MS4 Storm Sewer Outfalls

The dataset contains locations and attributes of the MS4 Storm Sewer outfalls created as part of the District MS4 Permit. GPS outfall locations were captured in 2004-2006 by, then, DC WASA. A database provided by WASA identified outfalls, drainage structures, and MS4 outfall locations. The data was later verified in conjunction between DOEE and DCWater along with field verification. Updates occur as needed. This data is used for planning and modeling purposes by various District programs. This data is a requirement of the District's MS4 Permit.

Outfall ID Identification:

0-1999 - Originally provided outfall IDs

2000-2999 – Outfalls discovered from GIS and map analysis and later field verified

3000-3999 – Outfalls discovered during field work but with no additional info available

4000-4999 – Outfalls that can not be found in the field or cannot be verified
Organization: District of Columbia
Organization URL: https://catalog.data.gov/organization/district-of-columbia
Last updated: 2026-02-06T00:00:00.000Z
Tags: D.C., DC, District, District of Columbia, MS4, Outfalls, Storm Sewer, Washington, drainage area, environment, rain, storm