Ucwaningo oluxhaswe yi-American Dental Association (ADA) lwalinganiselwa ngo-2003 ukuthi amaphesenti angama-50 e-mercury angena ePublicly Owned Treatment Works (POTWs) anikelwa ngamahhovisi amazinyo. I-IAOMT inikeza izixazululo zokuvikela abasebenzi, iziguli kanye nemvelo ezingozini ze-mercury yamazinyo.
