RENO, Nev. (AP) — The U.S. Environmental Protection Agency has ordered three northern Nevada gold mines to pay a total of $618,000 for failing to report the release of toxic chemicals, including cyanide, lead and mercury from 2005-08.

All three mines are subsidiaries of the Toronto-based Barrick Gold Corp. — Barrick Cortez Inc.’s Cortez Gold Mine near Crescent Valley, Barrick Gold US Inc.’s Ruby Hill Gold Mine near Eureka and Homestake Mining Co.’s Bald Mountain Gold Mine near the Ruby Lake National Wildlife Refuge.