MURDOCK — The Charlotte County Commission rejected requests Tuesday from several Waste Management competitors asking for the chance to bid on the county’s multimillion-dollar garbage-collection contract, and instead opted to extend the 15-year agreement with Waste Management an extra five years.

In exchange, Waste Management, which has had an exclusive agreement with Charlotte since 2000, agreed, among other things, to provide residential customers with new, covered recycling carts at no cost to the county, and to freeze collection rates through October 2016. Under county ordinances, a rate case study, which analyzes costs and revenues, is required every three years. As amended, the contract, which would have expired in 2015, guarantees roughly $1.6 million in savings to the county, officials said, because Waste Management agreed to forgo the 2013 rate study until 2016.