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Resident engineer Denekew Getahun and assistant director Sergio Serafino look at a set of bulbs on a section of the new ultraviolet light disinfection system at O'Brien Water Reclamation Plant in Skokie on March 16, 2016.
Anthony Souffle / Chicago Tribune
Resident engineer Denekew Getahun and assistant director Sergio Serafino look at a set of bulbs on a section of the new ultraviolet light disinfection system at O’Brien Water Reclamation Plant in Skokie on March 16, 2016.
Chicago Tribune
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Chicago River cleanup makes waterway safer for recreation.