CALGARY — The city’s booming population growth is filling more than the suburbs: Calgary’s sewage lagoons are also close to overflowing.

The city pumps its biosolids from wastewater treatment facilities into the southeast Shepard sludge lagoons. Even through the city has a sophisticated system for turning sludge into fertilizer for farmer’s fields, the treatment program cannot keep up with the increasing volume of biosolids, the utilities committee heard Wednesday.

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