The Sewer Maintenance Division responds to every sewer backup call. In order for the City to check the customers lateral line, the customers home must have cleanouts installed in the yard. The City can check the sewer main, but if the problem lies within the customers lateral line, a plumber must be called. During business hours please contact 972-230-5724 for sewer backup concerns. If your problem occurs after 5:00 p.m. or on the weekend, please call the After Hours answering service at 972-780-6641 immediately.