Summary Review of Performance of Metal Mines
Subject to the Metal Mining Effluent Regulations
in 2010

Overall Compliance Assessment for Prescribed Deleterious Substances and pH in 2010

Overall, the metal mining sector is achieving over 99% compliance with the prescribed limits for arsenic, copper, nickel, zinc, radium 226 and pH, and a 100% compliance rate for cyanide and lead.
Only a few sporadic exceedances were reported for arsenic, copper, nickel, zinc, radium 226 and pH.
In 2010, the overall compliance rate achieved by the metal mining sector with respect to meeting the total suspended solids limits was 95.6%. Complexe métallurgique Sorel-Tracy, Niobec Mine and Wabush Mines Joint Venture – Scully Mine failed to consistently meet total suspended solids limits.