The 2% service fee is non-refundable. Sign up for MDC Alerts powered by Everbridge to be notified of water or sewer emergencies by phone, email or text! There is help available for residents with overdue bills and balances on their MDC water bills. MDC offices will close early on Thursday, December 31 at 12PM and be closed Friday, January 1 for the New Year’s Day Holiday. Acceptable forms of payment are American Express, Discover, Master Card, Visa, and eCheck. Company.