The Tintic Standard Reduction Mill—also known as the Tintic Mill or Harold Mill—built in 1920, and only operating from 1921 to 1925, is an abandoned refinery or concentrator located on the west slope of Warm Springs Mountain on the southern edge of Genola, Utah, United States.

The metal content of ore was increased through the process to make transportation less expensive.

At the mill's highest productivity it processed 200 tons of ore daily from the Tintic Mining District.

The site dominates the surrounding landscape with its size and unique colors and shapes.

It has been speculated that the mill may be the contributor of heavy metal pollution in the Warm Springs which lie below it.