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Welcome to the Community Action Corporation of South Texas Community Action Corporation of South Texas CACOST is a nonprofit organization established in 1971 and incorporated in Texas. Community Action provides a variety of services throughout South Texas. Our Programs Community Services Serving as the heart of our organization our community programs work to strengthen South Texas by providing its members the tools necessary to improve their quality of life. Our Programs Head Start Birth to Five The Head Start Birth to Five Program provides child development services in a centerbased setting and ensures school readiness.