I had luck reporting water/sewer under the "utility" section.

Comments update: 14-00180940-Street Repair
1726 4th Street Northwest, Washington, DC 20001, USA
This issue has an image. You can view it here http://seeclickfix.com/issues/1144026 . Did not see a category for water/sewer issues in the 311 app. Maybe
By CRAIG, DIRK: 11/24/2014 10:41:07 AM
Dc water has been notified, they can be reached at 202-612-3400 for further questions or concerns.