Deutsch: Zerstörungs- und Entfernungseffizienz / Español: Eficiencia de Destrucción y Remoción / Português: Eficiência de Destruição e Remoção / Français: Efficacité de Destruction et d'Élimination / Italiano: Efficienza di Distruzione e Rimozione /

A Destruction and Removal Efficiency (DRE) is a percentage that represents the number of molecules of a compound removed or destroyed in an incinerator relative to the number of molecules entering the system (e.g. a DRE of 99.99 percent means that 9,999 molecules are destroyed for every 10,000 that enter; 99.99 percent is known as "four nines." For some pollutants, the RCRA removal requirement may be as stringent as "six nines").