Louis S. Jaffe, 63, professor of epidemiology and environmental health at the George Washington University School of Medicine died of a heart attack July 24 while vacationing in Israel.

He had joined the GW medical school staff in 1970 after retiring from the federal Public Health Service.

At his retirement after 31 years of federal service, Dr. Jaffe was physical science administrator, special assistant to the director, air quality criteria and standards development program.

He was considered a pioneer in the development of air quality criteria, described as the technical documents that define and quantify the effects of specific air pollutants on man, animals, vegetation and materials, and which serve as the cornerstone of national air quality standards.

Born in Newark, N.J., Jaffe was a graduate of Brooklyn College. He held a masters and doctoral degrees in biochemistry from Columbia University.

The author of numerous scientific papers, many of which were translated into foreign languages. Dr. Jaffe was a fellow of the Washington Academy of Sciences, the Aerospace Medical Association and the American Public Health Association.

He was the current vice president of the National Capital Area of B'nai B'rith Lodges, and was a past president of the Cardoza and Montgomery Lodges and of the Woodside Park Civic Association in Silver Spring.

Dr. Jaffe was a former chairman of the planning and zoning committee of the Montgomery County Civic Federation. He belonged to Temple Israel in Silver Spring.

He is survived by his wife, Annabelle, and a son, Barry of the home in Silver Spring and a brother, Bernard S. of North Miami, Fla.