The main ONWASA customer service office will close on Friday, December 16, 2011, from 11:30 a.m. to 1:30 p.m. to allow employees to attend an ONWASA function.
You may make a telephone payment and access your account balance information 24 hours a day by calling 1-888-626-9055. Please have your credit/debit card and ONWASA account number ready.
