Mary Adams Weber, 68, who was active in Montgomery County civic and school board activities, died Sunday at her Washington home after a heart attack.

In 1940, Mrs, Weber came to this area with her husband of two years, Eugene W. Weber, an authority on water resourses policy and planning and now a retired deputy director of civil works for policy for the Army Corps of Engineers.

Mrs. Weber was a longtime member of the Bethsada PTA and was active in the Bethsada library. She was a coordinating secretary for the Montgomery County Comprehsive Curriculum Study Commission in the 1950s and was a past president of the Bethesda-Chevy Chase chapter of the American Association of University Women.

She was born in Duluth, Minn., and graduated from the University of Minnesota.

She and her husband lived in Bethesda before moving to Washington in 1965.

Besides her husband, of the home, survivors include a son, Dr. Charles A., of San Francisco; a sister, Mrs. Lloyd Hale, of Minneapolis, and a brother, John T. Adams, of Duluth.

The family suggests that expressions of sympathy be in the form of contributions to the Scholarship-Fellowship Fund of the American Association of University Women in Washington.