WSSC Views 13 meanings found WSSC is most often used for the Washington Suburban Sanitary Commission, a regional public‑utility agency, but also appears in water‑supply businesses, a sailing challenge, and university student‑services facilities. Miscellaneous Welsh Springer Spaniel Club West Suburban Stamp Club Washington Suburban Sanitary Comission Community AM-1340, Sumter, South Carolina West Seattle Soccer Club Governmental Washington Suburban Sanitary Commission Western States Sign Council Western Slope Safety Council Academic & Science Weathering System Science Consortium Williams Student Services Center Business Water Supply and Storage Company Sports World Speed Sailing Challenge West Shore Soccer Club