For the year 2016 - "454 spills and releases were reported by our employees, 87% of which were related to leaks of halocarbon from air- conditioning systems."
"338 incidents were below government reporting thresholds (84% of the 454 reported)"
"No environmental infractions resulted in fines"
Quoted from Bell Canada Environmental Programs - Environmental Incidents: http://www.bce.ca/responsibility/corporate-responsibility/2016-cr-report/2016-environmental-incidents.pdf