Call the Town of Creston. An after hour answering service is available, and this service will contact the on-call crew member.
Town of Creston will check the sewer main.
If there is a clean out on property line the Town of Creston will snake it.
If after the clean out has been snaked and is clear to the sewer main and the blockage is on private property, the owner will have to call a private contractor
If there is no clean out and the sewer main is running, then the owner must call a contractor.
The owner has the right to have a contractor camera their sewer service.