The largest employer in the city is the 3M factory, where employees glue, cut, wrap and bundle the company’s flagship product – Post-it Notes. “Every Post-it Note in the world starts here.

Technology company 3M said products for the "personal care ... at its site in Penllergaer More than 100 jobs are at risk at a factory in Swansea after plans to close it were announced.

The Minnesota Pollution Control Agency (MPCA) is proposing a wastewater permit limiting the amount of hazardous chemicals allowed to be dumped into the Mississippi River from 3M’s Cottage Grove plant.