarded him its fidelity medal, a special award held by only one honoree at a time.

Mr. Hebbard lived in Chevy Chase before moving to the Friends' House Nursing Home in Sandy Spring in 1971.

His wife, Elaine B., died in 1974.

Survivors include a son, Lester W., of Seabrook, Md.; a sister, Myrtle Quinn of St. Petersburg, Fla.; two granddaughters and a great-granddaughter. Another son, Russell, died in 1978.