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Suncor plant in Commerce City spewing black, yellow smoke during equipment startup

Posted on May 11, 2026
By The Denver Post
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1 min read

Suncor plant in Commerce City spewing black, yellow smoke during equipment startup

Thick black smoke and yellow smoke plumes are billowing Monday afternoon from two smokestacks at the Suncor Energy refinery in Commerce City as the plant restarts equipment after performing maintenance.