I-US Environmental Protection Agency (i-EPA) ivuselele imihlahlandlela yabo yokungcola kwamazinyo ngo-2017. Abahlukanisi be-Amalgam manje sebedinga amazinga okusetshenziswa ngaphambi kokunciphisa ukukhishwa kwe-mercury emahhovisi amazinyo kuya emisebenzini yokwelapha ephethwe ngumphakathi (POTWs). I-EPA ilindele ukuthi ukuhambisana nalo mthetho wokugcina kuzonciphisa minyaka yonke ukukhishwa kwe-mercury ngamathani ayi-5.1 kanye namathani ayi-5.3 wezinye izinsimbi ezitholakala kumxube wamazinyo odoti kuma-POTW.
