Chris Johnson, operator at the wastewater treatment plant in Harmony, attended the annual Wastewater Operations Conference, sponsored by the Minnesota Pollution Control Agency, March 20 to 22, in Brooklyn Park.

He joined more than 500 other professionals who operate the treatment plants that keep Minnesota's rivers, streams and 10,000 lakes clean and safe for drinking, fishing, swimming and boating, and help protect public health for 5.3 million state residents.

During the conference, he learned about the latest methods and technologies that help clean-water plants meet ever-stricter quality standards to help ensure fishable, swimmable waterways. The classes and seminars he attended will help him operate the wastewater treatment plant more effectively and efficiently.

The Harmony wastewater treatment plant helps sustain safe, clean water in the Pine Creek stream and preserves public health, wildlife habitat, recreation and scenic values for the city's and downstream residents.