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American Academy of Sanitarians Inc. Protecting Environmental Health Since 1966 AAS Welcomes You. Prestigious Recognition for Environmental Health Professionals The American Academy of Sanitarians AAS is an organization that elevates the standards improves the practice advances the professional proficiency and promotes the highest levels of ethical conduct among professionals in every field of environmental health. The AAS was formed in 1966 to improve the environmental health status of individuals through certification of those professionally credentialed environmental health practitioners who in an outstanding manner have helped or are helping to achieve this long range goal.