The special session on pesticides at the 21st Annual International Conference on Soils, Sediments and Water consisted of a diverse set of topics concerned with pesticide contamination of soils, sediments and water. It covered analysis, site assessment, risk assessment and remediation of pesticides of concern. It well attended by a cross section of conference attendees. This year there were over 800 attendees who came from state agencies (6 states, 27 agencies), federal and military agencies (21 states), petroleum, chemical, transportation and utility industries (12 states, 13 companies), academic institutions (23 states, 63 institutions), and consulting agencies (20 states, 102 companies). In addition there were foreign participants from Argentina, Australia, Belgium, Brazil, Bulgaria, Canada, Czech Republic, Denmark, France, Germany, Italy, Japan, Lithuania, Mexico, the Netherlands, Nigeria, Puerto Rico, Russia, Sierra Leone, Taiwan and the United Kingdom. The session had the potential to reach a large range of professionals from diverse geographical sections of the country and the world.