The city of Auburn's slow sand filter plant is a pretty, white-stucco building tucked away behind the water treatment plant's main office on Swift Street. A few vines crawl up the sides and a bronze plaque out front shows that next year will mark its centennial, 100 years filtering the water of hundreds of thousands of residents, including approximately 43,000 current customers. But last year, more than raw water floated into its basins. A filmy sheen of green creeped in on top of the water, something John West, water filtration plant operator, had not seen before. Blue-green algae, or cyanobacteria, had made its way into the plant.
The Auburn Citizen – News: