When plumbing goes unused, water sits in pipes, where the level of leached metals and harmful bacteria colonies can increase.
“Plumbing is meant to be used,” said Andrew Whelton, an associate professor of civil engineering at Purdue University in Indiana.
Even the water sources may be different. The University of Iowa has its own water supply system; the University of Wisconsin-Eau Claire runs off a city system.Because of the sheer number and variety of buildings, water management at university campuses is challenging and hinders a uniform approach to maintain water quality after extended vacancies.for minimizing risks in water systems for— the bacteria that causes Legionnaires’ disease.
In previous studies of how water quality changes when it sits stagnant in pipes, Whelton has looked at how three days or seven days of stagnation affects water quality. According to Whelton, whenever he and his team have done these studies, they’ve received pushback that their approach “is unrealistic” and “no drinking water system or plumbing system would ever be stagnated for more than three days.
Day after day for the last three months, a team of workers has gone through the 33 buildings on upper and lower campus. Mohammad Attalla, executive director of facilities and services at the University of Illinois at Urbana-Champaign, recalls “marathon meetings” on March 21 and 22 to plan out his department’s game plan. Twice a week, the campus’ water station staff flushes main water lines and runs all water sources inside the campus’ 507 buildings.
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