EPCOR has been tracking the issue of water quality in large buildings that have been vacant or nearly vacant over the last couple of months. As you are aware, water quality in large buildings (office buildings, hotels, schools, libraries, recreational facilities, commercial buildings) will degrade over time if the building water system is not in use. As re-integration plans move forward, facility operators will need to take note and consider putting plans in place to flush and maintain their water systems prior to re-entry.
EPCOR and the City of Calgary are trying to bring awareness to the issue and have shared the documents below from Environmental Policy and Research Institute.
This document is meant as a starting point to bring awareness of the issue of water quality degradation in building plumbing when it is not used, or water use is significantly reduced. y.
also see second article on Reducing Risk to staff during flushing. FINAL_Reducing-Risk-to-Staff-Flushing-Buildings-20200501