Site-specific water quality criteria may evolve from national water quality criteria based on site water characteristics. Suspended solids may be an important modifying parameter. A model is presented relating suspended solids characteristics (organic carbon content and suspended solids concentration) with a neutral organic chemical's sorption coefficient. Investigation of case studies with acenaphthene, dieldrin, and chrysene shows the dissolved and particulate-bound fractions (C_d and C_p) of total chemical concentration (C_t) to be dependent upon these factors. The model may be used to predict C_p and C_d in site waters. The model shows that chemicals with low K_p values in the presence of low suspended solids concentrations and organic matter are relatively unaffected by suspended solids. Conversely, chemicals with high K_p values, high suspended solids concentrations, and organic matter would be primarily sorbed to suspended solids.