Charleston County DSS Office SNAP Office location is 3366 Rivers Ave. North Charleston, SC – 29405. This is a local South Carolina DSS Office. You can apply at this office or go online to: SCMAPP.sc.gov. SCMAPP is an online application for South Carolinians to apply for many health and human service programs. Households, individuals, seniors and the homeless may all be eligible for SNAP benefits. People who are working and need help to stretch their income to purchase food may also be eligible for SNAP benefits as well as those receiving Social Security benefits, child support or unemployment. DSS administers the SNAP program through DSS county offices. Eligibility caseworkers interview applicants and approve those who qualify to receive the food benefit. Qualified applicants for the SNAP program begin receiving SNAP benefits within 30 days of their application. Some families and individuals need expedited benefits, which begin within seven days of application.