USPS began implementing new service standards for first-class mail, periodicals, marketing mail, and package services.

USPS changes are aimed to cut costs. Will it take longer for your mail, packages to be delivered? What we know about new delivery standards.

Here's what to know about the changes to mail delivery, when they will take place and how they will affect Arizonans. The first round of changes started on April 1. Some areas could get "2-3-day turnaround service within regions and specific local areas," according to the postal service.