![A Weed Patch in this Ontario City Turned Out to Be a Magnet for a Treasured Species](https://cole-tpomag.imgix.net/https%3A%2F%2Fwww.tpomag.com%2Fuploads%2Fimages%2F051.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=7d2e8cc0b778870026363041fe28c52f)
Michael Loken, manager of wastewater treatment for the City of Sudbury, overlooks the milkweed patch that has grown near the facility’s chlorine contact chamber.
During summer, hundreds of migrating monarch butterflies are attracted to the Greater Sudbury Wastewater Treatment Plant.
A nearly half-acre milkweed patch on the back side of the chlorine contact chamber and near its receiving water, Junction Creek, provides a habitat for the...