Ero Copper Corp. reported production results for the fourth quarter and year of 2021. For the quarter, the company reported at the MCSA Mining Complex mill throughput of 646,319 tonnes of ore grading 1.99% copper resulted in 11,918 tonnes of copper in concentrate produced after average metallurgical recoveries of 92.7% during the period; and at the NX Gold Mine, mill throughput of 47,159 tonnes of ore grading 6.24 gpt gold resulted in 8,544 ounces of gold produced and 5,859 ounces of silver produced as by-product after average metallurgical recoveries of 90.3% during the period.

For the year, the company reported at the MCSA Mining Complex, approximately 2.4 million tonnes of ore grading 2.08% copper was processed during the year, resulting in 45,511 tonnes of copper in concentrate produced after average metallurgical recoveries of 92.4%; and at the NX Gold Mine, 171,581 tonnes of ore grading 7.27 grams per tonne ("gpt") gold was processed during the year, producing 37,798 ounces of gold and 25,031 ounces of silver as by-product after average metallurgical recoveries of 94.2%.