WSSC Water has partnered with Promise to offer customers flexible, convenient, and affordable PromisePay payment plans to help customers get back on their feet financially.
Promise’s mission is to help utilities and government agencies better serve all their customers - especially those who may need a little bit of assistance. Enrolling is easy and can be done at wsscwater.promise-pay.com in a matter of minutes. Once enrolled, WSSC Water customers will be able to manage their entire plans themselves - from choosing plan length to requesting extensions to changing their payment dates. If you have questions about enrolling in a PromisePay plan or would prefer to do so via the phone, call us at: 301-900-5551
Last Modified: February 5, 2026, 12:23 pm EST