The United States Postal Service is refining its service standards, which is sure to impact the speed of deliveries in Illinois.
The service said these changes will improve efficiency and transparency for USPS customers but has admitted that some deliveries will be slowed.
Phase one of implementation began on April 1, while phase two is set to start on July 1.
The USPS said the majority of mail and packages will retain the same service standards, while others will receive faster or slightly slower service.
For First-Class Mail, the Postal Service said 75% will be delivered at the same standard, while 14% will be delivered faster and 11% will be delivered slower.
