Two cities, one in the United States and the other in Canada, over 700 miles (1100 kilometers) apart, were experiencing nearly identical problems caused by manual addition of powdered activated carbon to their municipal water treatment systems. Both cities not only eliminated a health hazard caused by carbon powder dust, but also reduced the amount of labor required to add powdered activated carbon to the system by installing a Flexicon Bulk Bag Unloading System.
The city of Swift Current draws its municipal water supply from a reservoir formed by a dam on the Swift Current Creek. Potassium permanganate is added to a concentration of 1.5 parts per million (ppm) and the water is gravity fed into a low well, where powdered activated carbon is added in the form of a slurry. Reaching a final concentration of 20 ppm, its function is to adsorb organic materials, eliminating unwanted tastes and odors.